upwelling comparative atlas physicals data from remote sensing d. dagorne

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