ECOCLIMAP, A GLOBAL DATABASE OF LAND SURFACE PARAMETERS AT 1KM RESOLUTION J.L. CHAMPEAUX, V. MASSON, F. CHAUVIN METEO-FRANCE/CNRM, 42, Av Coriolis, 31057.

ECOCLIMAP, A GLOBAL DATABASE OF LAND SURFACE PARAMETERS AT 1KM RESOLUTION  

 J.L. CHAMPEAUX , V. MASSON, F. CHAUVIN

METEO-FRANCE/CNRM, 42, Av Coriolis, 31057 Toulouse Cedex, FranceTph : (0)5 61 07 93 55, Fax : (0)5 61 07 96 26, email : [email protected]

  Mots-clé : Landcover,surface parameters, leaf area index, atmospheric models

Input parameters:

• depending on soil- Percentage of sand and clay- Soil depth

• depending on vegetation- Fraction of végétation (VEG)- Leaf area index (LAI)- Minimal stomatal resistance- Rugosity (Z0)

• dépending on soil and vegetation- Albedo- Emissivity

Atmospheric forcing

SVAT SCHEME

Temporal profilesNDVI

NOAA/AVHRRor SPOT/VGT

Land covermaps

Climate maps

225 ecosystems

Database ofof surfaceparameters

Soil types

Land cover map at 1km resolution (University of Maryland)

Corine Land cover over Europe at 250m resolution

Climate global map (Koeppe et de Lond, 1958)

différent crop types

Different woodland types

NDVI profiles (Wooded grassland, closed shrubland)

LAI=LAImin + (LAImax-LAImin) * (NDVI-NDVImin)/(NDVImax-NDVImin)

Leaf Area Index for July

Annual mean Albedo

Comparison LAI ECOCLIMAP(in Y-axis)andLAI in situ(in X-axis)

ComparisonLAI JuneBetweenECOCLIMAP

POLDER

and

ISCLSCP2

Daily Tmax Anomalies

10 years of simulation

by comparison

with the climatology

CRU(1961-1990)

for ECOCLIMAP

and the old database

Henderson-Sellers

Oldbase

Newbase

New -oldbase

Project: UPDATE ECOCLIMAP using GLC2000 landcover mapand Corine 2000 for Europe

Contribution of the GLC 2000 land cover map at global scale:- Consistent legend with LCCS classifiers- Good description of the different biomes- Real 1km resolution

The knowledge of regional experts will be very useful to specifythe surface parameters: fraction of vegetation, LAI ……..

THE DATABASE IS AVAILABLE ON THE WEB:

http://www.cnrm.meteo.fr/gmme/PROJETS/ECOCLIMAP/page_ecoclimap.htm

CONCLUSIONS:

• Global database of surface parameters at 1km resolution(minimum) complete, robust and et coherent

• Used in all the operational NWP and research models of Meteo-France: - ARPEGE CLIMAT - ARPEGE NWP - ALADIN - MESO-NH