On Radar Signatures of Upwelling

In studies of upwelling, usually data from infrared and optical sensors is used which provides information on the sea surface temperature (SST) and the chlorophyll-a (Chl-a) concentration. In this paper, we show that also synthetic aperture radars (SAR) images can give valuable contribution to such...

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Bibliographic Details
Main Author: Werner ALPERS,Kan ZENG
Format: Article
Language:English
Published: Surveying and Mapping Press 2021-03-01
Series:Journal of Geodesy and Geoinformation Science
Subjects:
Online Access:http://jggs.sinomaps.com/fileup/2096-5990/PDF/1617703722530-509869466.pdf
Description
Summary:In studies of upwelling, usually data from infrared and optical sensors is used which provides information on the sea surface temperature (SST) and the chlorophyll-a (Chl-a) concentration. In this paper, we show that also synthetic aperture radars (SAR) images can give valuable contribution to such studies. Upwelling regions become detectable by SAR because they are associated with a reduction of the radar backscatter due to ① the change of the stability of the air-sea interface or/and ② the presence of biogenic slicks. Furthermore, the boundary of upwelling regions consists of a line of increased radar backscatter due to the presence of convergent surface flow.
ISSN:2096-5990