1. Remote sensing of the ocean from space Remote Sensing I Lecture 11 Summer 2006

2. 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

3. MODIS / Terra: Sea Surface Temperature Gulfstream

4. Ocean colour: MERIS/ENVISAT, 443 nm

5. Ocean colour: MERIS/ENVISAT, 560 nm

6. Ocean colour: MERIS/ENVISAT, Chlorophyll

7. El Nino: Schematic

8. El Nino Indices

9. AVHRR: Sea Surface Temperature Anomaly 1996 1997 1998

10. TOPEX/POSEIDON: Sea Surface Height Anomaly 1996 1997 1998

11. Ocean Topography

12. Altimeter principle: TOPEX/POSEIDON TOPEX/POSEIDON Launched: 10 Aug. 1992

13. Sea Surface Height: Assimilated from TOPEX from Stammer & Wunsch

14. Ocean velocity field: Assimilated from TOPEX from Stammer & Wunsch

15. Retrieving wind speed from altimeter: Principle from Elachi

16. Surface Winds from Scatterometer: QuickSCAT 21. Sep. 2005 Hurricane Rita