• 资源评价 •

### 宜昌地区中低空风速变化特征分析

1. 1. 湖北省气象服务中心,武汉 430205;
2. 恩施土家族苗族自治州气象局,湖北 恩施 445000;
3. 湖北省信息技术与保障中心,武汉 430074
• 收稿日期:2014-12-09 出版日期:2016-02-25 发布日期:2016-02-25
• 作者简介:孟丹（1989- ）,女,江苏淮安人,助工,硕士,主要从事风能资源评估与气候变化研究。E-mail:604026294@qq.com
• 基金资助:
中国气象局气候变化专项（CCSF201510）; 湖北省气象局科技发展基金（2015Q06）

### Analysis on Tendency of Middle and Low Air Wind Speed over Yichang Region

MENG Dan1, CHEN Zheng-hong1, DING Nai-qian2, CHEN Cheng3

1. 1.Hubei Meteorological Service Center, Wuhan 430074, China;
2.Enshi Meteorological Bureau, Enshi 445000, Chian;
3.Hubei Information Technology and Security Center, Wuhan 430074, China
• Received:2014-12-09 Online:2016-02-25 Published:2016-02-25
• Supported by:
Special Climate Change of CMA, No.CCSF201510; Science and Technology Development Fund of Hubei Meteorological Administration, No.2015Q06

Abstract: Based on the data of daily radiosonde wind (altitude below 3 000 m) from 1958 to 2013 in Yichang, the tendency variation of middle-low air wind speed over Yichang region are analyzed by using trend coefficient, moving t-test, and wavelet analysis, and the variations of middle and low air wind speed and surface wind speed in the same period are compared. The results show that: 1) Variation of monthly mean wind speed at 500 m and 1 000 m height are bimodal curves, the monthly mean wind speed at 1 500 m and 2 000 m height are more consistent, while the monthly mean wind speed at 3 000 m fluctuate violently. 2) Seen from the seasonal distribution, mean wind speeds at 500 m and 1 000 m height are maximum in spring, while the wind speed at 3 000 m height is the largest in winter; the vertical increased amplitude of wind speed vary at different altitude. 3) The annual and seasonal variations of wind speed at 500 m height are the fiercest; the deviation factor of annual mean wind speed decreases significantly from 500 m to 2 000 m height. 4) From 1971 to 2013, the annual mean wind speed on surface (10 m), and those of at 500 m, 2 000 m, and 3 000 m height all showed significant decreasing trend, while the annual mean wind speeds at 1 000 m and 1 500 m increased a little with no significance. 5) The middle and low air wind speed mainly experienced from decline to rise in the 1980s and from rise to decline in the 1990s; the number of abrupt changes is maximum in winter, and it is minimum in summer; in addition, the number of abrupt changes of annual and seasonal mean wind speed decreased with the increase of height. 6) There are long term cycle of 8-14 a and short term cycle of 2-4 a of annual mean wind speed at each altitude, that the former mainly concerned with summer and autumn, while the latter mainly concerned with spring and winter.

• P425.3