| Experiment 321 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Wed 1 Jan 1997 End: 0:00 UTC Thu 1 Jan 1998 |
Mon 3 Apr 2000 | GEOS1 | CHBr3 Bry | 144x91x37 | 0.121 hpa |
| Description | |||||
| Hybrid vertical coordinate with interface pressure set at 337 hPa. Five layers in the terrain-following region, 32 in the isobaric region. Approximately 800 m vertical resolution near the tropopause. CHBr3 is treated as an ocean surface source gas with constant, uniform emission rate 5 x 108 kg yr-1. Sinks are photolysis and destruction by OH with both J and [OH] from the 2DCTM and K given by DeMore et al. [1997]. Cloud mass flux and detrainment are included. Results are the basis for the JGR publication Nielsen and Douglass [2001]. | |||||
| Experiment 403 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Wed 1 Jan 1997 End: 0:00 UTC Thu 1 Jan 1998 |
Fri 7 Jul 2000 | GEOS1 | CO2 | 144x91x46 | 0.1 hpa |
| Description | |||||
| All levels terrain-following, identical to STRATF. CO2 surface exchange specified by Erickson, et al. [1996 JGR] and distributed throughout the two layers nearest the ground. Loss frequencies are specified by the 2DCTM version base8zg. Exp 403 is the second year of a two-year simulation. The initial condition at start of first year is 350 ppmv in the entire atmosphere. Cloud mass flux and detrainment are included. The smoothed and detrended time series of mixing ratios at Mauna Loa compare favorably to those from Erickson, et al. [1996] with a peak-to-peak amplitude of 7 ppmv with the maximum in late June and the minimum in late September. | |||||
| Experiment 405 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Mon 7 Dec 1998 End: 0:00 UTC Tue 21 Dec 1999 |
Tue 26 Sep 2000 | GEOS2 | CO2 | 144x91x70 | 0.01 hpa |
| Description | |||||
| All levels terrain-following, identical to TRMM02. CO2 surface exchange specified by TRANSCOM-3 with the 1995 fossil fuel and cement emission scenario. After the exchange with the layer nearest the surface is completed, CO2 is diffused throughout the local PBL by determining the mean mixing ratio in the PBL in a mass conserving manner. Loss frequencies are specified by the 2DCTM version base8zg. Exp 405 is the second year of a two-year simulation. The initial condition at start of first year is 350 ppmv in the entire atmosphere. Cloud mass flux and detrainment are included after the archived TRMM02 values are interpolated from their 36-layer standard pressure grid back onto the 70-layer terrain following grid. | |||||
| Experiment 411 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Dec 26, 1999 |
Sep 2001 | fvDAS | CO2 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The vertical coordinate is hybrid sigma-pressue as in fvGCM. CO2 surfac e exchange specified by TRANSCOM-3 with the fossil fuel and cement emi ssion, CO2 exchanges with the biosphere, and with the oceans. . An explicit PBL parameterization is applied to calculate the terbulence transport. The vertical diffusion coefficients from the fvDAS diagnostics (6-hour mean) are used to solve the diffusion equation. The convetive transport scheme was from S.J.Lin. The cloud mass flux and PBL height from the fvDAS diagnostics are used to calculate the convective transport. . Loss frequencies are speci fied by the 2DCTM version. Exp 411 is from an initial condition of homogenious 350 ppmv, and first runs 3 years for spin up, then get the 1998 1nd 1999 simulation. | |||||
| Experiment 413 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Jan 6, 1999, using repeatedly |
Sep 2001 | fvDAS | SF6 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The model is the same as in Exp. 411 as described briefly above. The surface flux data is from the TRANSCOM2. There is no loss in the atmosphere. The initial condition is a homogenious state of 2.06 pptv in SF6 concentration. The model runs 5 years, representing the years of 1989 through 1993. | |||||
| Experiment 414 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 0066 End: 0:00 UTC Jan 6, 0067, using repeatedly |
Oct 2001 | fvGCM | SF6 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The experiment is the same as in Exp. 413, except that the meteorological data is from the fvGCM output. It runs for 9 years. An important finding through Exp 413 and Exp414 is that the stratospheric mean air age is quite different with the fvDAS and fvGCM data. With the GCM data, the simulated mean air age is significantly longer than that with the DAS, and seems more realistic. | |||||
| Experiment 413.new | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Jan 6, 1999, using repeatedly |
Apr 2002 | fvDAS | SF6 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The experiment design and the meteorological data are the same as in Exp 413. The only difference is the model. the model (the GSFC PCTM) has been improved to enhance the accuracy and to ensure mass conservation. Results show improvement in the simulated SF6 distribution compared to that of Exp 413. | |||||
| Experiment 411.new | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Dec 26, 1999 |
Apr 2002 | fvDAS | CO2 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The experiment design and the meteorological data are the same as in Exp 411. The only difference is the model. the model (the GSFC PCTM) has been improved to enhance the accuracy and to ensure mass conservation. Results show improvement in the simulated CO2 distribution compared to that of Exp 411. | |||||
| Experiment 411.veg, ocn, and fos | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Dec 26, 1999 |
Jun 2002 | fvDAS | CO2 | 144x91x25 | 0.01 hpa |
| Description | |||||
| The experiment design and the meteorological data are the same as in Exp 411.new. The only difference is the forcing field. The CO2 surface flux is separated as terrestrial biosphere (VEG), oceans (OCN) and fossil fuel combustion (FOS) respectively. The purpose is to see the separate contributions of the sources to the atmospheric CO2. | |||||
| Experiment 416 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1992 End: 0:00 UTC Jul 13, 1997 |
Dec 2001 | UKMO | a passive tracer | 96x72x28 | 0.01 hpa |
| Description | |||||
| The purpose of this experiment is to examine the stratospheric mean air age simulated with the UKMO assimilated winds. The surface preesure is not given by the UKMO data but calculated with the surface topography. The results show that the air age is much too young in the simulated stratosphere. The model used for this experiment is the original PCTM. | |||||
| Experiment 417 | |||||
|---|---|---|---|---|---|
| Dates/Length | Run date | Dynamics | Constituents | Mesh | Lid |
| Begin: 0:00 UTC Jan 1, 1998 End: 0:00 UTC Dec31, 1999 |
Jun 2002 | fvDAS | CO2 | 144x91x25 | 0.01 hpa |
| Description | |||||
| This is to simulate the impact of biomass burning on CO2 distribution and CO2 budget. The biomass burning data is from Jennifer Logan. The reference is Andreae, M.O., and Merlet, P., Emissions of trace gases and aerosols from biomass burning, Global Biogeochem. Cycles, 15, 955-966, 2001. | |||||