Abstract:Based on the reanalysis data with horizontal resolution of 0.75°×0.75° from the European Center of Medium-range Weather Forecast(ECMWF),this paper investigates the wind energy and wind speed in the narrow area along the coastal line of China,and discusses the distribution characteristics of wind energy and wind speed in different regions and different seasons.The Weather Research Forecast(WRF) model is used to simulate the influence of sea surface temperature(SST) increase and urbanization development on wind energy in east coast of China.Results show that:(1)The wind energy has significant spatiotemporal differences among different coastal regions of China,with obvious seasonal variations.In spring,the wind energy in Bohai gulf is obviously larger than that in other regions(coastal areas of East China,southeastern China and north of South China Sea).In summer,the wind energy in Bohai gulf is clearly smaller than that in other regions and it is slightly larger in coastal area of East China.In autumn,the wind energy in coastal areas of southeastern China and north of South China Sea is significantly larger.In winter,the wind energy is similar in the four coastal regions of China.Generally,the wind energy is larger(smaller) in autumn and winter(spring and summer),and the wind energy in summer is significantly smaller than that in winter.(2)Interannual variation of wind speed has obvious differences in different coastal areas of China and different seasons.Besides the wind speed has an increasing trend in coastal area of southeastern China in winter,it has a slow decreasing trend in other areas in each season,but the range of reduction is very small.(3)Numerical simulations show that the effects of SST increasing on the wind speed in different seasons are different.The wind speed in Bohai Gulf,Shandong peninsula,Beibu Gulf coast and Hangzhou Bay increases with the increase of SST in spring.The regions of significant wind speed change are different with different SST increasing in summer,but the wind speed in most coastal areas increases with the increase of SST.The increasing of SST has great impacts on the wind speed in summer and autumn.Wind speed increases with SST increasing in autumn and winter,with more stable areas of influence.The wind speed increases in coastal areas of southeastern China and East China in autumn,and it does in coastal areas of Bohai gulf and north of South China Sea in winter.(4)The development of urbanization results in the increases of surface friction force,causing the tropical cyclone that lands on China is rapidly weakening in summer and autumn,in such a way that the wind speed decreases in coastal areas of China.