List of GCAP met fields
NOTE: GCAP in the standard GEOS-Chem is mostly obsolete. Most simulations using the GCAP meteorology are now performed with the ICECAP model. This is a separate code base in which the GISS Model E dynamics have been integrated into GEOS-Chem.
Here is a description of the GCAP met fields. These are saved out from the GISS-GCM and can be used to drive GEOS-Chem simulations for the GCAP project.
A-3 Fields
- These are 3-hr time-averaged fields.
- Data times: 1:30, 4:30, 7:30, ..., 22:30 GMT
- All A-3 fields are 2-dimensional (lon,lat)
| GCAP Field | Description | Units |
|---|---|---|
| ALBEDO | 2-D surface albedo | unitless (=0 over dark areas) |
| PREACC | 2-D total precipitation | mm/day |
| PRECON | 2-D convective precipitation | mm H2O/day |
| TS | 2-D surface temperature | K |
| MOLENGTH | 2-D Monin-Obukhov length | m |
| USTAR | 2-D friction velocity | m/s |
| PBL | 2-D boundary layer height | m |
| RADSWG | 2-D incident radiation at ground | W/m2 |
| SNICE | 2-D fraction of box covered with snow or land or ocean ice | unitless |
| OICE | 2-D ocean or lake ice fraction | unitless |
| USS | 2-D U-wind @ 10m above ground | m/s |
| VSS | 2-D V-wind @ 10m above ground | m/s |
| SOIL | 2-D volumetric water content | m3/m3 |
| SNOWD | 2-D snow depth | mm |
| PARDIR | 2-D direct photosynthetically active radiation | W/m2 |
| PARDIF | 2-D diffusive photosynthetically active radiation | W/m2 |
NOTE: The albedo is calculated only when sunlight is shining. During a dark timestep, the program "remembers" the albedo from the previous timestep. The problem is that some places are in continuous night.
--Melissa Sulprizio 14:32, 15 April 2015 (EDT)
A-6 Fields
- These are 3-hr time-averaged fields.
- Data times: 00:00, 06:00, 12:00, 18:00 GMT
- All A-6 fields are 3-dimensional (lon,lat,alt)
| GCAP FIELD | Description | Units |
|---|---|---|
| T | 3-D temperature | K |
| U | 3-D zonal wind | m/s |
| V | 3-D meridional wind | m/s |
| OPTDEPTH | 3-D optical depth | unitless (=0 above layer 13) |
| CLDF | 3-D cloud fraction | unitless (=0 above layer 13) |
| Q | 3-D specific humidity | kg H2O/kg air |
| MOISTQ | 3-D tendency of specific humdity (q) w/r/t precip. | g H2O/kg air/day |
| UPDE | 3-D convective updraft flux | Pa/s |
| DNDE | 3-D convective downdraft flux | Pa/s |
| ENTRAIN | 3-D convective entrainment | Pa/s |
| DETRAINE | 3-D convective detrainment | Pa/s |
| UPDN | 3-D convective updraft flux (for non-entraining plume) | Pa/s |
| DNDN | 3-D convective downdraft flux (for non-entraining plume) | Pa/s |
| DETRAINN | 3-D convective detrainment (for non-entraining plume) | Pa/s |
--Melissa Sulprizio 14:32, 15 April 2015 (EDT)
I-6 fields
- These are 3-hr time-averaged fields.
- Data times: 00:00, 06:00, 12:00, 18:00 GMT
- All I-6 fields are 2-dimensional (lon,lat)
| GCAP Field | Description | Units |
|---|---|---|
| PS | 2-D surface pressure | hPa |
| SLP | 2-D sea level pressure | hPa |
--Melissa Sulprizio 14:32, 15 April 2015 (EDT)
Constant fields
- These are time-invariant fields
- Constant fields are 2-dimensional (lon,lat)
| GCAP Field | Description | Units |
|---|---|---|
| PHIS | 3-D surface geopotential height | m2/s2 |
| LWI | 2-D land fraction | fraction |
--Melissa Sulprizio 14:32, 15 April 2015 (EDT)
