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Satellite determination of the mesoscale variability of the sea surface temperature

By Pierre-Yves Deschamps, Robert Frouin and Lucien Wald

Abstract

International audienceSatellite infrared data have been used to investigate the mesoscale variability of the SST (sea surface temperature) field. A statistical analysis of the SST field has been performed by means of the structure function. Results give the equivalent power-law exponent n of the spatial variance density spectrum E(k) ∼ k−h. The exponent n was found to vary from 1.5 to 2,3 with a mean value of 1.8 in the ]range of scales 3–100 km which is in agreement with previous one-dimensional analysis from shipborne and airborne measurements. These observed values of n are discussed and compared with the values predicted by turbulence theories

Topics: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing
Publisher: 'American Meteorological Society'
Year: 1981
OAI identifier: oai:HAL:hal-00464103v1
Provided by: HAL-MINES ParisTech
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