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中国沙漠 ›› 2008, Vol. 28 ›› Issue (2): 357-361.

• 天气与气候 • 上一篇    下一篇

内蒙古中西部春季沙尘暴年代际振荡及环流特征分析

马清霞1; 韩经纬2; 王星晨3

  

  1. 1.内蒙古自治区气候中心, 内蒙古 呼和浩特 010051; 2.内蒙古自治区气象台, 内蒙古 呼和浩特 010051; 3.内蒙古自治区气象局技术装备中心, 内蒙古 呼和浩特 010051
  • 收稿日期:2007-03-20 修回日期:2007-05-09 出版日期:2008-03-20 发布日期:2008-03-20

Analysis on Decadal Oscillation and Circulation Features of Spring Sand-dust Storm in Midwest of Inner Mongolia

MA Qing-xia1; HAN Jing-wei2; WANG Xing-chen3
  

  1. 1.Inner Mongolia Climate Center, Hohhot 010051, China; 2.Inner Mongolia Autonomous Region Observatory, Hohhot 010051, China; 3.Technique Equipment Center of Inner Mongolia Meteorological Bureau, Hohhot 010051, China
  • Received:2007-03-20 Revised:2007-05-09 Online:2008-03-20 Published:2008-03-20

摘要:

利用内蒙古中西部50个气象观测站1961—2000年春季沙尘暴日数资料,国家气候中心提供的北半球月平均500 hPa高度场网格尺度为10°(经度)×5°(纬度)的网格点资料、北半球500 hPa月平均环流特征量资料、东亚季风资料分析研究冬春季中高纬度大气环流的年代际尺度的演变特征及其对内蒙古中西部沙尘暴的影响,进一步揭示内蒙古中西部春季沙尘暴年代际变化的原因。结果表明:青藏高原位势高度、贝加尔湖地区位势高度、乌拉尔山地区位势高度、东亚冬季风、亚州经向环流、印缅槽、西太平洋副热带高压强度都对内蒙古中西部春季沙尘暴年代际振荡产生不同的影响。为内蒙古中西部春季沙尘暴的短期气候预测提供年代际尺度上的基本环流背景。

关键词: 沙尘暴, 年代际振荡, 环流特征, 内蒙古中西部

Abstract: The following data were used to be used to analyze the decadal atmospheric circulation evolution features in mid and high latitude in winter and spring, and the influence on sand-dust storm frequency in the Midwest of Inner Mongolia: the data of spring sand-dust storm from 1961 to 2000 provided by the 50 meteorological observatories of Inner Mongolia; the data of the monthly mean field at 500 hPa height scaled by 10 longitude multiplied by 5 latitude and of the monthly mean circulation features at 500 hPa height in northern hemisphere, and of the East Asian monsoon provided by National Climate Center. It was revealed that many factors generate different influence on the decadal change of sand-dust storm frequency in the Midwest of Inner Mongolia, these factors include: Qinghai-Tibet Plateau geopotential height, Baikal area geopotential height, Ural mountain geopotential height, Okhotsk sea geopotential height, East Asian winter monsoon, Asian meridional circulation, trough between Indian and Burma, and west Pacific subtropical high intensity, etc. These factors provide the basic circulation background at decadal scale for the short-term climate forecast of sand-dust storm events in Spring in the Midwest of Inner Mongolia.

Key words: sand-dust storm, decadal oscillation, circulation feature, Midwest of Inner Mongolia

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