| 地面风速的气候特征及其对沙尘暴的影响研究 |
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| 引用本文： | 钟海玲,高荣,李栋梁.地面风速的气候特征及其对沙尘暴的影响研究[J].中国沙漠,2009,29(2):321-326. |
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| 作者姓名： | 钟海玲 高荣 李栋梁 |
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| 作者单位： | 1. 国家气候中心中国气象局气候研究开放实验室,北京,100081
2. 南京信息工程大学大气科学学院,江苏,南京,210044 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 利用EOF和典型相关统计方法,分析了我国北方近30 a地面风速变化的时空异常特征及其对沙尘暴的影响。结果表明:20世纪70年代我国北方普遍风速较大,80年代西北、华北、华东地区地面风速有所减小,90年代我国大部分地区风速明显减小;地面风速与沙尘暴存在着较好的正相关关系,即当冬季初春地面风速越大,后期年、春季、4月沙尘暴就越多;冬季初春地面风速越小,后期年、春季、4月沙尘暴就越少。相关最显著区域在南疆盆地、河西走廊及阿拉善高原。
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| 关 键 词： | 地面风速 沙尘暴 EOF 典型相关 |
| 收稿时间： | 2007-12-7 |
| 修稿时间： | 2008-2-12 |
Characteristics of Surface Wind Speed and Impacts on Sand-Dust Storms |
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| ZHONG Hai-ling,GAO Rong,LI Dong-liang.Characteristics of Surface Wind Speed and Impacts on Sand-Dust Storms[J].Journal of Desert Research,2009,29(2):321-326. |
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| Authors: | ZHONG Hai-ling GAO Rong LI Dong-liang |
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| Institution: | 1.Laboratory for Climate Studies of China Meteorological Administration, National Climate Center, Beijing 100081, China; 2.College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | The spatio-temporal characteristics of surface wind speed and their relation with sand-dust storm in northern China during the recent 30 years were analyzed by EOF and canonical correlation analysis (CCA) methods. The surface wind speed was generally larger in 1970s throughout the northern China, decreased to some extent in 1980s within regions of northwest, north and east of China, and distinctly decreased in 1990s in the majority of China. There was close correlation between surface wind speed and sand-dust storm frequency, that is, the greater surface wind speed in winter and early spring, the more sandstorms in the coming year, the spring and April, and vice versa. The most correlated lies in south Xinjiang basin, Hexi Corridor and Alax Plateau. |
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| Keywords: | EOF |
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