11-12 November 2003

13rd CAMELS Meeting

Nadine Gobron & Bernard Pintypresented by Peter Cox, with no french accent

The JRC contribution to CAMELS:Dataset of fAPAR products

11-12 November 2003

23rd CAMELS Meeting

Expected Deliverables

1. 10-days composite fAPAR over some CarboEurope sites from 1998-2001

2. Global monthly composite of spatially aggregated at 10 km x 10 km and 0.5 ° x 0.5° in latitude-longitude

11-12 November 2003

33rd CAMELS Meeting

10-days fAPAR over 11 CarboEurope sites from Sep. 1997 to Dec. 2001

• This task was achieved on August 2003

fAPAR & associated products; & software to read/access products;

& documentations

were delivered to Galina Churkina (they should be available under the CarboData web site this month).

Done

Task 1

11-12 November 2003

43rd CAMELS Meeting

How are they organized?

• fAPAR time series in a 30 x 30 km window centered around the Carbodata sites

• IDL code to read

• pdf file for each site which contains …

Task 1

11-12 November 2003

53rd CAMELS Meeting

Documentation file describes

Name of Site

Geographical coordinates

Country

Location of the Site

Task 1

Ref: Gobron et. al. (2003) ‘European Vegetation Activity from Space’, CarboEurope Sites, IES, EUR 20764 EN.

11-12 November 2003

63rd CAMELS Meeting

10-days time series Monthly time seriesOverview of 4 Years time series

Task 1

11-12 November 2003

73rd CAMELS Meeting

Histogram and statistics using 10-day (top) and

monthly (bottom) FAPAR time series from 1998 to 2001

spatially averaged over 3 x 3 pixels over the

central pixel.

Task 1

11-12 November 2003

83rd CAMELS Meeting

At the central pixel

Averaged over

3 x 3 pixels

9 x 9 pixels

Single year analysis Task 1

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93rd CAMELS Meeting

Information associated with the spatial averaging procedure

Limited variations between time-series illustrate ‘spatially homogeneous surfaces’ wrt the

fAPAR product

Task 1

11-12 November 2003

103rd CAMELS Meeting

• To provide an extra piece of code to facilitate the reading of FAPAR time series when data are missing over the full window (Action on NG)

• Additional sites to be extracted (Action on CAMELS drivers: which sites are their highest priorities ?)

10-days fAPAR over CarboEurope sites from Sep. 1997 to Dec. 2001

To be Done

Task 1

11-12 November 2003

113rd CAMELS Meeting

Global monthly composite spatially aggregated

• A preliminary version of the software has been developed and is currently under testing.

• It delivers series of products at multiple spatial resolutions, for example :

10 x 10 km & 0.5 X 0.5 degrees

Task 2

Done

11-12 November 2003

123rd CAMELS Meeting

Contents of the file for the monthly composite spatially aggregated @ 0.5 x 0.5 degrees

Task 2

Number of original pixels

inside the aggregated one

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133rd CAMELS Meeting

Example of the global fAPAR monthly composite spatially aggregated @ 0.5° x 0.5°

Task 2

June 2000

0. 0.5 1.0

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143rd CAMELS Meeting

Example (30 % reduced) of the global monthly composite spatially aggregated @ 10 x 10 km : fAPAR

Task 2

June 2000 0. 0.5 1.0

11-12 November 2003

153rd CAMELS Meeting

Example (100%) of the

global monthly composite

spatially aggregated @

10 x 10 km

Task 2

June 2000

0. 0.5 1.0

11-12 November 2003

163rd CAMELS Meeting

Global monthly composite of spatially aggregated

Task 2

To be Done

• Check all elements of the software (January/February 2004)

•Finalize the content and format of the file (require CAMELS inputs: what additional fields are useful?)

•Apply on Year 2001 and deliver to CAMELS for testing

11-12 November 2003

173rd CAMELS Meeting

What else ??

• Is there any specific well-identified request from CAMELS that is not yet covered?

• How are we (JRC), in practice, associated to the scientific interpretation of these products ?

• What are the benefits of the fAPAR products and how do we evaluate them ?