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Satellite Surveillance of Upwelling Along the East Coast of India

Upwelling process is allied with the primary productivity along the east coast of India. Coastal upwelling index (CUI) varies from 10–150 m3/s/100m of coastline length and is at its maximum during March and August. Spectral analysis of the CUI shows that the frequency ranges from 0.1–0.2 cycles/day, exhibiting a number of significant energy peaks. The presence of energy frequency ranging from 0.1–0.2 cycles/day is clearly evident especially for the Visakhapatnam and Chennai locations. Seasonal and synoptic variability of upwelling signatures is identified using satellite sea surface temperature during 2000–2003.