Quantitative study of effects of the sea chlorophyll-a concentration by typhoon based on remote-sensing

The study of effect to the ocean color environment caused by typhoon is another application of satellite ocean remote sensing.There are less remote sensing data in the period of hurricanes,so many scholars in the world mainly study some specialty phoons' effects on the sea surface temperature(SST) , chloro phyll-a(chl-a) and the primary product and there are fewer people to carry through quant it ativea nalysis and modeling to the effects by remote sensing data. From 2000 to 2007,there were nearly 100 times ty phoons passing through China sea area and the north west Pacific Ocean. By analysing the level "3A" data of chlorophyll-a of the MODIS and SeaWiFS,the authos get some conclusions as follows. first,the chlorophyll-a concent ration in the correlative area has increased,it averagely rises to about 1.426 times than the usual,even over 5 times in several areas. This growing up lagged about 3~6 d and it came back to the normal value after 7~10 d.Second,by using statistic linear regression to the rate of chl-a concent ration increment(R_chl-a) and typhoon-effectfactor(Tsub>w) ,the authors get anequation as follows:R_chl-a=0.0012Tsub>w+1.017 and the correlation coefficient is 0.8.Thirdly,the concent ration(C_chl-a) of chl-a with typhoon and without typhoon has a strong linear relation,which meets such equation as C_chl-a=1.2367C_0chl-a+0.0636,and the correlation coefficient is up to 0.98.It is helpful to deeply under stand the effectsof the ocean color environment by the typhoon using remote sensing.