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Spatial and Temporal Variations of Internal Waves in the South China Sea

Weigen Huang(1), Johnny Johannessen(2) and Werner Alpers(3)

(1) Second Institute of Oceanography, State Oceanic Ad, 36 North Bao Shu Road, 310012, Hangzhou, China
(2) Nansen Environmental and Remote Sensing Center, Thormoehlensgate 47, N-5006, Bergen, Norway
(3) University of Hamburg, Dundesstrasse 53, D-20146, Hamburg, Germany

Abstract

Expressions of internal waves are frequently manifested in synthetic aperture radar (SAR) images from the South China Sea. Using sequences of such SAR images from ERS, Envisat and Radarsat satellites it is therefore possible to undertake a systematic characterization of these internal waves. In this investigation the mixed layer depths, amplitudes and propagation speeds of the internal waves have been estimated, and their spatial and temporal variations have been analyzed. The main results of this analyzes will be presented including an inter-comparison and relationship between monthly averaged mixed layer depths calculated with in-situ measurements and the spatial and temporal variations of the internal waves.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry