Soil temperature top 20 cm

Name:

soil_temperature

Abbreviation:

st20

Unit:

K

Definition	The average soil temperature on the top 20cm of the soil layer.
Validity	Daily averaged
Comment	Computed from instantaneous values at 00, 06, 12 and 18Z- Sea points should be set as missing values.

Level
Type of first fixed surface	= 106	Depth below land surface m
Scale factor of first fixed surface	= 0
Scaled value of first fixed surface	= 0	0
Type of second fixed surface	= 106	Depth below land surface m
Scale factor of second fixed surface	= 1
Scaled value of second fixed surface	= 2	0.2 metre

Comment:

Author	Contents
Jörg Urban	ECMWFs has four soil layers: layer 1 from 0cm to 7cm, layer 2 from 7cm to 28cm, layer 3 from 28cm to 1m and layer 4 from 1m to 2.89m. The parameter soil temperature is then computed: st = ( 7 * T_1 + 13 * T_2 )/20, where T_i are the averaged soil temperatures on the i-th level.

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