1 3 rd CAMELS Meeting 11-12 November 2003 Nadine Gobron & Bernard Pinty presented by Peter Cox, with...
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Transcript of 1 3 rd CAMELS Meeting 11-12 November 2003 Nadine Gobron & Bernard Pinty presented by Peter Cox, with...
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
11-12 November 2003
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
11-12 November 2003
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
11-12 November 2003
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 ?