These variables are described in terms of the ECMWF GRIB Code Table 128.

The accumulation period for all of the accumulated fields in this dataset is 6 hours starting at the analysis time. To compute instantaneous values for the accumulation fields, divide all data values by 21,600 seconds.

GRIB Parameter Code	Parameter Name	Description	Units	Comments
142	LSP	Stratiform precipitation (Large scale precipitation)	m	Accumulated field
143	CP	Convective precipitation	m	Accumulated field
144	SF	Snowfall (convective + stratiform)	m of water equivalent	Accumulated field
146	SSHF	Surface sensible heat flux	W m**-2 s	Accumulated field
147	SLHF	Surface latent heat flux	W m**-2 s	Accumulated field
159	BLH	Boundary layer height	m	-
169	SSRD	Surface solar radiation downwards	W m**-2 s	Accumulated field
175	STRD	Surface thermal radiation downwards	W m**-2 s	Accumulated field
176	SSR	Surface solar radiation	W m**-2 s	Accumulated field
177	STR	Surface thermal radiation	W m**-2 s	Accumulated field
178	TSR	Top solar radiation	W m**-2 s	Accumulated field
179	TTR	Top thermal radiation	W m**-2 s	Accumulated field
180	EWSS	East-West surface stress	N m**-2 s	Accumulated field
181	NSSS	North-South surface stress	N m**-2 s	Accumulated field
182	E	Evaporation	m of water	Accumulated field
195	LGWS	Latitudinal component of gravity wave stress	N m**-2 s	Accumulated field
196	MGWS	Meridional component of gravity wave stress	N m**-2 s	Accumulated field
205	RO	Runoff	m	Accumulated field
208	TSRC	Top net solar radiation, clear sky	W m**-2	Accumulated field
209	TTRC	Top net thermal radiation, clear sky	W m**-2	Accumulated field
210	SSRC	Surface net solar radiation, clear sky	W m**-2	Accumulated field
211	STRC	Surface net thermal radiation, clear sky	W m**-2	Accumulated field
229	IEWS	Instantaneous X surface stress	N m**-2	-
230	INSS	Instantaneous Y surface stress	N m**-2	-
232	IE	Instantaneous moisture flux	kg m**-2 s	Evaporation
44	ES	Snow evaporation	m of water	Accumulated field
45	SMLT	Snowmelt	m of water	Accumulated field