Climate regionalization of surface winds imply associated to wind speed distribution in China. According to the daily mean wind speed data of 608 stations in China from 1980 to 2009, the distribution of predominant patters is analyzed by the Rotated Empirical Orthogonal Function (REOF) method. The results show that there are ten regions which is related to the topography of China. There is higher wind speed in the north and smaller in the middle of China. It is also analyzed between the frequency of effective wind speed and distribution of wind energy. Based on the harmonic analysis, the results show that there are two kind variation including a single peak-valley pattern and double peak-valley pattern. According to the different atmospheric circulation features, it is analyzed that the higher wind speed happed in spring. A significant declining trend of wind speed existed in a large part of China by using the methods of linear regression. The mean declining rate in first, fourth and fifth region is within range of -0.028~-0.023 m·s-1·a-1. Therefore, it is inverse trend in the middle part of China (the second, sixth and tenth region). The results showed that the abrupt change points appeared in 2000 for the second, third and fifth regions and in earlier year of 1990 for the first, fifth and sixth region by using Mann-Kendall test. The contemporaneous correlation between characteristic quantities of atmospheric circulation and wind speed in China is studied. The result show that northern polar vortex and subtropical anticyclone play a great role in the variation of wind speed.
XIONG Minquan
. Climate Regionalization and Characteristics of Surface Winds over China in Recent 30 Years[J]. Plateau Meteorology, 2015
, 34(1)
: 39
-49
.
DOI: 10.7522/j.issn.1000-0534.2013.00159
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