| 北半球冬季大气环流遥相关型特征与我国区域气候 |
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| 引用本文： | 林振敏,施能.北半球冬季大气环流遥相关型特征与我国区域气候[J].气象科技,2004,32(5):333-337342. |
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| 作者姓名： | 林振敏 施能 |
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| 作者单位： | 南京气象学院,气象灾害和环境变化重点开放实验室,南京,210044 |
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| 基金项目： | 国家自然科学基金40275028资助 |
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| 摘 要： | 计算了1951／1952～2002／2003年北半球冬季大气环流遥相关型的强度指数，研究了它们的长期变化和近期特征，指出近10年来WA型的负趋势，PNA型的正趋势还在持续并有所加强。它们的强度突变分别发生于20世纪80年代初(WA型1984年由强转弱)及70年代中(PNA型1976年由弱转强)。还指出，近10年来，亚洲(亚欧)地区的纬向环流强度继续在加强，经向环流强度继续在减弱，大气环流及遥相关型强度的这种变化是中国冬季气候变化的一个重要原因。
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| 关 键 词： | 遥相关型 大气环流 北半球 区域气候 纬向环流 长期变化 气候变化 中国 中国 地区 |
Characteristics of Winter Atmospheric Teleconnection Patterns in Northern Hemisphere and Their Effects on Climate in China |
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| Lin Zhenmin Shi Neng.Characteristics of Winter Atmospheric Teleconnection Patterns in Northern Hemisphere and Their Effects on Climate in China[J].Meteorological Science and Technology,2004,32(5):333-337342. |
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| Authors: | Lin Zhenmin Shi Neng |
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| Abstract: | The intensity indexes of winter atmospheric circulation teleconnection patterns in the Northern Hemisphere from 1951/1952 to 2002/2003 were calculated and the secular variation and recent characteristics were analyzed. It is shown that the significant negative trend of WA (Western Atlantic) intensity index and the positive trend of PNA (Pacific/North American) intensity index become stronger in the recent ten years. The abrupt changes of their intensities occurred in the early 1980's when WA pattern weakening and in the middle 1970's when PNA pattern strengthening, respectively. The continued strengthening of the winter zonal circulation intensity and the continued weakening of the winter meridional circulation intensity were observed in the area of Asia and Eurasia in the recent ten years. This interdecadal changes of atmospheric circulation and teleconnection pattern intensity are one of important causes of climate changes over China in winter. |
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| Keywords: | winter teleconnection intensity index current feature climate change |
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