| 北半球冰川物质平衡的突变 |
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| 引用本文： | 曹梅盛.北半球冰川物质平衡的突变[J].冰川冻土,1999,21(3):249-252. |
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| 作者姓名： | 曹梅盛 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所!甘肃兰州730000 |
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| 摘 要： | 据世界冰川监测处（ＷＧＭＳ）收集，编辑和出版的全球冰川物质平衡序列资料，用序列平均滑动ｔ检验，探测了北半球２０ａ以上长序列３３条冰川的１０ａ尺度突变。结果表明，突变发生年代的区域特征与气候环流背景突变很相近。证实冰川年物质平衡序列反映气候背景突出的能力与灵敏性。
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| 关 键 词： | 气候变化 冰川物质平衡 冰川 |
Abrupt Changes in Glacier Mass Balance Over Northern Hemisphere |
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| CAO Mei,sheng.Abrupt Changes in Glacier Mass Balance Over Northern Hemisphere[J].Journal of Glaciology and Geocryology,1999,21(3):249-252. |
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| Authors: | CAO Mei sheng |
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| Abstract: | Based on the time series over 20 a of annual mass balance for 33 glaciers over northern hemisphere, collected, compiled and published by the World Glacier Monitoring Service, it is distinguished whether there were abrupt changes in the time scale of 10 a using moving average t test in this paper The results show that the regional features of the abruptchanging decades are associated with those of the abrupt changes in circulation background For examples, an abrupt change in the coupled ocean atmosphere system over the tropical Pacific during the mid 1970s was both observed and simulated by a general circulation model This led to obvious changes in the largescale boreal winter circulation pattern over the north Pacific, marked by a southward shift and intensification of the Aleutian Low and of the prevailing westerlies over the mid latitude central and eastern Pacific The intensity index of the Pacific/North American atmospher circulation teleconnection pattern had an abrupt change in the mid 1970s It caused an abrupt change in glacier mass balance around the Pacific at the same time Similarly, the abrupt change in glacier mass balance around the Atlantic in the 1980s was caused by the abrupt change in intensity index of Western Atlantic in 1983 Thus, it is clear that the abrupt changes in glacier mass balance can sensitively reflect the abrupt changes in climate and environment |
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| Keywords: | Glacier annual mass balance abrupt change climate change |
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