中国沿海风能分布特征及其影响因子的数值模拟
投稿时间: 2015-06-08  最后修改时间: 2015-06-24  点此下载全文
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粘新悦 南京信息工程大学 nxy1210@163.com 
中文摘要:本文首先利用欧洲中期天气预报中心的0.75白0.75?再分析资料对我国海岸线两侧相邻区域内的风能和风速进行了研究,讨论了不同季节、不同区域下风能、风速的大小分布特征。然后本文利用WRF(Weather Research Forecast)模式研究了海表面温度上升和城市化发展对我国东部沿海风能的影响。本文主要结论如下:(1)沿海风能、风速的时空分布在不同区域不同季节有很大差异。南北不同区域间风能随季节的分布存在明显的差异,其中渤海湾春季风能明显大于其他三个区域(华东沿海、东南沿海和南海北部)而夏季风能显著小于其他三个区域;华东地区四季风能分布相对均一,夏季风能略大于其他区域;东南沿海和南海北部沿岸区域风能秋冬两季较大。(2)沿海地区的风速常年保持在3 m s-1以上,同时整个沿海区域的秋冬两季的风能大于春夏两季的风能,尽管风速年际变化在不同区域间有较大差异,但是与风速本身大小相比,年际变化幅度较小。(3)海表温度上升对夏秋两季风速影响较大,城市化的发展会带来地表摩擦力的上升,减小夏秋两季影响我国的气旋的强度。
中文关键词:沿海风能时空分布  数值模拟  海表温度  城市化
 
The characteristics of spatiotemporal distribution of wind energy along the coastal line of China and the numerical simulation on the impact factors
Abstract:Firstly, we use the reanalysis data with horizontal resolution of 0.75白0.75?from the European Center of Medium-range Weather Forecast (ECMWF) to investigate the wind energy and wind speed in the narrow area along the coastal line of China. Discussions focus on the characteristics of the distribution of the wind energy and wind speed in different regions and different seasons. Meanwhile, the Weather Research Forecast model (WRF) is used to study influence of the increasing of sea surface temperature (SST) and the developing of urban on the wind energy in the coastal area of China. Several conclusions are drawn as follows, in the light of diagnosis and numerical simulation. (1) Significant differences are found for the spatiotemporal distribution of coastal wind energy and wind speed in different regions and seasons. The wind energy in spring in Bohai gulf is clearly larger than that in other regions (the East of China, the Southeast of China and the north of South China Sea) while this situation reverses in summer. The seasonal difference for the wind energy in the coastal area of east China is not as significant as the other regions. The wind energy in summer in the coastal area of east China is slightly but clear larger than the other regions. For the coastal area of southeast China and the north of South China Sea (SCS), the wind energy is significantly larger in autumn and winter. The annual tendency of the variance of wind speed also shows clear difference for different regions. (2) The seasonal mean of wind speed in coastal area is over 3 m s-1 for all years. The wind energy in autumn and winter is more powerful than that in spring and summer, especially for summer when the wind energy is only a half of that in winter. The annual variance of wind speed is clearly different for different regions, but it is still small when it is compared to the amount of wind speed itself. (3) Numerical simulations show that the increasing of SST has great impacts on the wind speed in summer and autumn. The urbanization results in the larger force of fraction, causing the weakening of cyclones influence China. .
keywords:The spatiotemporal distribution of coastal wind energy  Numerical simulation  SST  Urbanization
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