ecoclimap, a global database of land surface parameters at 1km resolution j.l. champeaux, v. masson,...
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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