On radar signatures of upwelling

ALPERS Werner; ZENG Kan

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On radar signatures of upwelling
Vol. 24, Issue S1, Pages: 89-94(2020)
Received：21 October 2019，

Accepted：16 April 2020，

Published：07 June 2020
DOI：
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DOI：

Alpers W and Zeng K. 2020. On radar signatures of upwelling. Journal of Remote Sensing(Chinese). 24(S1): 89-94 DOI：

摘要

Abstract

In studies of upwelling

usually data from infrared and optical sensors are used which provide 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 (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.

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references

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