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| 1961—2007年重庆风速的气候变化特征 | |
| 引用本文： | 李艳,耿丹,董新宁,朱焱.1961—2007年重庆风速的气候变化特征[J].南京气象学院学报,2010,33(3):336-340. |
| 作者姓名： | 李艳 耿丹 董新宁 朱焱 |
| 作者单位： | 1. 重庆市气象局,重庆,401147;南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044 2. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044;常熟市气象局,江苏,常熟,215500 3. 重庆市气象局,重庆,401147 4. 常熟市气象局,江苏,常熟,215500 |
| 基金项目： | 江苏省高校自然科学研究计划项目，中国博士后科学基金，江苏省博士后科学基金，重庆市气象局开放式研究基金 |
| 摘 要： | 利用重庆地区34个常规气象观测站的1961—2007年共47 a的常规风速观测资料,采用线性趋势拟合、变化速率计算、EOF分解等方法,研究了重庆地区平均风速的时空气候变化特征。结果表明,重庆地区逐年平均风速呈现＂春季大,秋冬小＂型,47 a来各季和全年的平均风速均是显著减弱的,在20世纪70年代中前期之后出现显著的下降趋势;平均风速呈现出＂全场一致＂与＂东西反位相＂的气候变化形势,其中风速减弱的整体性变化是第一位的。 |
| 关 键 词： | 风速 气候变化 EOF分解 |
Climate Change of Wind Speed in Chongqing from 1961 to 2007 |
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| LI Yan,GENG Dan,DONG Xin-ning,ZHU Yan.Climate Change of Wind Speed in Chongqing from 1961 to 2007[J].Journal of Nanjing Institute of Meteorology,2010,33(3):336-340. | |
| Authors: | LI Yan GENG Dan DONG Xin-ning ZHU Yan |
| Institution: | 1.Chongqing Meteorological Bureau,Chongqing 401147,China; 2.Key Laboratory of Meteorological Disaster of Ministry of Education,NUIST,Nanjing 210044,China;3.Changshu Meteorological Bureau,Changshu 215500,China) |
| Abstract: | Based on the wind observations from 34 meteorological stations in Chongqing from 1961 to 2007 and the methods of linear fit,varied rate and EOF,this paper examines the temporal and spatial climate change characteristics of the near-surface average wind speed in Chongqing.The results indicate that the annual mean wind speed is higher in spring,weaker in autumn and winter.The annual average wind speed is on a decreasing trend over the period of 1961—2007 with an obvious descent after 1974.The annual average wind speed is taking on two climate change characteristics of ＂consistency in all the zones＂ and ＂difference in east and west＂ with the former one as the primary feature. |
| Keywords: | wind speed climate change EOF |
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