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| 南岳高山站1953—2010年风的气候特征分析 | |
| 引用本文： | 陈德桥,戴泽军,叶成志,张剑明.南岳高山站1953—2010年风的气候特征分析[J].气象,2012,38(8):977-984. |
| 作者姓名： | 陈德桥 戴泽军 叶成志 张剑明 |
| 作者单位： | 1. 湖南省衡阳市气象局,衡阳,421001 2. 湖南省气象局,长沙,410007 3. 湖南省株洲市气象局,株洲,412003 |
| 基金项目： | 中国气象局2011年气象关键技术集成与应用项目（CMAGJ2011M35）和湖南省气象局2010年重点科研项目（NO.201004）共同资助 |
| 摘 要： | 利用1953--2010年南岳高山站风观测资料，采用趋势分析、矢量分解、小波分析及M-K突变分析等方法，分析了南岳站风的气候变化特征。结果表明：（1）南岳山盛行风具有明显的季节变化，春夏盛行西南风，秋冬盛行北风。（2）年平均风速呈显著减弱趋势，减小速率为-0．25m·^-1／10年，四季中夏季变率最大，冬季变率最小，夏、冬季分别从20世纪70年代后期和80年代后期开始风速发生了明显减弱。风矢量分解后显示，经、纬向风速均呈减弱趋势，经向风速的减小速率远大于纬向，南、北风分量风速都在减弱，北风分量风速减小速率明显大于南风分量，西、南风分量仅在夏季显著减弱，而北风分量在春、秋、冬季都呈显著减弱趋势。分析还发现，南岳山风场年代际变化特征显著，年以及冬季平均风速16年周期振荡在20世纪90年代后发生了明显转折，与同时期的大气环流变化趋势基本一致。 |
| 关 键 词： | 南岳高山站 风 统计 气候特征 |
| 收稿时间： | 2011/8/30 0:00:00 |
| 修稿时间： | 2/6/2012 12:00:00 AM |
An Analysis of the Climatic Variations in Winds Observed at the Nanyue Mountain Observatory During 1953-2010 |
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| CHEN Deqiao,DAI Zejun,YE Chengzhi and ZHANG Jianming.An Analysis of the Climatic Variations in Winds Observed at the Nanyue Mountain Observatory During 1953-2010[J].Meteorological Monthly,2012,38(8):977-984. | |
| Authors: | CHEN Deqiao DAI Zejun YE Chengzhi and ZHANG Jianming |
| Institution: | 1 Hengyang Meteorological Office of Hunan Province,Hengyang 421001 2 Hunan Meteorological Service,Changsha 410007 3 Zhuzhou Meteorological Office of Hunan Province,Zhuzhou 412003 |
| Abstract: | Based on the 1953—2010 meteorological records at the Nanyue Mountain Observatory,the climatic variations of winds are examined by using the trend analysis,the vector decomposition,the wavelet analysis,and the Mann-Kendall test statistics.The results can be shown that:（1） the prevailing winds over the Nanyue Mountain exhibit significant seasonal variations,with the prevailing wind being southwesterly in spring and summer and being northerly in autumn and winter;（2） annual mean wind speed experienced statistically significant decreasing at an averaged rate of - 0.25 m ? s-1 /decade,with the maximum trend occurring in summer and minimum trend in winter.In addition,vector decomposition analysis indicates that both meridional and zonal wind speeds show decreasing trends,with the meridional declining faster than the zonal declining.For the meridional slowdown,the north wind decrease is faster than the south wind.Statistically significant declining trends in the west and south wind components can only be detected in summer,while significant slowdown in the north wind can be found in all seasons except in summer.Analysis also indicates that winds over the Nanyue Mountain exhibit significant interannual and interdacedal variations.Oscillations with 16-year periods can be detected both in annual mean and winter wind speeds,but they are remarkably changed after the 1990s.It is suggested that the interdecadal variation of wind speed may be closely associated with the variations of large-scale East Asian monsoon systems. |
| Keywords: | Nanyue Mountain Observatory mountain wind variations and trends statistical characteristics climate features |
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