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Here we document the ERA5-Land dataset, which, eventually, will cover the same period as ERA5, January 1950 to near real time (NRT). ERA5-Land data released so far covers the period from 1981 to 2-3 months before the present. The back-extension from 1950 will start started production in late 2019 early 2020 with the release planned for Q2by Q3-Q3 2020. In addition, the facility to deliver timely updates is being implemented and it will be made available shortly. ERA5-Land timely updates (hereafter called ERA5-LandT) will be synchronized with the timely updates of the ERA5 climate reanalysis (ERA5T).

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Currently, the data can only be downloaded on a regular latitude/longitude grid of 0.1°x0.1° via the CDS catalogue. In the near future the data will also be made available in the native grid.

Land Surface Model 

NOTE: Please, note that since 1st Jan 2020 the new ECMWF Meteorological Interpolation and Regridding interpolation package (MIR) has been used to interpolate the atmospheric forcing of ERA5 into the ERA5-Land grid. While this change will be unnoticeable for the overwhelming majority of users, locally and under very limited conditions (some areas with high orography, some coastal points) some fields may suffer of a very small discontinuity this day.

Land Surface Model 

H-TESSEL is the land surface model that is the basis of ERA5-Land. The H-TESSEL version used in the production of ERA5-Land corresponds to H-TESSEL is the land surface model that is the basis of ERA5-Land. The H-TESSEL version used in the production of ERA5-Land corresponds to that of the IFS model documentation CY45R1.

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  • The hydrological parameters are in units of "m of water equivalent per forecast_step hours" and so they should be multiplied by 1000 to convert to kgm-2 per forecast_step hours or mm per forecast_step hours.
  • The energy (turbulent and radiative) and momentum fluxes should be divided by 60 x 60 x fc_step to convert to the units of Wm-2 and Nm-2 and Nm-2, respectively.

Data format

Surface fields in ERA5-Land are encoded either in GRIB1 or GRIB2 format. Tables 1 and 2 indicate the format for all parameters in ERA5-Land. Note that the retrieval of the data in NetCDF format is still possible via the CDS. 

The article "What are GRIB files" might be helpful.

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  • , respectively.

Data format

Surface fields in ERA5-Land are encoded either in GRIB1 or GRIB2 format. Tables 1 and 2 indicate the format for all parameters in ERA5-Land. Note that the retrieval of the data in NetCDF format is still possible via the CDS. 

The article "What are GRIB files" might be helpful.

Anchor
parameterlisting
parameterlisting
Parameter listings

Tables 1 and 2 below describe the surface parameters available in ERA5-Land (levtype=sfc). Information on all ECMWF parameters is available from the ECMWF parameter database.

For the sake of completeness, most of the forcing fields used to run ERA5-Land are included in the catalogue. Note, however, that these fields have purely been interpolated to the ERA5-Land grid and they are not obtained by running the land surface model. They are included in Table 1 and Table 2 below under the column "Used as forcing field"Tables 1 and 2 below describe the surface parameters available in ERA5-Land (levtype=sfc). Information on all ECMWF parameters is available from the ECMWF parameter database.

To download auxiliary land invariant parameters, please use ERA5 (see table1 of ERA5 documentation). The land-sea mask and orography (through the geopotential) fields used to produce the ERA5-Land dataset are also attached here below, already interpolated to a regular lat/lon grid of 0.1°x0.1°:

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name

units

shortName

paramId

an

fc

GRIB1GRIB2Used as forcing field
1

Lake mix-layer temperature

K

lmlt

228008

x


x

2

Lake mix-layer depth

m

lmld

228009

x


x

3

Lake bottom temperature

K

lblt

228010

x


x

4

Lake total layer temperature

K

ltlt

228011

x


x

5

Lake shape factor

dimensionless

lshf

228012

x


x

6

Lake ice temperature

K

lict

228013

x


x

7

Lake ice depth

m

licd

228014

x


x

8Snow cover%snowc260038
x
x
9Snow depthmsde3066
x
x
10

Snow albedo

(0 - 1)

asn

32

x


x

11

Snow density

kg m**-3

rsn

33

x


x

12

Volumetric soil water layer 11

m**3 m**-3

swvl1

39

x


x

13

Volumetric soil water layer 21

m**3 m**-3

swvl2

40

x


x

14

Volumetric soil water layer 31

m**3 m**-3

swvl3

41

x


x

15

Volumetric soil water layer 41

m**3 m**-3

swvl4

42

x


x

16

Leaf area index, low vegetation

m**2 m**-2

lai_lv

66


x

x

17

Leaf area index, high vegetation

m**2 m**-2

lai_hv

67


x

x

18

Surface pressure

Pa

sp

134


x

x
x
19

Soil temperature level 11

K

stl1

139

x


x

20

Snow depth

m of water equivalent

sd

141

x


x

21

10 metre U wind component

m s**-1

10u

165


x

x
x
22

10 metre V wind component

m s**-1

10v

166


x

x
x
23

2 metre temperature

K

2t

167


x

x

24

2 metre dewpoint temperature

K

2d

168


x

x

25

Soil temperature level 21

K

stl2

170

x


x

26

Soil temperature level 31

K

stl3

183

x


x

27

Skin reservoir content

m of water equivalent

src

198

x





28

Skin temperature

K

skt

235

x


x

29

Soil temperature level 41

K

stl4

236

x


x

30

Temperature of snow layer

K

tsn

238

x


x

31

Forecast albedo

(0 - 1)

fal

243


x

x

...


name

units

shortName

paramId

an

fc

GRIB1GRIB2Used as forcing field
1

Surface runoff

m

sro

8


x

x

2

Sub-surface runoff

m

ssro

9


x

x

3

Snow evaporation

m of water equivalent

es

44


x

x

4

Snowmelt

m of water equivalent

smlt

45


x

x

5

Snowfall

m of water equivalent

sf

144


x

x

6Surface sensible heat fluxJ m**-2sshf146
xx

7Surface latent heat fluxJ m**-2slhf147
xx

8Surface solar radiation downwardsJ m**-2ssrd169
xx
x
9Surface thermal radiation downwardsJ m**-2strd175
xx
x
10Surface net solar radiationJ m**-2ssr176
xx
x
11Surface net thermal radiationJ m**-2str177
xx
x
12

Evaporation

m of water equivalent

e

182


x

x

13

Runoff

m

ro

205


x

x

14

Total precipitation

m

tp

228


x

x
x
15Evaporation from the top of canopym of water equivalentevatc228100
x
x
16Evaporation from bare soilm of water equivalentevabs228101
x
x
17Evaporation from open water surfaces excluding oceansm of water equivalentevaow228102
x
x
18Evaporation from vegetation transpirationm of water equivalentevavt228103
x
x
19

Potential evaporation

m

pev

228251


x

x

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