| Linkage Between the Northeast Mongolian Precipitation and the Northern Hemisphere Zonal Circulation |
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| 作者姓名： | 王会军 |
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| 作者单位： | Institute of |
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| 基金项目： | the Chinese Academy of Sciences key program，国家自然科学基金 |
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| 摘 要： | The long-term relationship between the tree-ring-reconstructed annual precipitation in northeastern Mongolia (PRM) and the Northern Hemisphere Zonal Circulation (NHZC)§defined as the normalized zonal mean sea-level pressure at 60N in May-June-July, is examined in this study. A significant correlation coefficient (0.31) was found between the NHZC indices and PRM based on the dataset for the period of 1872–1995. The mechanisms responsible for the relationship are discussed through analyses of the atmospheric general circulation variability associated with NHZC. It follows that NHZC-related atmospheric circulation variability provides an anomalous southeast flow from the ocean to Northeast Mongolia (northwest flow from Northeast Mongolia to the ocean) in the middle and low troposphere in positive (negative) phase of NHZC, resulting in more (less) water vapor transport to the target region and more (less) precipitation in Northeast Mongolia.
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| 关 键 词： | 纬向环流 北半球 大气环流 蒙古 |
| 收稿时间： | 2006-04-06 |
| 修稿时间： | 2006-05-19 |
Linkage between the northeast Mongolian precipitation and the Northern Hemisphere Zonal Circulation |
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| Huijun Wang.Linkage Between the Northeast Mongolian Precipitation and the Northern Hemisphere Zonal Circulation[J].Advances in Atmospheric Sciences,2006,23(5):659-664. |
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| Authors: | Huijun Wang |
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| Institution: | Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The long-term relationship between the tree-ring-reconstructed annual precipitation in northeastern Mongolia (PRM) and the Northern Hemisphere Zonal Circulation (NHZC), defined as the normalized zonal mean sea-level pressure at 60°N in May-June-July, is examined in this study. A significant correlation coefficient (0.31) was found between the NHZC indices and PRM based on the dataset for the period of 1872-1995. The mechanisms responsible for the relationship are discussed through analyses of the atmospheric general circulation variability associated with NHZC. It follows that NHZC-related atmospheric circulation variability provides an anomalous southeast flow from the ocean to Northeast Mongolia (northwest flow from Northeast Mongolia to the ocean) in the middle and low troposphere in positive (negative) phase of NHZC, resulting in more (less) water vapor transport to the target region and more (less) precipitation in Northeast Mongolia. |
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| Keywords: | Tree-ring-reconstructed precipitation Northern Hemisphere zonal circulation atmospheric general circulation |
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