Difference between revisions of "GEOS-Chem v10-01 benchmark history"

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(→‎1-month benchmark v10-01f with UCX chemistry)
(→‎1-month benchmark v10-01f with UCX chemistry)
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*NO: Difference over south pole appear may reflect small # differences where concentrations are very low.
 
*NO: Difference over south pole appear may reflect small # differences where concentrations are very low.
 
*ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
 
*ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
−
*Differences in Br/Cl species (Br2, BrO, BrNO3, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2O2) are likely attributed to the updated stratospheric Bry files.  Also, many of these species may also be exhibiting small # differences (esp. near the atmosphere top) where the
+
*Differences in Br/Cl species (Br2, BrO, BrNO3, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2O2) are likely attributed to the updated stratospheric Bry files.  Also, many of these species may also be exhibiting small # differences (esp. near the atmosphere top) where the concentrations are already low.
−
concentrations are already low.
+
 
*OCPI, OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts
 
*OCPI, OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts
 
*NH3: Small diffs at the surface may be attributed to the bug fix in wet scavenging by co-condensation.
 
*NH3: Small diffs at the surface may be attributed to the bug fix in wet scavenging by co-condensation.
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|Comments on ZONAL MEAN differences:
 
|Comments on ZONAL MEAN differences:
 
|
 
|
−
*
 
−
NO, O3, PAN (near tropopause), PRPE, N2O5 (near trop), HNO4, MP, DMS, OCPI, CH4, H2O, OH, HO2,
 
 
*ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
 
*ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
 
*Differences in the following species are likely due to small # differences: ALK4, ACET (near top of atm), MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C3H8, CH2O, DMS, SO4s, NH3, NIT, NITs, BCPO, OCPO, DST2, DST3, DST4, SALC, MPN, NO2, NO3, HNO2, N2O:  
 
*Differences in the following species are likely due to small # differences: ALK4, ACET (near top of atm), MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C3H8, CH2O, DMS, SO4s, NH3, NIT, NITs, BCPO, OCPO, DST2, DST3, DST4, SALC, MPN, NO2, NO3, HNO2, N2O:  
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*#Small # differences where concentrations are already low
 
*#Small # differences where concentrations are already low
 
*HNO3: Differences near the surface were the result of a [[HEMCO#Features_added_prior_to_the_v10-01e_1-year_benchmark|bug in the HEMCO PARANOX ship emissions module]] that was present in the v10-01e 1-month benchmark, but has since been fixed.  Differences at other altitudes may be caused by small number differences.
 
*HNO3: Differences near the surface were the result of a [[HEMCO#Features_added_prior_to_the_v10-01e_1-year_benchmark|bug in the HEMCO PARANOX ship emissions module]] that was present in the v10-01e 1-month benchmark, but has since been fixed.  Differences at other altitudes may be caused by small number differences.
−
*Differences in OCPI may be attributed
+
*Differences in OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts.
 +
*SO4s and NITs: This is a result of [[HEMCO#Features_added_prior_to_the_v10-01e_1-year_benchmark|bug fix in how HEMCO computes the alkalinity]].  This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
 
|-
 
|-
 
|In the EMISSION RATIO maps, list all species that changed by 10% or more:
 
|In the EMISSION RATIO maps, list all species that changed by 10% or more:

Revision as of 16:38, 9 January 2015

On this page we have posted complete information about all benchmark simulations (both 1-month and 1-year) for GEOS-Chem v10-01.

1-year benchmarks

v10-01e-Run0

This 1-year benchmark simulation was approved by HEMCO developer Christoph Keller and the GEOS-Chem Steering Committee on 01 Dec 2014.

Three GEOS-Chem model versions were compared to each other:

Color Quantity Plotted Met Type Year Emissions Photolysis Linoz Annual Mean OH
[105 molec/cm3]
Red v9-02r-geosfp-Run1 GEOS-FP,
47L, 4x5 		2013 Same as v9-02r-geos5-Run0
+Anthropogenic emissions scaled to 2010 (latest available)
+ 2011 GFED3 emissions (latest available)
+ Olson 2001 land map 		Same as v9-02r-geos5-Run0 ON 12.689
Green v10-01c-Run0 GEOS-FP,
47L, 4x5 		2013 " " FAST-JX v7.0 photolysis mechanism, with the following fixes included: ON 12.550
Blue v10-01e-Run0 GEOS-FP,
47L, 4x5 		2013 HEMCO emissions component, with the following update included: " " ON 12.578
Black Observations            

The output plots for Run0 (both PostScript and PDF format) may be downloaded from: 

ftp ftp.as.harvard.edu
cd gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01e/Run0/output/pdf
mget *

You may also view the PDF files online by pointing your browser to 

http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01e/Run0/output/pdf/

--Melissa Sulprizio 11:07, 20 November 2014 (EST)

Comments about the 1-year benchmark v10-01e

Jeff Pierce wrote:

The carbonaceous aerosols have definitely changed since the last benchmark, but now OCPI over tropical forests is less than 10% of the OCPI pre-HEMCO (page 35 of the ratios). Can you confirm that the 0.1*monoterpenes is being added to OCPI as it was pre-HEMCO?

Melissa Sulprizio responded:

I found an error in the MEGAN emissions. In the HEMCO configuration file, we have MEGAN_SOA turned on by default because HEMCO knows to ignore the SOA species if we are not running a SOA simulation. However, with MEGAN_SOA turned on, we don’t execute the part of the code where we add 0.1*monoterpenes to OCPI. Therefore, as you noted, we see lower OCPI concentrations over tropical forests. Turning MEGAN_SOA off fixes this problem.

Shiliang Wu wrote:

The O3 profiles show some large increases (up to 30ppb or more) in Jan for certain locations, such as Uccle(51), Hohenpeissenberg(48), Kagoshima(32), Shanghai(31), etc. - these don't look to be due to emission change, so I wonder what's causing this?

Christoph Keller wrote:

There were two open questions regarding the 1-yr benchmark (at least to my knowledge):
1. The ozone ‘blob’ forming over Europe in January
2. The much lower concentration of NITs and SO4s in v10-01e compared to v10-01c.
I think I have an explanation for both points, and I would argue that the new code makes more sense physically:
1. The ozone blob is actually a good thing as it removes an issue that was introduced in v9-02r. As Melissa pointed out to me, ever since v9-02r we have been seeing a drastic decrease of ozone over Europe (and to a lesser extent East Asia) in January. This was because PARANOX could produce - under low O3 conditions - incredibly high O3 deposition values (division of a high number by a very, very small number). This would basically create a black hole for ozone at the surface that would then remove more and more ozone from the entire column. Melissa did a number of sensitivity studies where she ran v10-01c with and without PARANOX, and those plots show this effect very nicely. The new code does not allow such a behavior anymore, which explains the higher ozone concentrations in January compared to v10-01e.
2. NITs and SO4s are closely linked to sulfate chemistry and thus alkalinity. Alkalinity is directly obtained from the total mass of emitted sea salt aerosol, e.g. we approximate alkalinity = SSA. Since SSA is a 2D field but alkalinity is 3D, the sea salt aerosol need to be distributed vertically. In the old code, alkalinity was set to the total mass of emitted sea salt aerosol for every grid box that was below the PBL (zero otherwise). In other words, if the PBL was at level 11, the integrated alkalinity over this column was 10 times higher than the total mass of emitted sea salt aerosols in the same column. I found that not very realistic and therefore changed the alkalinity calculation so that it takes into account the fraction of the PBL. I also checked in with Fabien Paulot who has been working on this and he also thinks that this is the better way of doing it. After all, it ensures that the total alkalinity equals the total amount of emitted sea salt aerosols. This explains the much lower values for NITs and SO4s that we see in v10-01e compared to v10-01c.

--Melissa Sulprizio 11:33, 1 December 2014 (EST)

v10-01c-Run1

This 1-year benchmark simulation was approved by the GEOS-Chem Steering Committee on 26 Jun 2014.

Three GEOS-Chem model versions were compared to each other:

Color Quantity Plotted Met Type Year Chemistry mechanism Photolysis Linoz Annual Mean OH
[105 molec/cm3]
Red v9-02r-geosfp-Run1 GEOS-FP,
47L, 4x5 		2013 Same as v9-02r-geos5-Run0 Same as v9-02r-geos5-Run0 ON 12.689
Green v10-01c-Run0 GEOS-FP,
47L, 4x5 		2013 " " FAST-JX v7.0 photolysis mechanism, with the following fixes included: ON 12.550
Blue v10-01c-Run1 GEOS-FP,
72L, 4x5 		2013 UCX chemistry mechanism, includes: " " ON 11.885
Black Observations            

The output plots for Run1 (both PostScript and PDF format) may be downloaded from: 

ftp ftp.as.harvard.edu
cd gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run1/output/ps
mget *
cd gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run1/output/pdf
mget *

You may also view the PDF files online by pointing your browser to 

http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run1/output/pdf/

--Melissa Sulprizio 16:54, 23 June 2014 (EDT)

v10-01c-Run0

This 1-year benchmark simulation was approved by the GEOS-Chem Steering Committee on 26 Jun 2014.

Three GEOS-Chem model versions were compared to each other:

Color Quantity Plotted Met Type Year Emissions Photolysis Linoz Annual Mean OH
[105 molec/cm3]
Red v9-02r-geosfp-Run0 GEOS-FP,
47L, 4x5 		2013 Same as v9-02r-geos5-Run0
(scaled all emissions to 2005) 		Same as v9-02r-geos5-Run0 ON 12.389
Green v9-02r-geosfp-Run1 GEOS-FP,
47L, 4x5 		2013 Anthropogenic emissions scaled to 2010 (latest available)
+ 2011 GFED3 emissions (latest available)
+ Olson 2001 land map 		" " ON 12.689
Blue v10-01c-Run0 GEOS-FP,
47L, 4x5 		2013 " " FAST-JX v7.0 photolysis mechanism, with the following fixes included: ON 12.550
Black Observations            

The output plots for Run0 (both PostScript and PDF format) may be downloaded from: 

ftp ftp.as.harvard.edu
cd gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run0/output/ps
mget *
cd gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run0/output/pdf
mget *

You may also view the PDF files online by pointing your browser to 

http://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/v10-01/v10-01c/Run0/output/pdf/

--Melissa Sulprizio 14:56, 10 June 2014 (EDT)

1-month benchmarks

v10-01f

We performed two 1-month benchmark simulations for v10-01f:

  1. v10-01f_trop: 1-month benchmark with tropopsheric chemistry
  2. v10-01f_UCX: 1-month benchmark with UCX strat-trop chemistry (72 vertical levels)

1-month benchmark v10-01f with UCX chemistry

Here is the assessment form for 1-month benchmark simulation v10-01f with UCX chemistry (aka v10-01f_UCX).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
  • ALD2 photolysis update: Jingqiu Mao (Princeton), Sebastian Eastham (MIT)
  • Stratospheric Bry fixes: Johan Schmidt (Harvard)
  • UCX fix: Sebastian Eastham (MIT)
  • Two-way coupling: Jintai Lin (Peking U.), Yingying Yan (Peking U.)
  • Tagged CO fixes: Jenny Fisher (U. Wollongong)
  • Flexible precision: GEOS-Chem Support Team
  • Nested CH updates: Yuxuan Wang (Tsinghua/Galveston)
  • HEMCO updates: Christoph Keller (Harvard)
  • Scavenging by co-condensation fix: Duncan Fairlie (NASA/Langley)
Version, resolution, met fields used: v10-01, GEOS-FP (72L), 4x5, July 2013
1-month benchmark finished on: Thu Jan 8 20:26:53 EST 2015
Performance statistics:
  • Ran on 8 CPUs of bench@titan-10.as.harvard.edu
  • Wall time: 6:04
  • Scalability: 6.8575
Compared to previous benchmark: v10-01e_UCX
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01f/v10-01f_trop/v10-01f_trop.results.html

NOTE: Unit tests for tagged CO and TOMAS were not performed, since these simulations are not yet 100% compatible with HEMCO.

Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01f/v10-01f_UCX/
Metrics
Global mean OH (from log file): 12.5428873166735 x 105 molec/cm3
Methyl chloroform lifetime: 4.9566 years
Did either of these change by more than 5%? No. The mean OH differs by -3.40%, and the MCF lifetime differs by 3.58%.
At the SURFACE, list all species that changed by 10% or more: NO (S. pole), ALK4, ISOP (at poles and over oceans), HNO3 (paranox bug), MEK, MVK, MACR, PMN, PRPE, N2O5, HNO4, DMS, SO4S and NITS (HEMCO bug), Br2, BrO, BrNO3, MPN, ISOPN, MOBA,, GLYC, MMN, RIP, IEPOX, NO2, NO3, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, OH
Comments on SURFACE differences:
  • NO: Difference over south pole appear may reflect small # differences where concentrations are very low.
  • ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
  • Differences in Br/Cl species (Br2, BrO, BrNO3, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2O2) are likely attributed to the updated stratospheric Bry files. Also, many of these species may also be exhibiting small # differences (esp. near the atmosphere top) where the concentrations are already low.
  • OCPI, OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts
  • NH3: Small diffs at the surface may be attributed to the bug fix in wet scavenging by co-condensation.
  • SO4s and NITs: This is a result of bug fix in how HEMCO computes the alkalinity. This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
  • HNO3: Differences over oceans were the result of a bug in the HEMCO PARANOX ship emissions module that was present in the v10-01e 1-month benchmark, but has since been fixed.
At 500 hPa, list all species that changed by 10% or more: NO, ALK4, ISOP, HNO3, MEK, MVK, MACR, PMN, PRPE, N2O5, HNO4, DMS, SO4s and NITs (HEMCO bug), NH3, NIT, OCPI, OCPO, DST4, Br2, Br, BrO, HBr, BRNO2, BrNO3, MPN, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, NO2, NO3, HNO2, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, OH, HO2
Comments on 500 hPa differences:
  • See notes above
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, O3, PAN (near tropopause), PRPE, N2O5 (near trop), HNO4, MP, DMS, OCPI, CH4, H2O (in strat), OH, HO2, ISOP, ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX, ALK4, ACET (near top of atm), MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C3H8, CH2O, DMS, SO4s, NH3, NIT, NITs, BCPO, OCPO, DST2, DST3, DST4, SALC, MPN, NO2, NO3, HNO2, N2O, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, CHBr3, CH2Br2, CH3Br, BrCl, HCl, H1211, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2.
Comments on ZONAL MEAN differences:
  • ISOP and related species (ISOPN, MOBA, HAC, GLYC, MMN, RIP, MAP, IEPOX) display similar patterns of small # differences, where concentrations are very low.
  • Differences in the following species are likely due to small # differences: ALK4, ACET (near top of atm), MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C3H8, CH2O, DMS, SO4s, NH3, NIT, NITs, BCPO, OCPO, DST2, DST3, DST4, SALC, MPN, NO2, NO3, HNO2, N2O:
  • Differences in stratospheric species (Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, CHBr3, CH2Br2, CH3Br, BrCl, HCl, H1211, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2) may be attributed to a combination of:
    1. The updated stratospheric Bry data files in HEMCO, and
    2. Small # differences where concentrations are already low
  • HNO3: Differences near the surface were the result of a bug in the HEMCO PARANOX ship emissions module that was present in the v10-01e 1-month benchmark, but has since been fixed. Differences at other altitudes may be caused by small number differences.
  • Differences in OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts.
  • SO4s and NITs: This is a result of bug fix in how HEMCO computes the alkalinity. This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
In the EMISSION RATIO maps, list all species that changed by 10% or more: *HNO3: Differences over oceans were the result of a bug in the HEMCO PARANOX ship emissions module that was present in the v10-01e 1-month benchmark, but has since been fixed.
Comments on EMISSION RATIO differences:
  • The lower values of NO, SO2, SO4 anthro + biofuel w/r/t v10-01e appear to be caused by a diagnostic issue that has been solved in v10-01f.
  • Also, some slight differences in the emission totals for the following species are explained as follows:
    • OCbg (Biogenic OC): Due to an error in the v10-01e 1-month benchmark, this diagnostic had returned all zeroes. This issue was fixed for the v10-01e 1-year benchmark and in the v10-01f 1-month benchmark.
    • The slight numerical differences in NOfe and NOso (fertilizer and soil NOx emission) was caused by updates made to introduce the flexible precision into v10-01f. Certain constants in routine BIOFIT are now defined with full precision in v10-01f.
    • The differences in BChp and OChp (hydrophilic tracer from hydrophobic tracer) are due to the fact that in v10-01e, HEMCO carried total BC and OC, whereas in v10-01f, HEMCO now carries the hydrophilic and hydrophobic fractions as separate tracers: BCPI, BCPO, OCPI, OCPO. Also, in v10-01f, the Bond et al emissions files were reprocessed in order to split the hydrophilic and hydrophobic fractions.
Additional or summary comments:
Approval
Requires further investigation:
Approved by:
Date of approval:

--Melissa Sulprizio 17:38, 6 January 2015 (EST)

1-month benchmark v10-01f with tropospheric chemistry

Here is the assessment form for 1-month benchmark simulation v10-01f with tropospheric chemistry (aka v10-01f_trop).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
  • ALD2 photolysis update: Jingqiu Mao (Princeton), Sebastian Eastham (MIT)
  • Stratospheric Bry fixes: Johan Schmidt (Harvard)
  • UCX fix: Sebastian Eastham (MIT)
  • Two-way coupling: Jintai Lin (Peking U.), Yingying Yan (Peking U.)
  • Tagged CO fixes: Jenny Fisher (U. Wollongong)
  • Flexible precision: GEOS-Chem Support Team
  • Nested CH updates: Yuxuan Wang (Tsinghua/Galveston)
  • HEMCO updates: Christoph Keller (Harvard)
  • Scavenging by co-condensation fix: Duncan Fairlie (NASA/Langley)
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Wed Jan 7 14:59:29 EST 2015
Performance statistics:
  • Ran on 8 CPUs of bench@titan-10.as.harvard.edu
  • Wall time: 2:49
  • Scalability: 7.0954
Compared to previous benchmark: v10-01e_trop
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01f/v10-01f_trop/v10-01f_trop.results.html

NOTE: Unit tests for tagged CO and TOMAS were not performed, since these simulations are not yet 100% compatible with HEMCO.

Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01f/v10-01f_trop/
Metrics
Global mean OH (from log file): 13.5245943486961 x 105 molec/cm3
Methyl chloroform lifetime: 4.7552 years
Did either of these change by more than 5%? No. The mean OH differs by -0.15%, and the MCF lifetime differs by -0.14%.
At the SURFACE, list all species that changed by 10% or more: NO, ISOP, HNO3, MVK, MACR, PMN, SO2, SO4s, NH4, NIT, OCPI, OCPO, DST4, ISOPN, RIP, NH3, HNO3
Comments on SURFACE differences:
  • NO: Difference over south pole appear may reflect small # differences where concentrations are very low.
  • ISOP, MVK, MACR, PMN, ISOPN, RIP, SO2, DST4: Appear to be small # differences over the ocean where concentrations are already low.
  • OCPI, OCPO: HEMCO now computes emission for hydrophilic and hydrophobic OC as separate species. In the v10-01e 1-month benchmark, HEMCO computed total BC and OC, then separated into hydrophilic and hydrophobic parts
  • NH3: Small diffs at the surface may be attributed to the bug fix in wet scavenging by co-condensation.
  • SO4s and NITs: This is a result of bug fix in how HEMCO computes the alkalinity. This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
  • HNO3: Differences over oceans were the result of a bug in the HEMCO PARANOX ship emissions module that was present in the v10-01e 1-month benchmark, but has since been fixed.
At 500 hPa, list all species that changed by 10% or more: NO, SO4s, NIT, NITs, OCPI, OCPO, DST4, ISOPN, RIP
Comments on 500 hPa differences:
  • NO: Differences at S. Pole may be caused by small # differences where concentrations are very low.
  • ISOPN, RIP: Appear to be small # differences, where concentrations are already low.
  • SO4s and NITs: This is a result of bug fix in how HEMCO computes the alkalinity. This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
  • NIT: Small differences can be attributed to numerical drift caused by ISORROPIA.
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, ISOP, MVK, MACR, PMN, C3H8, SO2, SO4s, NH3, NIT, NITs, OCPO, DST4, ISOPN, MAP, Br, Br2, BrNO3, NH3
Comments on ZONAL MEAN differences:
  • NO: Differences at S. Pole may be reflect small # differences where concentrations are very low.
  • Br, Br2, BrNO3: These differences are introduced by the new stratospheric Bry files via HEMCO. In the v10-01e code, we read these data at 4° x 5° resolution. In v10-01f, we read these at 2° x 2.5° and then regrid to 4° x 5°. Also, the new stratospheric Bry files correct the issue where the daytime & nighttime stratospheric Bry were the same.
  • ISOP, MVK, MACR, PMN, ISOPN, MAP, DST4, SO2, C3H8: These appear to be caused by small # differences where concentrations are already low.
  • SO4s and NITs: This is a result of bug fix in how HEMCO computes the alkalinity. This fix is in v10-01f and the v10-01e 1-year benchmark, but not in the v10-01e 1-month benchmark.
  • NH3: Small diffs at the surface may be attributed to the bug fix in wet scavenging by co-condensation.
  • NIT: Small differences can be attributed to numerical drift caused by ISORROPIA.
  • HNO3: Differences over oceans were the result of a bug in the HEMCO PARANOX ship emissions module that was present in the v10-01e 1-month benchmark, but has since been fixed.
In the EMISSION RATIO maps, list all species that changed by 10% or more: NO (anthro+biofuel), SO2 (anthro+biofuel), SO4 (anthro+biofuel)
Comments on EMISSION RATIO differences:
  • The lower values of NO, SO2, SO4 anthro + biofuel w/r/t v10-01e appear to be caused by a diagnostic issue that has been solved in v10-01f.
  • Also, some slight differences in the emission totals for the following species are explained as follows:
    • OCbg (Biogenic OC): Due to an error in the v10-01e 1-month benchmark, this diagnostic had returned all zeroes. This issue was fixed for the v10-01e 1-year benchmark and in the v10-01f 1-month benchmark.
    • The slight numerical differences in NOfe and NOso (fertilizer and soil NOx emission) was caused by updates made to introduce the flexible precision into v10-01f. Certain constants in routine BIOFIT are now defined with full precision in v10-01f.
    • The differences in BChp and OChp (hydrophilic tracer from hydrophobic tracer) are due to the fact that in v10-01e, HEMCO carried total BC and OC, whereas in v10-01f, HEMCO now carries the hydrophilic and hydrophobic fractions as separate tracers: BCPI, BCPO, OCPI, OCPO. Also, in v10-01f, the Bond et al emissions files were reprocessed in order to split the hydrophilic and hydrophobic fractions.
Additional or summary comments:
Approval
Requires further investigation: No
Approved by: Bob Y.
Date of approval: 08 Jan 2014

--Melissa Sulprizio 17:38, 6 January 2015 (EST) and
--Bob Y. 14:42, 8 January 2015 (EST)

v10-01e

We performed two 1-month benchmark simulations for v10-01e:

  1. v10-01e_trop: 1-month benchmark with tropopsheric chemistry
  2. v10-01e_UCX: 1-month benchmark with UCX strat-trop chemistry (72 vertical levels)

1-month benchmark v10-01e with UCX chemistry

Here is the assessment form for 1-month benchmark simulation v10-01e with UCX chemistry (aka v10-01e_UCX).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
Version, resolution, met fields used: v10-01, GEOS-FP (72L), 4x5, July 2013
1-month benchmark finished on: Thu Nov 6 00:26:55 EST 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-10.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 5:44
  • Scalability: 7.0316
Compared to previous benchmark: v10-01d_UCX
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: <tt>ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01e/v10-01e_UCX/v10-01e.results.html

NOTE: Unit tests for tagged CO and TOMAS were not performed, since these simulations are not yet 100% compatible with HEMCO.

Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01e/v10-01e_UCX/
Metrics
Global mean OH (from log file): 12.9849685422903 x 105 molec/cm3
Methyl chloroform lifetime: 4.7803 years
Did either of these change by more than 5%? No. The mean OH differs by -0.74%, and the MCF lifetime differs by 0.49%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, OCPO, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2, BrCl, Cl, ClO, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, OH, HO2
Comments on SURFACE differences:
  • HEMCO now reads all input data from netCDF files and automates the emission calculation process. Specifically, all input data (base emissions, scale factors, masks) are regridded onto the simulation grid before any data manipulation is performed. This fact alone can cause local emission differences on the order of 10%, e.g. for GFED-3 emissions over some areas in Africa and South America.
  • NO emissions over the US are approx. 25% higher compared to v10-01d. This is partly because of the regridding artifact mentioned above and partly because the NEI2005 emissions have now been lumped into the surface level. In v10-01d, NEI-2005 input data were distributed over 5 levels but only the lowest 2 were used for emission calculation.
  • The difference in ISOP and related biogenic species can be attributed to the fact that the MEGAN biogenic emissions in HEMCO were modified to only use the current day's leaf area index (LAI). In v10-01d and prior versions, the LAI was interpolated from the previous and current months. This change may be responsible for the large relative change of e.g. ISOP above 60 degrees N. Absolute concentrations are very small in the areas where relative changes are large.
  • Differences in DMS may be attributed to the fact that HEMCO uses a new updated air-sea exchange module. The air-sea exchange module centralizes this computation and uses the same parameterization scheme for all compounds. (In v10-01d and prior versions, this computation was repeated in several locations in the code.) The new air-sea exchange module seems to give lower DMS concentrations than the prior code.
  • The C2H6 differences are due to biofuel emissions over Europe, North America and Asia, which were not taken into account in v10-01d. This effect is most obvious in Asia, where biofuel emissions are highest.
  • SO2: HEMCO uses a different volcanic input file (still the same Diehl inventory) and a new vertical regridding scheme, which may be responsible for the SO2 differences. The same is also true for the AEIC emissions, which are now vertically regridded on-the-fly by the new vertical regridding scheme.
  • UCX stratospheric species are almost all similar to v10-01d.
At 500 hPa, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, H2O2, MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C2H6, N2O5, HNO4, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, OCPO, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2, BrCl, Cl, ClNO2, OClO, Cl2, Cl2O2
Comments on 500 hPa differences:
  • See comments on surface differences. Differences in SO2 and SO4 may be due to the new AEIC aircraft emission inventory as well as differences between the bpch and netCDF files of the volcanic emissions.
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, PRPE, C3H8, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, BCPO, OCPO, DST1, DST2, DST3, SALC, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2, OCS, BrCl, CCl4, CH3CCl3, CFC11, H1211, H1301, H2402, Cl, HOCl, ClNO3, ClNO2, ClOO, OClO, Cl2, Cl2O2, OH
Comments on ZONAL MEAN differences:
  • Most zonal diffs are small in absolute value but may be large in % value. This may reflect small-number statistics.
  • Differences in DMS and ACET may be attributed to the new air-sea exchange module used by HEMCO.
  • Differences of ISOP and other related biogenic species over the Northern boreal latitudes may be attributed to the change that was made in MEGAN. MEGAN now uses the current day's LAI instead of interpolating it from the previous & current months.
  • Changes in H2O2 may be related to wet deposition.
In the EMISSION RATIO maps, list all species that changed by 10% or more:
  • Anthropogenic emissions: ACET, ALD2, ALK4, C2H6, C3H8, CH2O, CO, MEK, NH3, NO, PRPE, SO2, SO4
  • Biomass emissions: ACET, ALD2, ALK4, C2H6, C3H8, CH2O, CO, MEK, OC, PRPE, SO2
  • Biogenic emissions: ACET, DMS, ISOP, PRPE
  • OTHER:
    • ACET from MONOT emissions, ACET from MBO emissions, ACET direct emissions, ACET from ocean source emissions
    • CO from MONOT emissions
    • NO aircraft emissions, NO fertilizer emissions, NO soil emissions, NO lightning emissions
    • SO2 aircraft emissions, SO2 ship emissions
Comments on EMISSION RATIO differences:
  • HEMCO does not separate anthropogenic and biofuel emissions. In some plots we are comparing the total of anthro+biofuel (v10-01e) to v10-01d.
  • HEMCO now passes ACET ocean sink to dry deposition, and doesn't explicitly write it out as a diagnostic
  • HEMCO now lumps eruptive and non-eruptive volcano emissions into one diagnostic (SO2-EV-$)
  • Differences in aircraft and volcano emissions w/r/t v10-01d are likely introduced by the MESSy vertical regridding routines.
  • Differences in ISOP and other key biogenic-emitting species are likely due to the change in how MEGAN uses leaf-area-index data w/r/t v10-01d.
  • ACET and DMS emissions now use a different air-sea exchange module (in HEMCO) w/r/t v10-01d.
Additional or summary comments:
  • GEOS-Chem v10-01d and prior versions use a klunky emissions interface. There was a significant amount of hardwiring, especially in the application of scale factors and masks. In v10-01e, HEMCO has completely replaced this legacy emissions interface. We have tried to replicate the emissions output r of v10-01d to the greatest extent possible. But in v10-01e+HEMCO, we have also brought in a couple of newer inventories (volcanoes, etc.) while also introducing a new vertical regridding scheme. So we will not be able to replicate the v10-01d emissions to 100% accuracy.
  • In v10-01d, the PARANOX ship plume model was called immediately before PBL mixing. In v10-01e, PARANOX is now called from within HEMCO at the same time that all the other emissions are computed.
  • As of this benchmark, the following simulations are not yet fully compatible with HEMCO.
  • The APM aerosol microphysics will have to be completely re-integrated once v10-01 ships.
Approval
Requires further investigation: No
Approved by: Bob Y. and Christoph Keller
Date of approval: 06 Nov 2014

--Melissa Sulprizio 06:29, 6 November 2014 (EST)
--Bob Y. 10:24, 6 November 2014 (EST)

1-month benchmark v10-01e with tropospheric chemistry

Here is the assessment form for 1-month benchmark simulation v10-01e with tropospheric chemistry (aka v10-01e_trop).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Wed Nov 5 18:31:03 EST 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-10.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:40
  • Scalability: 7.2007
Compared to previous benchmark: v10-01d_trop
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01e/v10-01e_trop/v10-01e.results.html

NOTE: Unit tests for tagged CO and TOMAS were not performed, since these simulations are not yet 100% compatible with HEMCO.

Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01e/v10-01e_trop/
Metrics
Global mean OH (from log file): 13.5883620833673 x 105 molec/cm3
Methyl chloroform lifetime: 4.7619 years
Did either of these change by more than 5%? No. The mean OH differs by -0.62%, and the MCF lifetime differs by 0.22%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, H2O2, ACET, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, OCPO, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2, OH, HO2
Comments on SURFACE differences:
  • HEMCO now reads all input data from netCDF files and automates the emission calculation process. Specifically, all input data (base emissions, scale factors, masks) are regridded onto the simulation grid before any data manipulation is performed. This fact alone can cause local emission differences on the order of 10%, e.g. for GFED-3 emissions over some areas in Africa and South America.
  • NO emissions over the US are approx. 25% higher compared to v10-01d. This is partly because of the regridding artifact mentioned above and partly because the NEI2005 emissions have now been lumped into the surface level. In v10-01d, NEI-2005 input data were distributed over 5 levels but only the lowest 2 were used for emission calculation.
  • The difference in ISOP and related biogenic species can be attributed to the fact that the MEGAN biogenic emissions in HEMCO were modified to only use the current day's leaf area index (LAI). In v10-01d and prior versions, the LAI was interpolated from the previous and current months. Many of the differences are evident in the boreal forests, and in the Amazon, where a small change in LAI could result in a big increase in ISOP. ISOP increases by about ~5ppb in these regions.
  • Differences in ACET and DMS may be attributed to the fact that HEMCO uses a new updated air-sea exchange module. The air-sea exchange module centralizes this computation and uses the same parameterization scheme for all compounds. (In v10-01d and prior versions, this computation was repeated in several locations in the code.) The new air-sea exchange module seems to give lower concentrations than the prior code.
  • Differences in C2H6 may be attributed to biofuel emissions over Europe, North America and Asia, which were not taken into account in v10-01d. This effect is most obvious in Asia, where biofuel emissions are highest.
  • SO2: HEMCO uses a different volcanic input file (still the same Diehl inventory) and a new vertical regridding scheme, which may be responsible for the SO2 differences. The same is also true for the AEIC emissions, which are now vertically regridded on-the-fly by the new vertical regridding scheme.
At 500 hPa, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, H2O2, MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C2H6, N2O5, HNO4, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, OCPO, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2
Comments on 500 hPa differences:
  • See comments on surface differences.
  • Differences in SO2 and SO4 may be due to the new AEIC aircraft emission inventory as well as differences between the bpch and netCDF files of the volcanic emissions.
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, PRPE, C3H8, CH2O, C2H6, N2O5, HNO4, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, OCPI, BCPO, OCPO, DST3, SALC, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2, OH
Comments on ZONAL MEAN differences:
  • Most zonal diffs are small in absolute value but may be large in % value. This may reflect small-number statistics.
  • Differences in DMS and ACET may be attributed to the new air-sea exchange module used by HEMCO.
  • Differences in C2H6 may be related to how aircraft emissions are vertically regridded by HEMCO.
  • Differences of ISOP and other related biogenic species over the Northern boreal latitudes may be attributed to the change that was made in MEGAN. MEGAN now uses the current day's LAI instead of interpolating it from the previous & current months.
  • Changes in H2O2 may be related to wet deposition.
In the EMISSION RATIO maps, list all species that changed by 10% or more:
  • Anthropogenic emissions: ACET, ALD2, ALK4, C2H6, C3H8, CH2O, CO, MEK, NH3, NO, PRPE, SO2, SO4
  • Biomass emissions: ACET, ALD2, ALK4, C2H6, C3H8, CH2O, CO, MEK, OC, PRPE, SO2
  • Biogenic emissions: ACET, DMS, ISOP, PRPE
  • OTHER:
    • ACET from MONOT emissions, ACET from MBO emissions, ACET direct emissions, ACET from ocean source emissions
    • CO from MONOT emissions
    • NO aircraft emissions, NO fertilizer emissions, NO soil emissions, NO lightning emissions
    • SO2 aircraft emissions, SO2 ship emissions
Comments on EMISSION RATIO differences:
  • HEMCO does not separate anthropogenic and biofuel emissions. In most plots we are comparing the total of anthro+biofuel (v10-01e) to v10-01d, so differences are apparent.
  • HEMCO now passes ACET ocean sink to dry deposition, and doesn't explicitly write it out as a diagnostic
  • HEMCO now lumps eruptive and non-eruptive volcano emissions into one diagnostic (SO2-EV-$)
  • Differences in aircraft and volcano emissions w/r/t v10-01d are likely introduced by the MESSy vertical regridding routines.
  • Differences in ISOP, ACET, DMS, and other key biogenic-emitting species are likely due to the change in how MEGAN uses leaf-area-index data w/r/t v10-01d.
  • ACET and DMS emissions now use a different air-sea exchange module (in HEMCO) w/r/t v10-01d.
  • The decrease in NH3 over SE Asia may be related to the Streets NH3 inventory.
Additional or summary comments:
  • GEOS-Chem v10-01d and prior versions use a klunky emissions interface. There was a significant amount of hardwiring, especially in the application of scale factors and masks. In v10-01e, HEMCO has completely replaced this legacy emissions interface. We have tried to replicate the emissions output r of v10-01d to the greatest extent possible. But in v10-01e+HEMCO, we have also brought in a couple of newer inventories (volcanoes, etc.) while also introducing a new vertical regridding scheme. So we will not be able to replicate the v10-01d emissions to 100% accuracy.
  • As of this benchmark, the following simulations are not yet fully compatible with HEMCO.
  • The APM aerosol microphysics will have to be completely re-integrated once v10-01 ships.
Approval
Requires further investigation: No
Approved by: Bob Y. and Christoph Keller
Date of approval: 06 Nov 2014

--Melissa Sulprizio 06:23, 6 November 2014 (EST)
--Bob Y. 10:13, 6 November 2014 (EST)

v10-01d

We performed two 1-month benchmark simulations for v10-01d:

  1. v10-01d_trop: 1-month benchmark with tropopsheric chemistry
  2. v10-01d_UCX: 1-month benchmark with UCX strat-trop chemistry (72 vertical levels)

1-month benchmark v10-01d with UCX chemistry

Here is the assessment form for 1-month benchmark simulation v10-01d with UCX chemistry (aka v10-01d_UCX).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
  • ISOPO2 isomerization reaction fix: Ploy Achakulwisut (Harvard)
  • FAST-JX v7.0 update: Sebastian Eastham (MIT), Jingqiu Mao (Princeton)
  • NetCDF define mode: GEOS-Chem Support Team
  • Nested grid parallelization fix: Jintai Lin (Peking U.)
  • ND44 fix for sea salt: Kateryna Lapina (CU Boulder)
Version, resolution, met fields used: v10-01, GEOS-FP (72L), 4x5, July 2013
1-month benchmark finished on: Mon Jun 2 20:00:41 EDT 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-08.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 5:52
  • Scalability: 6.8095
Compared to previous benchmark: v10-01c with UCX chemistry
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01d/v10-01d_UCX/v10-01d.results.html
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01d/v10-01d_UCX/
Metrics
Global mean OH (from log file): 13.0813437885412 x 105 molec/cm3
Methyl chloroform lifetime: 4.7621 years
Did either of these change by more than 5%? No. The mean OH differs by -0.25%, and the MCF lifetime differs by 0.34%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ISOP, H2O2, MVK, MACR, PMN, PRPE, CH2O, N2O5, HNO4, MP, DMS, NIT, DST4, Br, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP, Cl, OClO, Cl2O2, HO2
Comments on SURFACE differences:
  • HAC shows large increases at the surface. We attribute this to the fix for J(HAC) added to this version.
  • The other species listed here (particularly ISOP and its oxidation products) show large percent differences. But these occur in places where the concentrations of these species are already very low. We may attribute these differences to small-number statistics.
At 500 hPa, list all species that changed by 10% or more: NO, ISOP, MVK, MACR, PMN, PRPE, CH2O, N2O5, DMS, NH3, NIT, DST4, BrNO2, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP, Cl, OClO, Cl2O2
Comments on 500 hPa differences:
  • HAC shows large increases at 500 hPa. We attribute this to the fix for J(HAC) added to this version.
  • The other species listed here (particularly ISOP and its oxidation products) show large percent differences. But these occur in places where the concentrations of these species are already very low. We may attribute these differences to small-number statistics.
In the ZONAL MEAN differences, list all species that changed by 10% or more: PAN, ALK4, ISOP, MVK, MACR, PMN, PRPE, C3H8, N2O5, SO4s, NH3, NIT, NITs, DST2, DST3, SALC, Br, BrNO3, ISOPN, MOBA, HAC, MMN, RIP, IEPOX, MAP, OCS, CCl4, CH3CCl3, CFC11, H1211, H1301, H2402, Cl, ClNO2, Cl2O2
Comments on ZONAL MEAN differences:
  • HAC shows large zonal mean differences. We attribute this to the fix for J(HAC) added to this version.
  • Several species (particularly ISOP and its oxidation products) show large percent differences but small (~0.1 ppbv) absolute differences.
  • The "numerical noise" patterns in the NH3 and NIT percent differences may be attributed to ISORROPIA II.
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences:
  • None needed.
Additional or summary comments:
  • This benchmark was done to test a few last minute-fixes into the code before integrating HEMCO into GEOS-Chem. HEMCO will be tested with benchmark simulation v10-01e.
  • The fix for the ND44 drydep diagnostic described above only affects simulations done where the non-local PBL mixing is turned OFF. In this benchmark (and all GEOS-Chem benchmarks), we use the non-local PBL mixing scheme.
Approval
Requires further investigation: NO
Approved by: Melissa Sulprizio and Bob Yantosca
Date of approval: 03 Jun 2014

--Melissa Sulprizio 14:47, 2 June 2014 (EDT)
--Bob Y. 11:39, 3 June 2014 (EDT)

1-month benchmark v10-01d with tropospheric chemistry

Here is the assessment form for 1-month benchmark simulation v10-01d with tropospheric chemistry (aka v10-01d_trop).

Description
New features added into GEOS-Chem:

Features affecting the full-chemistry simulation in this benchmark:

Features not affecting the full-chemistry simulation in this benchmark:

Developer name(s) and institution(s):
  • ISOPO2 isomerization reaction fix: Ploy Achakulwisut (Harvard)
  • FAST-JX v7.0 update: Sebastian Eastham (MIT), Jingqiu Mao (Princeton)
  • NetCDF define mode: GEOS-Chem Support Team
  • Nested grid parallelization fix: Jintai Lin (Peking U.)
  • ND44 fix for sea salt: Kateryna Lapina (CU Boulder)
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Mon Jun 16 13:24:57 EDT 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-08.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:47
  • Scalability: 6.8980
Compared to previous benchmark: v10-01c with tropospheric chemistry
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01d/v10-01d_trop/v10-01d.results.html
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01d/v10-01d_trop/
Metrics
Global mean OH (from log file): 13.5883620833673 x 105 molec/cm3
Methyl chloroform lifetime: 4.7516 years
Did either of these change by more than 5%? No. The mean OH differs by -0.29%, and the MCF lifetime differs by 0.35%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ISOP, H2O2, MVK, MACR, PMN, PRPE, CH2O, N2O5, HNO4, MP, DMS, NIT, DST4, Br, BrO, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP
Comments on SURFACE differences:
  • HAC shows large increases at the surface. We attribute this to the fix for J(HAC) added to this version.
  • The other species listed here (particularly ISOP and its oxidation products) show large percent differences. But these occur in places where the concentrations of these species are already very low. We may attribute these differences to small-number statistics.
At 500 hPa, list all species that changed by 10% or more: NO, ISOP, MVK, MACR, PMN, PRPE, CH2O, N2O5, DMS, NH3, NIT, DST4, BrNO2, BrNO3, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP
Comments on 500 hPa differences:
  • HAC shows large increases at 500 hPa. We attribute this to the fix for J(HAC) added to this version.
  • The other species listed here (particularly ISOP and its oxidation products) show large percent differences. But these occur in places where the concentrations of these species are already very low. We may attribute these differences to small-number statistics.
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, ALK4, ISOP, MVK, MACR, PMN, PRPE, C3H8, N2O5, SO4s, NH3, NIT, NITs, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP
Comments on ZONAL MEAN differences:
  • HAC shows large zonal mean differences. We attribute this to the fix for J(HAC) added to this version.
  • Several species (particularly ISOP and its oxidation products) show large percent differences but small (~0.1 ppbv) absolute differences.
  • The "numerical noise" patterns in the NH3 and NIT percent differences may be attributed to ISORROPIA II.
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences:
  • None needed.
Additional or summary comments:
  • This benchmark was done to test a few last minute-fixes into the code before integrating HEMCO into GEOS-Chem. HEMCO will be tested with benchmark simulation v10-01e.
  • The fix for the ND44 drydep diagnostic described above only affects simulations done where the non-local PBL mixing is turned OFF. In this benchmark (and all GEOS-Chem benchmarks), we use the non-local PBL mixing scheme.
Approval
Requires further investigation: NO
Approved by: Melissa Sulprizio and Bob Yantosca
Date of approval: 03 Jun 2014

--Melissa Sulprizio 14:47, 2 June 2014 (EDT)
--Bob Y. 11:39, 3 June 2014 (EDT)

v10-01c

Because GEOS-Chem v10-01c was the version where we introduced the UCX chemistry mechanism, we performed two 1-month benchmark simulations:

  1. v10-01c_trop: 1-month benchmark with tropopsheric chemistry
  2. v10-01c_UCX: 1-month benchmark with UCX strat-trop chemistry (72 vertical levels)

--Bob Y. 13:15, 30 May 2014 (EDT)

Final recommendation for J-values

We were not able to include this final recommendation for J(HAC) and J(PAN) into the v10-01c_trop and v10-01c_UCX 1-month benchmarks. We will include these in the 1-year benchmarks for v10-01c.

--Bob Y. 17:16, 30 May 2014 (EDT)

1-month benchmark v10-01c with UCX chemistry

Here is the assessment form for 1-month benchmark simulation v10-01c with UCX chemistry (aka v10-01c_UCX).

Description
New features added into GEOS-Chem:

Features affecting the chemistry in this benchmark:

Features not affecting the chemistry in this benchmark:

Developer name(s) and institution(s):
Version, resolution, met fields used: v10-01, GEOS-FP (72L), 4x5, July 2013
1-month benchmark finished on: Thu May 29 00:01:33 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-09.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 5:51
  • Scalability: 6.7089
Compared to previous benchmark: v10-01c with tropospheric chemistry
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01c/v10-01c_UCX/v10-01c_Final.results.html
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01c/v10-01c_UCX/
Metrics
Global mean OH (from log file): 13.1136815995777 x 105 molec/cm3
Methyl chloroform lifetime: 4.7459 years
Did either of these change by more than 5%? No. The mean OH differs by -3.77%, and the MCF lifetimes differ by 0.23%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, HNO3, H2O2, MEK, RCHO, MVK, MACR, PMN, PPN, PRPE, N2O5, HNO4, MP, DMS, SO4s, NH3, NIT, NITs, DST4, Br2, Br, BrO, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, NO2, NO3, HNO2, OH, HO2
Comments on SURFACE differences:
  • Differences in the ratio plots of ISOP and its oxidation products over the oceans probably reflect small number differences.
At 500 hPa, list all species that changed by 10% or more: NO, ALK4, ISOP, HNO3, MEK, RCHO, MVK, MACR, PMN, PRPE, C3H8, N2O5, HNO4, MP, DMS, SO2, NH3, NIT, NITs, DST4, Br2, Br, BrO, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, NO2, NO3, HNO2, OH, HO2
Comments on 500 hPa differences:
  • The "noise" pattern in the NIT and NH3 plots reflect the numerical drift caused by ISORROPIA II
In the ZONAL MEAN differences, list all species that changed by 10% or more: All species, except for MSA and OCPI, changed by 10% or more.
Comments on ZONAL MEAN differences:
  • It is understandable that we would see differences of this magnitude in these species given that we have activated stratospheric chemistry. We are also using the full 72-layer grid as opposed to the 47-layer grid in the tropopause-only simulation.
  • The following species show small absolute differences but large percent differences:
    • ALK4, ISOP, MEK, ALD2, RCHO, MVK, MACR, PMN, R4N2, PRPE, C3H8, CH2O, C2H6, SO2, SO4s, MSA, NH3, NH4, NITs, BCPO, OCPO, DST1, DST2, DST3, DST4, SALA, SALC, BrNO2, CHBr3, CH2Br2, ISOPN, HAC, GLYC, MMN, HNO2
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences:
  • NOx sources (anthropogenic, aircraft, lightning, soils) changed very slightly in this run. This may be an artifact of comparing the data on the full 72-layer grid to the 47-layer grid of the previous benchmark.
  • The acetone ocean sink also decreased slightly (-0.000638 Tg C). This may also be an artifact of comparing the 72-level grid to the 47-level grid.
Additional or summary comments:
  • This simulation uses the KPP chemistry solver, while all past benchmarks have used SMVGEAR. UCX simulations are extremely slow when SMVGEAR is used, so KPP is the recommended solver.
  • Many of the structural updates (i.e. to speed up GEOS-Chem, to reduce the memory footprint, to fix issues in the specialty simulations) do not impact the full-chemistry simulation. This was validated with unit tests and difference tests.
  • IMPORTANT: We were unable to add the Final recommendation for J-values into this 1-month benchmark. We will add this into the 1-year benchmarks for v10-01c.
Approval
Requires further investigation: NO
Approved by: Daniel Jacob, Jingqiu Mao, Sebastian Eastham
Date of approval: 29 May 2014

--Bob Y. 13:11, 30 May 2014 (EDT)

1-month benchmark v10-01c with tropospheric chemistry

Here is the assessment form for 1-month benchmark simulation v10-01c with tropospheric chemistry (i.e. UCX off, aka v10-01c_trop).

Description
New features added into GEOS-Chem:

Features affecting the chemistry in this benchmark:

Features not affecting the chemistry in this benchmark:

Developer name(s) and institution(s):
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Wed May 28 17:57:45 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-09.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:49
  • Scalability: 6.7835
Compared to previous benchmark: v10-01b
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Unit test results may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01c/v10-01c_trop/v10-01c_Final.results.html
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01c/v10-01c_trop
Metrics
Global mean OH (from log file): 13.6273583437531 x 105 molec/cm3
Methyl chloroform lifetime: 4.7349 years
Did either of these change by more than 5%? No. The mean OH differs by -0.77%, and the MCF lifetimes differ by 1.37%.
At the SURFACE, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, H2O2, MEK, RCHO, MVK, MACR, PMN, PPN, PRPE, CH2O, N2O5, HNO4, MP, DMS, NIT, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO3, HNO2, OH, HO2
Comments on surface differences:
  • Most of the differences in ISOP and its products are over the oceans. This could be due to small number differences, since there is not a lot of ISOP in these locations.
  • We believe that the following differences are due to photolysis (FAST-JX in v10-01c_trop vs. FAST-J in v10-01b):
    • Differences in NO at the south pole
    • Differences in bromine species, particularly at the poles
    • Differences observed in DST4
At 500 hPa, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, H2O2, ACET, MEK, MVK, MACR, PMN, PRPE, CH2O, N2O5, HNO4, MP, DMS, SO2, NH3, NIT, DST4, Br2, Br, BrO, BrNO2, BrNO3, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO2, NO3, HNO2
Comments on 500 hPa differences:
  • Most of the differences in ISOP and its products are over the oceans. This could be due to small number differences, since there is not a lot of ISOP in these locations.
  • We believe that the following differences are due to photolysis (FAST-JX in v10-01c_trop vs. FAST-J in v10-01b):
    • Differences in NO at the south pole
    • Differences in bromine species, particularly at the poles
    • Differences observed in DST4
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, PAN, ALK4, ISOP, H2O2, ACET, MEK, MVK, MACR, PMN, PRPE, C3H8, CH2O, N2O5, MP, DMS, SO4s, NH3, NIT, NITs, Br2, Br, BrO, HOBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO3, HNO2, OH, HO2
Comments on ZONAL MEAN differences:
  • The following species show large percent differences but small absolute differences:
    • NO, PAN, ALK4, ISOP, MEK, MVK, MACR, PMN, R4N2, PRPE, CH2O, C3H8 (at top of atmosphere), N2O5, DMS, SO4s (at top of atmosphere), NITs (at top of atmosphere), DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, CHBr3, ISOPN, MOBA, NO2, NO3, HNO2,
  • Differences in ACET are probably caused by v10-01c having the correct pressure dependency for J(ACET) but v10-01b not having this fix applied.
  • Differences in NH3 and NIT are due to the numerical instability in ISORROPIA II.
  • Differences in HAC and GLYC are due to photolysis (FAST-JX vs. FAST-J).
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences:
  • The NO anthropogenic emissions only very slightly higher in v10-01c_trop (by 0.000343 Tg N). This is most likely due to the fix for FAST-JX wavelength bins propagating through to the PARANOX ship emissions plume model.
  • The ACET ocean sink is only slightly smaller (-0.106) in v10-01c_trop.
Additional or summary comments:
  • Many of the structural updates (i.e. to speed up GEOS-Chem, to reduce the memory footprint, to fix issues in the specialty simulations) do not impact the full-chemistry simulation. This was validated with unit tests and difference tests.
  • IMPORTANT: We were unable to add the Final recommendation for J-values into this 1-month benchmark. We will add this into the 1-year benchmarks for v10-01c.
Approval
Requires further investigation: NO
Approved by: Daniel Jacob, Jingqiu Mao, Sebastian Eastham
Date of approval: 29 May 2014

--Bob Y. 14:20, 30 May 2014 (EDT)

v10-01b

Here is the assessment form for 1-month benchmark simulation v10-01b.

Description
New features added into GEOS-Chem:
Developer name(s) and institution(s):
  • PROPNN molecular weight: Jenny Fisher (U. Wollongong)
  • TOMS O3 regridding: Jintai Lin (Peking U.)
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Wed Mar 5 15:06:00 EST 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-11.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:55
  • Scalability: 6.7949
Compared to previous benchmark: v10-01a
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01b/
Metrics
Global mean OH (from log file): 13.7339945052522 x 105 molec/cm3
Methyl chloroform lifetime: 4.6706 years
Did either of these change by more than 5%? No. Both the mean OH and MCF lifetimes differ by < 0.01%.
At the SURFACE, list all species that changed by 10% or more: NO, ISOP, MVK, MACR, PMN, NIT, DST4, ISOPN, MOBA, RIP
Comments on SURFACE differences:
  • Differences in most species are due to small number differences over the oceans or poles, where concentrations are small.
  • Differences in NIT can be attributed to numerical noise from ISORROPIA.
At 500 hPa, list all species that changed by 10% or more: NO, ISOP, NH3, NIT, DST4, ISOPN, MOBA, RIP
Comments on 500 hPa differences:
  • Differences in most species are due to small number differences over the oceans or poles, where concentrations are small.
  • Differences in NIT can be attributed to numerical noise from ISORROPIA.
In the ZONAL MEAN differences, list all species that changed by 10% or more: ALK4, ISOP, C3H8, SO4s, NH3, NIT, GLYC
Comments on ZONAL MEAN differences:
  • Differences in most species are due to small number differences above ~200 hPa, where concentrations are small.
  • Differences in NIT can be attributed to numerical noise from ISORROPIA.
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences:
Additional or summary comments:
  • Differences caused by the TOMS O3 update are not seen in the benchmark output. The benchmark simulation uses O3 columns from the GEOS-FP met fields, so TOMS O3 columns are not used.
Approval
Requires further investigation: No
Approved by: Jenny Fisher, Fabien Paulot
Date of approval: 06 Mar 2014

--Melissa Sulprizio 11:34, 6 March 2014 (EST)

v10-01a

Here is the assessment form for 1-month benchmark simulation v10-01a.

Description
New features added into GEOS-Chem:
Developer name(s) and institution(s):
  • Patrick Kim (Harvard)
Version, resolution, met fields used: v10-01, GEOS-FP (47L), 4x5, July 2013
1-month benchmark finished on: Mon Feb 3 15:05:32 EST 2014
Performance statistics:
  • Ran on 8 CPUs of bench@titan-09.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:48
  • Scalability: 6.8703
Compared to previous benchmark: v9-02r w/ GEOS-FP meteorology
This update will impact:
(select all that apply with boldface) 		Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify):
Plots may be viewed at: ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v10-01/v10-01a/
Metrics
Global mean OH (from log file): 13.7338316128900 x 105 molec/cm3
Methyl chloroform lifetime: 4.6707 years
Did either of these change by more than 5%? No. The mean OH differs by -0.02%, and the MCF lifetimes differ by 0.07%.
At the SURFACE, list all species that changed by 10% or more: NO, O3, PAN, ISOP, HNO3, H2O2, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, N2O5, DMS, NH3, NH4, NIT, OCPI, DST4, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, MPN, ISOPN, MOBA, PROPNN, HAC, GLYC, MMN, RIP, IEPOX, MAP, NO3, OH
Comments on SURFACE differences:
  • Differences in isoprene related tracers can be attributed to changing biogenic emissions because we now force the MODIS LAI year to 2008.
  • Differences in NO, DST4, and the bromine species are due to small number differences where concentrations are low.
  • Differences in NH4 and NIT can be attributed to numerical noise from ISORROPIA.
At 500 hPa, list all species that changed by 10% or more: NO, ISOP, MVK, MACR, PMN, PRPE, N2O5, DMS, NH3, NIT, DST4, Br2, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX, NO3
Comments on 500 hPa differences:
  • Differences in NO, DST4, and Br2 are due to small number differences where concentrations are low.
  • Differences in NH3 and NIT can be attributed to numerical noise from ISORROPIA.
In the ZONAL MEAN differences, list all species that changed by 10% or more: NO, ALK4, ISOP, MVK, MACR, PMN, PRPE, C3H8, N2O5, NH3, NIT, NITs, DST4, Br2, ISOPN, MOBA, HAC, GLYC, MMN, RIP, IEPOX
Comments on ZONAL MEAN differences:
  • Differences in isoprene related tracers can be attributed to changing biogenic emissions because we now force the MODIS LAI year to 2008.
  • Differences in NO, ALK4, C3H8, N2O5, NITs, DST4, Br2, are due to small number differences where concentrations are low.
  • Differences in NH3 and NIT can be attributed to numerical noise from ISORROPIA.
In the EMISSION RATIO maps, list all species that changed by 10% or more: ISOP, ACET, OC, PRPE, CO from monoterpenes
Comments on EMISSION RATIO differences:
  • Biogenic emissions differ because we now force the use of MODIS LAI for 2008 if the simulation year is beyond 2008. MODIS LAI for 2009 was used in the benchmark v9-02r w/ GEOS-FP met, but there are large differences in the 2009 file that still need to be investigated.
Additional or summary comments: We still need to determine what caused the changes in the MODIS LAI input files. As per our earlier discussion, we have put in an error trap in drydep_mod to make sure that the changes are only made for simulations using GEOS-FP and the Olson 2001 land map.
Approval
Requires further investigation: No
Approved by: Patrick Kim
Date of approval: 5 Feb 2014

--Melissa Sulprizio 12:16, 3 February 2014 (EST)

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