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Remote sensing of the ocean from space Remote Sensing I Lecture 11 Summer 2006
Overview Sea surface temperature remote sensing Mapping of ocean colour –Biologic activity Remote sensing of sea surface height / topography from altimeters –El Nino detection –Deriving ocean circulation Remote sensing of sea surface roughness from scatterometers –Retrieving wind speed over the oceans
MODIS / Terra: Sea Surface Temperature Gulfstream
Ocean colour: MERIS/ENVISAT, 443 nm
Ocean colour: MERIS/ENVISAT, 560 nm
Ocean colour: MERIS/ENVISAT, Chlorophyll
El Nino: Schematic
El Nino Indices
AVHRR: Sea Surface Temperature Anomaly
TOPEX/POSEIDON: Sea Surface Height Anomaly
Altimeter principle: TOPEX/POSEIDON TOPEX/POSEIDON Launched: 10 Aug. 1992
Sea Surface Height: Assimilated from TOPEX from Stammer & Wunsch
Ocean velocity field: Assimilated from TOPEX from Stammer & Wunsch
Retrieving wind speed from altimeter: Principle from Elachi
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