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Proceedings Paper

Study on internal wave polarity conversion from SAR images in the South China Sea
Author(s): Chan Zhang; Weigen Huang; Xilin Gan; Kaiguo Fan
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Paper Abstract

The polarity conversion of oceanic internal solitary waves (ISWs) in the South China Sea (SCS) is studied using synthetic aperture radar (SAR) images. Eight SAR images which have oceanic internal wave polarity conversion information in the SCS are selected from about 300 oceanic internal wave SAR images between 1998 and 2008. It is found that the elevation ISWs mainly occur in the area from 114°E to 115°E longitude and from 20°N to 22°N latitude during summer and early autumn. All the ISWs propagate westwards with the wavelengths between 300m and 800m. The polarity conversion is analyzed using one SAR image which contains successive elevation internal waves and the two-layer KdV theory. Studies with in situ data show that the occurrence of polarity conversion of ISWs in the SCS is related to a thicker upper mixed layer compared with the lower layer on the continental shelf.

Paper Details

Date Published: 30 October 2009
PDF: 7 pages
Proc. SPIE 7498, MIPPR 2009: Remote Sensing and GIS Data Processing and Other Applications, 74980R (30 October 2009); doi: 10.1117/12.832924
Show Author Affiliations
Chan Zhang, State Oceanic Administration (China)
Weigen Huang, State Oceanic Administration (China)
Xilin Gan, State Oceanic Administration (China)
Kaiguo Fan, State Oceanic Administration (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 7498:
MIPPR 2009: Remote Sensing and GIS Data Processing and Other Applications
Faxiong Zhang; Faxiong Zhang, Editor(s)

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