On Radar Signatures of Upwelling

• 来源期刊: 测绘学报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: Special Issue
• 页码范围: 17-23
• 页数: 7页
• 语种: 英文

摘要

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 to①the change of the stability of the air-sea interface or/and②the 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.