GEOS-Chem v9-01-03 benchmark history
From Geos-chem
On this page we have posted complete information about all benchmark simulations (both 1-month and 1-year) for GEOS-Chem v9-01-03.
Contents
v9-01-03d
Here is the assessment form for 1-month benchmark simulation v9-01-03d.
| Description | |
|---|---|
| New features added into GEOS-Chem: |
|
| Developer name(s) and institution(s): |
|
| Version, resolution, met fields used: | v9-01-03, GEOS-5 (47L), 4x5 |
| 1-month benchmark finished on: | Thu Dec 22 20:24:55 EST 2011 |
| Performance statistics: |
|
| Compared to previous benchmark: | v9-01-03c |
| 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): Sea salt emissions, Dust AOD |
| Plots may be viewed at: | ftp://ftp.as.harvard.edu/pub/exchange/mpayer/1mo_quick_look/v9-01-03d/ |
| Metrics | |
| Global mean OH (from log file): | 13.3186218315005 x 105 molec/cm3 |
| Methyl chloroform lifetime: | 4.7003 years |
| Did either of these change by more than 5%? | No |
| At the SURFACE, list all species that changed by 10% or more: | SALA, SALC, N2O5, HNO3, NIT, NITs, NH4, NH3, SO4s, HNO4, NOx, PAN |
| Comments on SURFACE differences: | Concentrations of sea salt aerosols (SALA and SALC) increase in the tropics by ~50-100% and decrease at mid-high latitudes by 50-100% as expected from the implementation of the SST dependent sea salt source function.
The impact on other species is largest for nitrogen and sulfur species that directly interact with sea salt. While the levels for some of these species change by factors of 1.5-2 over the tropical and high latitude oceans (HNO3, NIT, NITs, SO4s, NH3, NH4), their concentrations are very small in these remote regions, so the absolute changes are small. For example, HNO3 increases by more than a factor of 2 over the remote southern ocean, and decreases by a factor of 2 over the tropics. But the absolute changes are a few pptv at the surface. |
| At 500 hPa, list all species that changed by 10% or more: | SALA, SALC, SO4s, NH3, NIT, NITs |
| Comments on 500 hPa differences: | |
| In the ZONAL MEAN differences, list all species that changed by 10% or more: | SALA, SALC, HNO3, N2O5, HNO4, SO4s, NH4, NIT, NITs |
| Comments on ZONAL MEAN differences: | Most of the effects are concentrated near the surface, where the sea salt burden is highest. |
| In the EMISSION RATIO maps, list all species that changed by 10% or more: | SALA, SALC |
| Comments on EMISSION RATIO differences: | As expected from the inclusion of a SST dependence in the sea salt source function, sea salt emissions for accumulation mode sea salt aerosols (SALA) increase by 30-80% in warm tropical regions, and decrease by ~50% over high-latitudes. Overall SALA emissions decrease by 23%. Global emission of coarse mode sea salt aerosols (SALC) increase by 70%, with the largest increases in the tropics. This is driven by both the SST dependence but also the expansion of the size distribution of sea salt from 0.5-4 to 0.5-8 microns. |
| Additional or summary comments: | |
| Approval | |
| Requires further investigation: | TBD |
| Approved: | TBD |
| Date of approval: | TBD |
--Melissa Payer 14:39, 3 January 2012 (EST)
v9-01-03c
Here is the assessment form for 1-month benchmark simulation v9-01-03c.
| Description | |
|---|---|
| New features added into GEOS-Chem: | |
| Developer name(s) and institution(s): |
|
| Version, resolution, met fields used: | v9-01-03, GEOS-5 (47L), 4x5 |
| 1-month benchmark finished on: | Fri Dec 16 00:16:12 EST 2011 |
| Performance statistics: |
|
| Compared to previous benchmark: | v9-01-03b |
| 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/v9-01-03c/ |
| Metrics | |
| Global mean OH (from log file): | 13.3104192214225 x 105 molec/cm3 |
| Methyl chloroform lifetime: | 4.7056 years |
| Did either of these change by more than 5%? | No |
| At the SURFACE, list all species that changed by 10% or more: | PAN, ISOP, ALD2, RCHO, MVK, MACR, PMN, PPN, PRPE, CH2O, N2O5, MP, DMS |
| Comments on SURFACE differences: | The biggest difference were found for MVK and MACR, as they were not deposited in previous versions. The difference in HCHO is about 10%. The differences in organic nitrates are expected due to the supply of OVOCs. |
| At 500 hPa, list all species that changed by 10% or more: | ISOP, ALD2, RCHO, MVK, MACR, PMN, PRPE, N2O5, DMS, NH3, NIT |
| Comments on 500 hPa differences: | Expected. |
| In the ZONAL MEAN differences, list all species that changed by 10% or more: | MVK,MACR,PMN,NH3,NIT |
| Comments on ZONAL MEAN differences: | Expected. |
| In the EMISSION RATIO maps, list all species that changed by 10% or more: | None |
| Comments on EMISSION RATIO differences: | |
| Additional or summary comments: | The small increase in global mean OH is likely due to the small increase of NOx (similar pattern in the difference plots). |
| Approval | |
| Requires further investigation: | No |
| Approved: | Yes (Jingqiu Mao) |
| Date of approval: | 12-19-2011 |
--Melissa Payer 10:46, 19 December 2011 (EST)
v9-01-03b
Here is the assessment form for 1-month benchmark simulation v9-01-03b.
| Description | |
|---|---|
| New features added into GEOS-Chem: |
|
| Developer name(s) and institution(s): |
|
| Version, resolution, met fields used: | v9-01-03, GEOS-5 (47L), 4x5 |
| 1-month benchmark finished on: | Tue Dec 13 12:20:47 EST 2011 |
| Performance statistics: |
|
| Compared to previous benchmark: | v9-01-03a |
| 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/v9-01-03b/ |
| Metrics | |
| Global mean OH (from log file): | 13.2811407896285 x 105 molec/cm3 |
| Methyl chloroform lifetime: | 4.7161 years |
| Did either of these change by more than 5%? | No |
| At the SURFACE, list all species that changed by 10% or more: | PAN, ACET, R4N2 |
| Comments on SURFACE differences: | ACET generally decreases 10-50%, strongest decreases over the oceans due to elimination of the (incorrect) ocean source. Over continental regions, the largest changes are away from terrestrial acetone sources. There are smaller relative changes over the main continental emission regions. PAN decreases by 10-25% over most of the NH oceans, but the absolute differences are very small due to low surface PAN mixing ratios in these regions (< 30 pptv). Weak decreases for R4N2 in a couple spots. |
| At 500 hPa, list all species that changed by 10% or more: | ACET, R4N2 |
| Comments on 500 hPa differences: | ACET decreases of 10-25% over many regions at 500hPa. Weak decreases for R4N2 in a couple spots. |
| In the ZONAL MEAN differences, list all species that changed by 10% or more: | ACET, PAN |
| Comments on ZONAL MEAN differences: | Changes exceeding 10% for ACET and PAN, consistent with the above. |
| In the EMISSION RATIO maps, list all species that changed by 10% or more: | ACET |
| Comments on EMISSION RATIO differences: | Changes as expected based on emission updates. |
| Additional or summary comments: | |
| Approval | |
| Requires further investigation: | No |
| Approved: | Yes (--Dbm 11:17, 14 December 2011 (EST)) Yes (--[[User:Emily Fischer] 3:32, 14 December 2011 (EST)) |
| Date of approval: | 12-14-2011 |
--Melissa Payer 13:42, 13 December 2011 (EST)
--Bob Y. 17:06, 14 December 2011 (EST)
v9-01-03a
Here is the assessment form for 1-month benchmark simulation v9-01-03a.
| Description | |
|---|---|
| New features added into GEOS-Chem: | |
| Developer name(s) and institution(s): |
|
| Version, resolution, met fields used: | v9-01-03, GEOS-5 (47L), 4x5 |
| 1-month benchmark finished on: | Wed Dec 7 16:06:38 EST 2011 |
| Performance statistics: |
|
| Compared to previous benchmark: | v9-01-02s |
| 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/v9-01-03a/ |
| Metrics | |
| Global mean OH (from log file): | 13.2473124589166 x 105 molec/cm3 |
| Methyl chloroform lifetime: | 4.7300 years |
| Did either of these change by more than 5%? | No |
| At the SURFACE, list all species that changed by 10% or more: | PAN (downwind of South America), ALK4 over oceanic basins, ISOP downwind of South America, MEK tropics, MVK, MACR (downwind of South America), PMN, PPN, PRPE, N2O5, DMS |
| Comments on SURFACE differences: | Sort of makes sense. Changes are in regions that are NOx starved (South America) or cold (the loss from GLPAN will be greatest). Changes are small overall and almost always negative. The changes for DMS are relatively large (10-20% decrease) |
| At 500 hPa, list all species that changed by 10% or more: | ALK4, ISOP, MEK, MVK, MACR, PRPE (large changes in polar regions > 20%), DMS |
| Comments on 500 hPa differences: | Changes are generally bigger than at the surface (temperature dependence of GLPAN) |
| In the ZONAL MEAN differences, list all species that changed by 10% or more: | ISOP (but at high altitude and in polar regions), ALK4 in polar regions, MEK, MVK, MACR, PMN, PRPE |
| Comments on ZONAL MEAN differences: | Small changes overall (in an absolute sense). DMS has the largest change. |
| In the EMISSION RATIO maps, list all species that changed by 10% or more: | none |
| Comments on EMISSION RATIO differences: | |
| Additional or summary comments: | |
| Approval | |
| Requires further investigation: | No |
| Approved: | Yes |
| Date of approval: | Approved 08 Dec 2011 |
--Bob Y. 11:21, 8 December 2011 (EST)
--Melissa Payer 13:48, 13 December 2011 (EST)
