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中国沙漠 ›› 2005, Vol. 25 ›› Issue (4): 570-576.

• 研究简报 • 上一篇    下一篇

中国北方春季沙尘暴频数与北半球500hPa高度场的SVD分析

唐红玉1, 翟盘茂2, 常有奎3   

  1. 1. 青海省气象台, 青海西宁 810001;
    2. 国家气象中心, 北京 100081;
    3. 青海省海北州气象局, 青海海晏 810200
  • 收稿日期:2004-02-08 修回日期:2004-06-15 出版日期:2005-08-20 发布日期:2005-08-20
  • 作者简介:唐红玉(1967-),女(汉族),青海省贵德县人,高级工程师,主要从事短期气候预测及气候变化方面的研究

SVD Analysis between Northern Hemisphere 500 hPa Heights and Spring Duststorms over Northern China

TANG Hong-yu1, ZHAI Pan-mao2, CHANG You-kui3   

  1. 1. Qinghai Meteorological Bureau, Xining 810001, China;
    2. National Climate Center, Beijing 100081, China;
    3. Haibei County Meteorological Bureau, Haiyan 810210, China
  • Received:2004-02-08 Revised:2004-06-15 Online:2005-08-20 Published:2005-08-20

摘要: 选取1957-2000年中国北方地区春季沙尘暴发生次数资料和北半球500hPa秋、冬、春季的平均高度场资料,对沙尘暴和高度场作SVD分析。结果表明,我国北方春季沙尘暴次数各地具有比较一致的变化趋势,表明可能与大尺度气候背景的变化有联系。变化的最敏感区域为内蒙古中西部地区、新疆西部、青海西部和东北地区。我国北方春季沙尘暴发生次数与同期及前期500hPa高度场有较好的相关关系,前期环流形势对春季沙尘暴频数有一定的指示和预测意义,冬季环流场尤其具有预报指示意义,因为前一年冬季北大西洋涛动对我国春季北方沙尘暴发生次数有影响。

关键词: 沙尘暴, 500hPa高度场, SVD分析, 春季, 中国北方

Abstract: Relationship between spring duststorms over northern China and 500 hPa heights at Northern Hemisphere in autumn, winter, and spring during period of 1957-2000 are studied by applying Singular Value Decomposition (SVD) analysis. The results reveal that variability of spring duststorms over northern China are generally consistent from place to place. The most obvious change are found in west-central Inner Mongolia, western Xinjiang, northeast and western Qinghai. The patterns of 500 hPa heights in Northern Hemisphere not only control the duststorms over northern China in the same spring but also can be used as prediction signal. Especially in winter, the anomalous height implies a clear pattern as a predictant for spring duststorms. North Atlantic Ocean Oscillation in the winter has impact on occurrence of duststorms in the coming spring.

Key words: sand-dust storm, geopotential height of 500 hPa, Singular Value Decomposition (SVD) analysis, spring, northern China

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