GEOS-Chem v9-02 benchmark history

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On this page we have posted complete information about all benchmark simulations (both 1-month and 1-year) for GEOS-Chem v9-02.

1-year benchmarks

1-month benchmarks

v9-02b

Here is the assessment form for 1-month benchmark simulation v9-02b.

Description
New features added into GEOS-Chem:
Developer name(s) and institution(s):
  • Soil NOx: Rynda Hudman Kay (EPA); Neil Moore (formerly of Dalhousie); Bram Maasakkers (Eindhoven)
  • Bug fix in hdf_mod.F: Sajeev Philip (Dalhousie)
  • Tagged CO simulation fixes: Jenny Fisher (Wollongong); GEOS-Chem Support Team
  • Bug fix in nei_anthro_mod.F: Sajeev Philip (Dalhousie)
Version, resolution, met fields used: v9-02, GEOS-5 (47L), 4x5
1-month benchmark finished on: Wed Oct 24 16:10:25 EDT 2012
Performance statistics:
  • Ran on 8 CPUs of bench@titan-08.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:19
  • Scalability: 6.5256
Compared to previous benchmark: v9-02a
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): Soil NOx emissions
Plots may be viewed at: ftp://ftp.as.harvard.edu/pub/exchange/mpayer/1mo_quick_look/v9-02b/
Metrics
Global mean OH (from log file): 12.9398281506753 x 105 molec/cm3
Methyl chloroform lifetime: 4.8585 years
Did either of these change by more than 5%? No
At the SURFACE, list all species that changed by 10% or more: NOx, Ox, PAN, ALK4, ISOP, HNO3, H2O2, MEk, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, and OH
Comments on SURFACE differences: The changes are as expected. The new soil NOx parameterization significantly increases the NOx concentrations over North America, the southern part of South America, Central Asia and parts of Africa. Decreases occur over the northern part of South America, central Africa and Indonesia.

Other species are influenced by resulting changes in O3 (and consequently OH). However, some of the reported changes are mainly caused by noise since the absolute differences are very close to zero.

At 500 hPa, list all species that changed by 10% or more: NOx, PAN, ALK4, ISOP, HNO3, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, PRPE, N2O5, HNO4, MP, DMS, SO2, MSA, NH3, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, and OH
Comments on 500 hPa differences: See 'Comments on SURFACE differences'
In the ZONAL MEAN differences, list all species that changed by 10% or more: NOx, PAN, ISOP, HNO3, MEK, RCHO, MVK, MACR, PMN, PPN, PRPE, N2O5, HNO4, DMS, SO4s, NH3, NIT, NITs, Br, BrO, BrNO2, BrNO3 and OH.
Comments on ZONAL MEAN differences: See 'Comments on SURFACE differences'
In the EMISSION RATIO maps, list all species that changed by 10% or more: NOx fertilizer emissions and NOx soil emissions
Comments on EMISSION RATIO differences: The NOx soil emissions diagnostic now includes the NOx fertilizer emissions since the emissions related to fertilizer are now calculated using the same procedure as the “regular” soil emissions based on the biome emission coefficients. The soil NOx emission total increases with 0.310 Tg N to 1.028 Tg N for July.

The fertilizer emissions diagnostics gives the soil NOx emissions related to fertilizer use and deposited nitrogen.

Additional or summary comments: The occurring changes are as expected. The benchmark is performed using a new soil NOx restart file which saves per grid cell:
  • The Dry Period (hours)
  • Pulsing factor (unitless)
  • GWET from the previous timestep (unitless)
  • N reservoir from dry/wet deposition (ngN/m2)
Approval
Requires further investigation: TBD
Approved: TBD
Date of approval: TBD

--Melissa Payer 13:42, 24 October 2012 (EDT)

v9-02a

Here is the assessment form for 1-month benchmark simulation v9-02a.

Description
New features added into GEOS-Chem:
Developer name(s) and institution(s):
  • Sajeev Philip (Dalhousie)
Version, resolution, met fields used: v9-02, GEOS-5 (47L), 4x5
1-month benchmark finished on: Fri Oct 12 17:58:19 EDT 2012
Performance statistics:
  • Ran on 8 CPUs of bench@titan-10.as.harvard.edu (2.659 GHz x 8 CPU)
  • Wall time: 2:19
  • Scalability: 6.5621
Compared to previous benchmark: v9-01-03-Fix_for_IFORT12
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/pub/exchange/mpayer/1mo_quick_look/v9-02a/
Metrics
Global mean OH (from log file): 12.8727104044567 x 105 molec/cm3
Methyl chloroform lifetime: 4.8983 years
Did either of these change by more than 5%? No
At the SURFACE, list all species that changed by 10% or more: All species
Comments on SURFACE differences: Expected. Change in boundary layer mixing
At 500 hPa, list all species that changed by 10% or more: DST4, NITS, NH3, DMS, PRPE, MACR, ISOP (over Ocean) and NIT (over Land)
Comments on 500 hPa differences: Change in boundary layer mixing
In the ZONAL MEAN differences, list all species that changed by 10% or more: All species
Comments on ZONAL MEAN differences: Change in boundary layer mixing
In the EMISSION RATIO maps, list all species that changed by 10% or more: None
Comments on EMISSION RATIO differences: None
Additional or summary comments: None
Approval
Requires further investigation: No
Approved: Yes
Date of approval: Approved 16 Oct 2012

--Melissa Payer 12:00, 15 October 2012 (EDT)