Study on the assessment method of typhoon regional disaster based on the change of cholorophyll-a concentration in seawater

摘要

Due to global climate change, the frequency and uncertainty of typhoon become more and more prominent. When a typhoon disaster occurs, it's an imminent problem to estimate the disaster zone and help ships to move to safer waters. Existing studies on typhoon disaster are mainly based on the overall wind assessment or the route prediction of the typhoon, with much less attention on the detailed impact in different regions along the route. In this paper, we propose a new estimate method based on the assessment of chlorophyll-a concentration in seawater. We (1) study Landsat-8 satellite images under typhoon weather and normal weather in the same area; (2) calculate chlorophyll-a concentration, based on which we (3) build a typhoon disaster model. The experiment shows that our model can assess the impact of a typhoon in different regions based on the level of chlorophyll-a concentration.