remote sensing of the ocean from space remote sensing i lecture 11 summer 2006
TRANSCRIPT
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Remote sensing of the ocean from space
Remote Sensing I
Lecture 11
Summer 2006
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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
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MODIS / Terra: Sea Surface Temperature
Gulfstream
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Ocean colour: MERIS/ENVISAT, 443 nm
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Ocean colour: MERIS/ENVISAT, 560 nm
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Ocean colour: MERIS/ENVISAT, Chlorophyll
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El Nino: Schematic
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El Nino Indices
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AVHRR: Sea Surface Temperature Anomaly
1996
1997
1998
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TOPEX/POSEIDON: Sea Surface Height Anomaly
1996
1997
1998
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Ocean Topography
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Altimeter principle: TOPEX/POSEIDON
TOPEX/POSEIDONLaunched:10 Aug. 1992
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Sea Surface Height: Assimilated from TOPEX
from Stammer & Wunsch
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Ocean velocity field: Assimilated from TOPEX
from Stammer & Wunsch
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Retrieving wind speed from altimeter: Principle
from Elachi
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Surface Winds from Scatterometer: QuickSCAT
21. Sep. 2005Hurricane Rita