The JRC contribution to CAMELS: Dataset of fAPAR products

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The JRC contribution to CAMELSDataset of fAPAR
products
Nadine Gobron Bernard Pinty presented by Peter
Cox, with no french accent
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Expected Deliverables

• 10-days composite fAPAR over some CarboEurope
  sites from 1998-2001
• Global monthly composite of spatially aggregated
  at 10 km x 10 km and 0.5 x 0.5 in
  latitude-longitude

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10-days fAPAR over 11 CarboEurope sites from Sep.
1997 to Dec. 2001
Task 1
Done

• 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).

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How are they organized?
Task 1

• 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

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Documentation file describes
Task 1
Name of Site Geographical coordinates Country
Location of the Site
Ref Gobron et. al. (2003) European Vegetation
Activity from Space, CarboEurope Sites, IES, EUR
20764 EN.
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Overview of 4 Years time series
Task 1
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Task 1
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.
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Single year analysis
Task 1
At the central pixel Averaged over 3 x 3
pixels 9 x 9 pixels
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Information associated with the spatial averaging
procedure
Task 1
Limited variations between time-series illustrate
spatially homogeneous surfaces wrt the fAPAR
product
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Task 1
10-days fAPAR over CarboEurope sites from Sep.
1997 to Dec. 2001
To be Done

• 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 ?)

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Global monthly composite spatially aggregated
Task 2
Done

• 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

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Contents of the file for the monthly composite
spatially aggregated _at_ 0.5 x 0.5 degrees
Task 2
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Example of the global fAPAR monthly composite
spatially aggregated _at_ 0.5 x 0.5
Task 2
June 2000
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Example (30 reduced) of the global monthly
composite spatially aggregated _at_ 10 x 10 km
fAPAR
Task 2
June 2000
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Example (100) of the global monthly composite
spatially aggregated _at_ 10 x 10 km
Task 2
June 2000
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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

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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 ?