List of GEOS-4 met fields

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GMAO no longer produces GEOS-4 data. But you can still run GEOS-Chem simulations using our 20-year archive of GEOS-4 meteorology.

The current GMAO met data product is now the GEOS-FP operational product, which is supported in GEOS-Chem v9-02 and higher versions. We are processing GEOS-FP data for 2012 up to present day. You will be able to use GEOS-FP for both global and hi-res (0.25° x 0.3125°) nested-grid simulations starting with GEOS-Chem v9-02.

On this page we list the GMAO GEOS-4 met fields that are currently archived for use with GEOS-Chem. This is only a subset of the entire GEOS-4 met field data archive.

For the latest information about GEOS-4, please consult the following resources:

A-3 Fields

  • These are 3-hr time-averaged fields.
  • Data times: 01:30, 04:30, 07:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT
  • All A-3 fields are 2-dimensional (lon,lat)
GEOS-4 Field Description Units GEOS-5 Equivalent
ALBEDO 2-D surface albedo unitless ALBEDO
CLDFRC 2-D column cloud fraction fraction CLDTOT
GWETTOP 2-D top soil moisture fraction GWETTOP
HFLUX 2-D sensible heat flux W/m2 HFLUX
LAI 2-D leaf area index  % LAI
PARDF 2-D diffuse photosyn active rad W/m2 PARDF
PARDR 2-D direct photosyn active rad W/m2 PARDR
PBLH 2-D PBL thickness m PBLH
PREACC 2-D total precipitation @ ground mm/day PRECTOT
PRECON 2-D total convective precip @ ground mm/day PRECCON
RADLWG 2-D net longwave radiation @ ground W/m2 LWGNET
RADSWG 2-D net shortwave rad @ ground W/m2 SWGNET
SNOW 2-D snow depth (H2O equivalent mm H2O SNOMAS
T2M 2-D air temperature @ 2m above ground K T2M
TSKIN 2-D ground (skin) temperature K TSKIN
U10M 2-D U-wind @ 10m above ground m/s U10M
USTAR 2-D Friction velocity m/s USTAR
V10M 2-D V-wind @ 10m above ground m/s V10M
Z0M 2-D Roughness height m Z0M

--Melissa Sulprizio 14:16, 15 April 2015 (EDT)

A-6 Fields

  • These are 6-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)
GEOS-4 Field Description Units GEOS-5 Equivalent
CLDTOT 3-D cloud fraction (conv + large scale) unitless CLOUD
HKBETA 3-D Hack overshoot parameter unitless none
HKETA 3-D Hack convective mass flux unitless none
MOISTQ 3-D overall tendency of specific humidity g/kg/day MOISTQ
OPTDEPTH 3-D overall optical depth unitless OPTDEPTH
Q 3-D specific humidity g/kg QV
T 3-D temperature K T
U 3-D zonal wind m/s U
V 3-D meridional wind m/s V
ZMEU 3-D Zhang-McFarlane updraft entrainment Pa/s none
ZMMD 3-D Zhang-McFarlane downdraft mass flux Pa/s none
ZMMU 3-D hang-McFarlane updraft mass flux Pa/s none

--Melissa Sulprizio 14:16, 15 April 2015 (EDT)

I-6 Fields

  • These are instantaneous 6-hr fields.
  • Data times: 00:00, 06:00, 12:00, 18:00 GMT
  • All I-6 fields are 2-dimensional (lon,lat)
GEOS-4 Field Description Units GEOS-5 Equivalent
LWI 2-D land / water / ice flags unitless LWI
PHIS 2-D surface geopotential heights m2/s2 PHIS
PS 2-D surface pressure hPa PS
SLP 2-D sea level pressure hPa SLP

--Melissa Sulprizio 14:16, 15 April 2015 (EDT)