1988-2009年全球地面风速变化趋势研究

Change Trend Study on Surface Wind Speed in Global from 1988 to 2009

利用来自ESE的1988-2009年高精度、高分辨率的CCMP风场资料,对全球0.25°×0.25°每个网格点上地面风速的逐年变化趋势进行分析。研究发现:近22 a期间,全球大部分区域的地面风速以显著性递增趋势为主导,递增趋势较强的区域主要分布于南极大陆的临海区域、格陵兰岛的临海区域;显著性逐年线性递减以及地面风速无明显变化趋势的区域主要散布于全球各地的一些零星区域,且不同地区地面风速的变化趋势由不同季节主导。

The annual change trend of surface wind speed from 1988 to 2009 on global 0.25~ x 0.25~ each grid point was analyzed by using the high precision and resolution CCMP （CrossCalibrated, MultiPlatform） wind field data coming from NASA ESE （Earth Science Enterprise）. The results show that the surface wind speed in most regions of the world have a significant linear increasing tendency in recent 22 years. Increasing trend in the strong areas are mainly located in the coastal region of the Ant arctic continent and Greenland＇ s coastal area. Significant linear decreasing year by year, and no signifi cant changes in surface wind speed areas are mainly scattered in the trend of a few scattered areas around the world, and changes in surface wind speed in different parts of the trend led by the different seasons.