# Presentation: 251764

## BELMANIP:Benchmark Land Multisite Analysis and Intercomparison of Products

- F. Baret, J. Morissette, R. Fernandes, J.L. Champeaux, R. Myneni, J. Chen, S. Plummer, M. Weiss, C. Bacour

## Motivations

- The validation of biophysical products (LAI, fAPAR, fCover, albedo, ...) derived from medium resolution senors could be achieved by:
***direct comparison*** to ground measurements : absolute validation such as VALERI, MODLAND, BIGFOOT, CCRS, BSNR...
-  but requires important efforts
- therefore only few sites available
- Representativeness of the sites (time/space)
***Inter-comparison*** of products (algorithms, sensors)
- Does not require ground measurements and therefore allow to include a larger number of sites for a better temporal and spatial representativeness
**Requires a global coordination under CEOS for better efficiency**
- Propose a network of sites covering the whole earth surface and representing the several surface types and conditions
- Propose a common period for intercomparison
- Propose a standard format for cross comparison between products
- Propose a mechanism to share products extracts

- EGU-Vienna 28/04/2005

## Objectives

- Evaluate the representativeness of absolute validation sites
- Propose a network of sites for indirect evaluation: BELMANIP
- Inter-comparaison,
- Temporal consistency
- Internal consistency of products (LAI/albedo/fAPAR, ...)

- Representativeness based on ECOCLIMAP classification/climatology

- EGU-Vienna 28/04/2005

## Outlook

- ECOCLIMAP: brief presentation
- Main statistics  from ECOCLIMAP
- Representativeness of direct validation sites
- Building up BELMANIP network
- FLUXNET
- AERONET
- COMPLET
- Conclusion

- EGU-Vienna 28/04/2005

## ECOCLIMAP

**218 classes used including **
**	****90 for Europe (CORINE) and **
**	****128 pour le remaining world**
**1/120° resolution (about 1km at the equator)**

**15 biomes (cover map DCW, IGBP, CORINE, PELCOM)**

**16 climate types (Koeppe & De Long, 1958)**

- V. Masson, J. L. Champeaux, F. Chauvin, C. Meriguer, and R. Lacaze,
- "A global database of land surface parameters at 1km resolution in meteorological and climate models,"
*Journal of Climate*, 2003.

- EGU-Vienna 28/04/2005

## Statistics derived from ECOCLIMAP

- Map of the 7 dominant surface types
- Latitudinal distribution
- LAI distribution
- Heterogeneity of LAI

- EGU-Vienna 28/04/2005

## Map of dominant components

- The initial 15 surface types were grouped into 7 components
- Map of the dominant surface types at 1° 1° resolution

- EGU-Vienna 28/04/2005

## Latitudinal Distribution

- 1° de résolution in latitude

- 10° de résolution en latitude

- (/global area)

- (/emerged area)

- Importance of northern mid latitudes
- Importance of ‘grass’ et deserts

- EGU-Vienna 28/04/2005

## Annual average LAI map

- Large variability within a each of the 7 surface types

- EGU-Vienna 28/04/2005

## Statistical distribution of LAI

- =Maximal annual value

- EGU-Vienna 28/04/2005

## Seasonality (only continental surfaces)

**Time (Month)**

**Latitude**

**LAI**

- EGU-Vienna 28/04/2005

## Representativeness of direct validation sites (DIRECT)

- VALERI (27)
- CCRS (27)
- BIGFOOT (9)
- Others (35)
**TOTAL=100**

- GLOBAL

**DIRECT**

- EGU-Vienna 28/04/2005

## Distribution of LAI for ‘DIRECT’

**DIRECT**

**GLOBAL**

- (without bare surfaces)

**Average LAI values**

**Distribution of components**

- EGU-Vienna 28/04/2005

## Improving representativeness: BELMANIP

- Use of additional networks
- FLUXNET
- AERONET
- Eliminating replicates and sites with water >25% @ 88 km2
- Evaluation of the representativeness
- Adding sites to improve representativeness
- Surface types
- Latitudinal distribution
- Longitudinal distribution

- LAI

- EGU-Vienna 28/04/2005

## BELMANIP

- 100 DIRECT + 218 FLUXNET + 58 AERONET + 78 COMPLET= 377 BELMANIP

- EGU-Vienna 28/04/2005

## Latitudinale and surface types distribution

- GLOBAL

- BELMANIP

- EGU-Vienna 28/04/2005

## LAI distribution

- Global

- BELMANIP

- EGU-Vienna 28/04/2005

## CONCLUSION

-  Proposal for intercomparison network
-  Consensus between ‘producers’ to extract the BELMANIP sites
-  5050 km2 area
-  over 2003
-  share the extracts to improve efficiency
-  Possible (annual) update of the network to account for  new DIRECT sites

- EGU-Vienna 28/04/2005

## Example over one BELMANIP site

**MERIS**
**MODIS**
**CYCLOPES V1**
**ECOCLIMAP**

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## Example: internal consistencyLAI/fAPAR relationships

- EGU-Vienna 28/04/2005