| 北极秋季海冰密集度与中国初冬降雨之间的关系 |
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| 引用本文： | 刘娜,林丽娜,孔彬,王颖杰,张占海,陈红霞.北极秋季海冰密集度与中国初冬降雨之间的关系[J].海洋学报(英文版),2016,35(5):73-78. |
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| 作者姓名： | 刘娜 林丽娜 孔彬 王颖杰 张占海 陈红霞 |
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| 作者单位： | 国家海洋局第一海洋研究所, 山东, 青岛, 266061,国家海洋局第一海洋研究所, 山东, 青岛, 266061;中国科学院南海海洋研究所, 广东, 广州, 510301,国家海洋局第一海洋研究所, 山东, 青岛, 266061;山东科技大学, 山东, 青岛, 266510,国家海洋局第一海洋研究所, 山东, 青岛, 266061,中国极地研究中心, 上海, 200136,国家海洋局第一海洋研究所, 山东, 青岛, 266061 |
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| 基金项目： | The Chinese Polar Environment Comprehensive Investigation and Assessment Programmes, State Oceanic Administration under contact Nos CHINARE2014-03-01 and CHINARE2014-04-03; the Public Science and Technology Research Funds Projects of Ocean under contact No. 201205007; the Basic Research Operating Funds of the First Institute of Oceanography, State Oceanic Administration under contact Nos 2014T02 and 2014G02. |
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| 摘 要： | 本文通过对中国地区实测降水及北极海冰卫星数据的分析,研究了北极秋季海冰密集度与中国初冬降雨的关系。合成分析的研究结果表明2000年之前中国南方和北方冬季降水偏少,中部降水偏多,这之后中国南方和北方冬季降水增加,中部降水减少。SVD研究结果显示,北极海冰减少使得近三十年来中国南方和北方冬季降雨呈现逐渐增多,中部地区(从青藏高原向东北方向至日本)降雨逐步减少的趋势。随着北极海冰的进一步减少,如遇合适的气候条件,南方冻雨出现的概率会加大。北极秋季海冰异常的回复过程加之冬季海冰异常的延续信号在中国、蒙古及日本北部激发一个阻塞高压,以巴伦支海/卡拉海为中心激发一个异常低压。这使得来自北冰洋大西洋扇区的冷空气南下至欧洲大陆和亚洲北部,在阻塞高压的影响下,冷空气进一步南下,进入东亚地区。这不仅使得亚洲冬季温度降低,也为中国北部降水增加提供条件。
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| 关 键 词： | 北极秋季海冰 中国初冬降水 SVD |
| 收稿时间： | 2015/4/11 0:00:00 |
| 修稿时间： | 2015/9/25 0:00:00 |
Association between Arctic autumn sea ice concentration and early winter precipitation in China |
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| LIU N,LIN Lin,KONG Bin,WANG Yingjie,ZHANG Zhanhai and CHEN Hongxia.Association between Arctic autumn sea ice concentration and early winter precipitation in China[J].Acta Oceanologica Sinica,2016,35(5):73-78. |
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| Authors: | LIU N LIN Lin KONG Bin WANG Yingjie ZHANG Zhanhai and CHEN Hongxia |
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| Institution: | Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China,Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China,Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Geomatics College, Shandong University of Science and Technology, Qingdao 266590, China,Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China,Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China and Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | Associations between autumn Arctic sea ice concentration (SIC) and early winter precipitation in China are studied using singular value decomposition analysis. The results show that a reduced SIC almost everywhere in the Arctic Ocean, except the northern Greenland Sea and Canadian Basin, are accompanied by dry conditions over central China, extending northeast from the Tibetan Plateau toward the Japan Sea, the Bohai Sea and the Yellow Sea, and wet conditions over South China and North China. Atmospheric circulation anomalies associated with SIC variability show two wave-train structures, which are persistent from autumn to winter, leading to the identified relationship between autumn Arctic SIC and early winter precipitation in China. Given that the decline in autumn SIC in the Arctic Ocean is expected to continue as the climate warms, this relationship provides a possible long-term outlook for early winter precipitation in China. |
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| Keywords: | Arctic autumn sea ice early winter precipitation in China SVD |
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