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 sy...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.展开更多
基金Fundation of Ocean University of China(No.201965003)。
文摘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.
