Optimization of PISCES

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Optimization of PISCES
Goal for 2009 Development of an assimilation
method to improve PISCES by using new Ocean Color
data (coll. LOCEAN) Kane, Thèse CIFRE 2007-2009
Chazottes, Postdoc CarbOcean 2007-2008 Bleuyard,
CDD CNES 2007-2009
SEAWIFS
PISCES
Chloro Satellite
Chloro PISCES
Fréquence annuelle dapparition des diatomées
(Bopp et al., 2005)
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MERCATOR and CO2
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Toward an operational  marine pCO2 satellite
product 

• How to validate MERCATOR CO2 simulations? No
  global satellite product available
• Within CarboOcean, we have shown that the pCO2
  can be estimated using 3 parameters SST, CHL and
  MLD.
• Two of them are measured from space!

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Toward an operational  marine pCO2 satellite
product 

• It would be possible to generate a CO2 product
  (pCO2 or flux) in quasi real-time by combining
  MODIS data (SST,CHL) with Mercator simulations
  (MLD).
• Might be of interest for people who are doing
  atmospheric inversions.

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GLOBPHY Analysis of decadal changes in the
global ocean phytoplankton through the use of
satellite data and 3D-model 3-year project
funded by the French ANR (2006-2008)
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GOAL Identification and interpretation of
decadal changes in ocean color data We are
involved in 1 Building a consistent satellite
CHL archive starting from 1979 (CZCS, SeaWiFS,
MERIS, MODIS) using a specific atmospheric
correction algo. 2 Retrieving new (and
pertinent) parameters using satellite data (PFTs,
IOPs). 3 Comparing decadal trends found in
long-term 3-D ORCA/PISCES simulations with those
observed in Ocean Color data.
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PHYSAT

• First method to detect phytoplankton species at
  the global scale
• Rely on the analyse of nLw anomalies
• Need more validation
• A great tool to detect the impact of climate
  change on marine ecosystems!

SEAWIFS Janvier 2001
Haptophytes
SLC
Prochlorococcus
Diatoms
S. Alvain, Thèse, 2005
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Is PHYSAT applicable to CZCS?
PHYSAT 3-bands (CZCS-like)
SeaWiFS June 2001
PHYSAT (standard)
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Is PHYSAT applicable to CZCS?
PHYSAT 3-bands (CZCS-like)
SeaWiFS Dec. 2001
PHYSAT (standard)
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Recent improvement the CDOM correction
June 2001
Standard
New
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Recent improvement the CDOM correction
December 2001
Standard
New
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People involved

• Séverine Alvain (Postdoc EurOceans in Norwich 1
  yr)
• PHYSAT improvements and validation
• Adaptation to CZCS and OCTS
• A new Postdoc (GlobPhy 2 yrs) at LSCE
• Search for trends in both datasets
• Comparison of satellite and model over the last
  20 years