Below is a list of all agreed upon parameters. Participating Centers are expected to produce output fields in GRIB2 data format and with consistent units. All units are defined by the WMO in the GRIB2 manual. For more information please refer to Guide to the WMO Table Driven Code Form (January 2003). A substantial number of amendments to GRIB Edition 2 were made at the Joint Meeting of CT-MTDCF/ET-DRC, Montreal, 8-12 May 2006.

Rules for parameter exchanges and GRIB2 encoding can be found here.

Pressure Level Parameters

The following parameters are available on eight pressure levels (1000, 925, 850, 700, 500, 300, 250 and 200 hPa) and in addition geopotential height is provided at 50 hPa.

Name	Abbreviation	Unit
Geopotential height	gh	gpm
Specific humidity	q	kg kg^-1
Temperature	t	K
U-velocity	u	m s^-1
V-velocity	v	m s^-1

Potential Temperature Level Parameters

The following parameter is available on Theta=320K.

Name	Abbreviation	Unit
Potential vorticity	pv	K m² kg^-1 s^-1

Potential Vorticity Level Parameters

The following parameters are available on the potential vorticity level 2 PVU.

Name	Abbreviation	Unit
Potential temperature	pt	K
U-velocity	u	m s^-1
V-velocity	v	m s^-1

Single Levels

The following parameters are available on single levels.

Name	Abbreviation	Unit
10 meter u-velocity	10u	m s^-1
10 meter v-velocity	10v	m s^-1
Convective available potential energy	cape	J kg^-1
Convective inhibition	ci	J kg^-1
Field capacity	cap	kg m^-3
Land-sea mask	lsm	Proportion
Mean sea level pressure	msl	Pa
Orography	orog	gpm
Skin temperature	skt	K
Snow depth water equivalent	sd	kg m^-2
Snow fall water equivalent	sf	kg m^-2
Soil moisture	sm	kg m^-3
Soil temperature	st	K
Sunshine duration	sund	s
Surface air dew point temperature	2d	K
Surface air maximum temperature	mx2t6	K
Surface air minimum temperature	mn2t6	K
Surface air temperature	2t	K
Surface pressure	sp	Pa
Time-integrated outgoing long wave radiation	ttr	W m^-2 s
Time-integrated surface latent heat flux	slhf	W m^-2 s
Time-integrated surface net solar radiation	ssr	W m^-2 s
Time-integrated surface net thermal radiation	str	W m^-2 s
Time-integrated surface sensible heat flux	sshf	W m^-2 s
Total cloud cover	tcc	%
Total column water	tcw	kg m^-2
Total precipitation	tp	kg m^-2
Wilting point	wilt	kg m^-3

02-09-2010