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UPWELLING COMPARATIVE ATLAS
PHYSICALS DATA
FROM REMOTE SENSING
D. DAGORNE
IRD – Centre de Bretagne
US025 : Interventions et à la Mer et Observatoires Océaniques
Context : UR097 / ECO-UP
-Comparative Atlas . Upwelling ecosystem functionning by comparison of statics and dynamics elements from « historical » existing data.
data worksheet and graphics
animated or fixed images from observations and modeling
synthetics indexes
- Operationnal « server » for data in near real time (NRT : few days or week ) providing caracteristics indexes of ecosystem state .
Beginning by products from remote sensing (satellites imagery) :
SST(s) - CHL - wind - ( altimetry) and derived indexes.
Fixed and animated plots and maps from climatologies, NRT data, anomalies and indexes to quantified present upwelling state and historical evolution.
Simulation results for forecast.
Others IRD requirements
-Oceanic observatory from satellite for different research units
Atlantic Ocean ( African Monsoon experiment) : Guinea Gulf
Indian Ocean – Mozambique channel
Western Atlantic – Amazon/Carabiean
-Oceanograhics cruises survey ( with data distribution « on board » )
EGEE in Guinea Gulf ( may/jun and september/october 2005 - 2007)
Indian Ocean ( in january-february 2007)
-Educationnal and training projects for developping countries.
data – « know how » (software) – RT acquisition & preprocessing
Data from Level 3 (bio-geophysical products)
by remote sensing « providers »
measurement quality
spatio-temporal resolution and granularity ( « composite » time)
beginning-ending period, ..
« real time » accessibility - new facilities :
Sea Surface Temperature (SST)
Sea Surface Reflectance (SSR or « Color »)
Wind : modulus / direction
Altimetry
Others : Water Vapour – radiative (SSI/DLI) and turbulent (LHF/SHF) fluxes
precipitations (poor resolution) – salinity ( 2008 ??)
-SST from Infra-red ( clouds !! : detection – boundaries (in upw areas ) )
Polar orbiting ( 2 pass ( day-night) by day )
AVHRR/TIROS-N/NOAA 1985 – 2003 (2005) PathFinder V4 (9km) / V5 (4km) – MODIS/EOS/NASA ( ACQUA) : 07/2002 - present ( with SSR)
twice daily ( PFV5) / 3 days (MODIS) / weekly / monthly / clim
Geosynchronous
Eastern Atlantic : Meteosat (MSG) EUMETSAT - 07/2004
Western Atlantic – South East Pacific : GOES -NOAA : 2002
hourly – daily « composite » (3H -12H – 24H) - 10 / 5 km
- SST From Micro-Wave (*) (low resolution : 25 km – continental/island areas )
TMI : 01/1998 ( 40 deg latitude limit) - AMSR/E : 07/2004
daily / 3 days / weekly / monthly / clim
(*) and others products : IWV (integrated Water Vapour) – WSP (Wind Speed)
- Sea Surface Reflectance
from narrow band visible spectrum (day) observation - polar orbiter (1 / day )
daily ( ?) / 3 days ( MODIS) / weekly / month / clim
- NLW : Normalized Leaving Water irradiance band
heavy constraints effects : Clouds - aerosols – WV - angles (sun, view)
- « standards » bio-optical products : CHLa - Absortion Coef (K490) - .
- «experimental» developpement : CDOM/SM – «regional» CHLa – FLH/PP
SeaWIFS 9km : 01/1998 – 12/2004 - / MODIS (with SST) 4 km : 07/2002
CZCS ( pathwork areas :.. 1978-1984)
-Wind retrievial from scaterrometer on polar orbiter ( 2 orb / day )
-ERS (ESA) 1992- 2002 ; 1deg - QuickScat (NASA) : 1999-present : 0.25 /0.5deg
« Mean » Wind Fields by « interpolation » 1 day /3 days / week / month
- Altimetry from Topex/Poseidon « merged » product ( CLS) – weekly
SLA : Sea Level Anomaly – ADT : Absolute Dynamic Topography
-Working steps
Sate of « art » : providers , quality, data format, software,..
acces / archiving all the usefull data
extraction software for various sources (format)
area-period data (3D cube : lat-lon-tim) in netCDF
analysis software : interactive wiewing , « QuickLook » production
multitemporal analysis (EOF,..), plot – time/space diagram
indexes ( with cartographic requierement : bathy)
WEB « navigation »
historical data : climatologies – monthly and anomalies
Automatic Daily Near Real Time on somes areas
‘UPWelling Atlas » ( C. Mullon)
Next : historical and NRT indexes extraction
generic approach software tools for « users» requirements
data (format – area – period) – analysis
UPWELLING ATLAS
Period : 1998/01 - 2004/12 ( SST PFV4 : 1995 - SLA : 1992)
Climatologies – Monthly ( Anomalies ) - Weekly (octad)
SST : TMI (remss) - AVHRR/PFV4-V5 (NASA/PO-DAAC)
CHLA : SEAWIFS ( NASA/GSFC ocean color )
WIND : MWF QuickScat (IFREMER/CERSAT)
SLA : merged T/P ( CLS )
NEAR REAL TIME daily
Huge work !!.. Beginning 2005/10 .. In progress
SST : TMI -3 D (1D) – MODIS-3D (1D)
MSG/GOES hourly - 12H night composite (EUMETSAT-SAFO)
CHLA : MODIS-3D
WIND : QS-3D (1D - twice) (remsss - NRT facilities)
UPWELLING AREAS – global areas
40 deg lat – 25 deg lon extension
« QUICK-LOOK » FILE – (MONTHLY- WEEKLY) / ANIMATION
WEB SCREEN SNAPSHOT – MONTH 4PAR
WEB SCREEN SNAPSHOT - MONTH 4ZON
Near Real Time
Day-1 / Day-2
« global »
Upwelling areas
Next slide
Local areas
INTERACTIVE SOFTWARE ANALYSIS TOOLS – ex SLA
NEAR REAL TIME – MODIS SST-CHL DAILY PROCESSING
From level 2 (1 km) swath data - 2006/11/25