ERA40 Model Resolution Gridded Surface, Vertical Integrals, and Other Single Level Fields from ECMWF

Surface and Near Surface Variables

There are 46 Surface and Near Surface variables described in terms of the ECMWF GRIB Code Table 128.

GRIB
Parameter
Code
Parameter NameDescriptionUnitsComments
27CVLLow vegetation cover(0-1)-
28CVHHigh vegetation cover(0-1)-
29TVLType of low vegetation-Table index
30TVHType of high vegetation-Table index
31CISea-ice cover(0-1)-
32ASNSnow albedo(0-1)-
33RSNSnow densitykg m**-3-
34SSTKSea surface temperatureK_
35ISTL1Ice surface temperature layer 1K-
36ISTL2Ice surface temperature layer 2K-
37ISTL3Ice surface temperature layer 3K-
38ISTL4Ice surface temperature layer 4K-
39SWVL1Volumetric soil water layer 1m**3 m**-3ECMWF has a description of the soil water units on their web site
40SWVL2Volumetric soil water layer 2m**3 m**-3ECMWF has a description of the soil water units on their web site
41SWVL3Volumetric soil water layer 3m**3 m**-3ECMWF has a description of the soil water units on their web site
42SWVL4Volumetric soil water layer 4m**3 m**-3ECMWF has a description of the soil water units on their web site
129ZGeopotentialm**2 s**-2At the surface - orography
136TCWTotal column waterkg m**-2Liquid + ice + vapour
137TCWVTotal column water vapourkg m**-2-
139STL1Soil temperature level 1KSoil temperature (ST) before 19930804
141SDSnow depthm of water equivalent-
148CHNKCharnock-Surface stress (SS) before 19980519
151MSLMean sea level pressurePa-
160SDORStandard deviation of orography--
161ISORAnisotropy of sub-gridscale orography--
162ANORAngle of sub-gridscale orographyrad-
163SLORSlope of sub-gridscale orography--
164TCCTotal cloud cover(0 - 1)-
16510U10 metre U wind componentm s**-1-
16610V10 metre V wind componentm s**-1-
1672T2 metre temperatureK-
1682D2 metre dewpoint temperatureK-
170STL2Soil temperature level 2KDeep soil temperature (DST) before 19930804
172LSMLand-sea mask(0, 1)-
173SRSurface roughnessm-
174ALAlbedo(0 - 1)-
183STL3Soil temperature level 3KClimatological deep soil temperature (CDST) before 19930804
186LCCLow cloud cover(0 - 1)-
187MCCMedium cloud cover(0 - 1)-
188HCCHigh cloud cover(0 - 1)-
198SRCSkin reservoir contentm of water-
206TCO3Total column ozonekg m**-2Before 20010612 was in Dobsons. 1 Dobson = 2.1415E-5 kg m**-2
234LSRHLogarithm of surface roughness length for heat-
235SKTSkin temperatureK-
236STL4Soil temperature level 4K-
238TSNTemperature of snow layerK-