| 南极海冰的年际变化对中国东部夏季降水的影响 |
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| 作者姓名： | XUE Feng GUO Pinwen YU Zhihao |
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| 作者单位： | [1]InstituteofAtmospherePhysics,ChineseAcademyofSciences,Beijing100029 [2]KLME,NanjingInstituteofMeteorology,Nanjing210044 [3]DepartmentofAtmosphericSciences,NanjingUniversity,Nanjing210093 |
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| 基金项目： | This study is supported by
National Key Program for Developing Basic Sciences
(G1998040905,Part I),Chinese Academy of Sciences un-
der Grant KZCX2-203,and the National Natural Science
Foundation of China under Grants Nos.40075020 and
40233027. |
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| 摘 要： | 根据Hadley中心提供的1969—1998年的南极海冰再分析资料和其它多种观测资料，分析了南极海冰的年际和季节变化，指出南极海冰具有显著的年际变化，但与ENSO的关系则较为复杂。南极海冰维持了南半球高纬地区大气环流的季节持续性，因而对短期气候预测有较大帮助。相关分析和时间序列分析均证实中国东部夏季降水与南极海冰的年际变化有关，当北半球春夏季南极海冰增多时，华北降水增多而华南和东北降水减少。研究还表明，此种雨型分布与南极海冰变化引起的东亚夏季风环流变化有关。
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| 关 键 词： | 南极 海冰 年际变化 中国东部 夏季 降水 季节变化 |
Influence of Interannual Variability of Antarctic Sea-Ice on Summer Rainfall in Eastern China |
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| XUE Feng,GUO Pinwen,YU Zhihao.Influence of Interannual Variability of Antarctic Sea-Ice on Summer Rainfall in Eastern China[J].Advances in Atmospheric Sciences,2003,20(1):97-102. |
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| Authors: | Feng Xue Pinwen Guo Zhihao Yu |
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| Institution: | Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029,KLME, Nanjing Institute of Meteorology, Nanjing 210044,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093 |
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| Abstract: | Based on the Antarctic sea-ice coverage reanalysis data from the Hadley Center and other observationaldata during the 30-year period from 1969 to 1998, it is shown that Antarctic sea-ice coverage exhibitsconsiderable interannual variability with a complex relation to El Nino and the South Oscillation (ENSO).Besides this, the ice maintains the seasonal persistence of the atmospheric circulation in high latitudesof the Southern Hemisphere. Thus it can be used as a predictor in short-term climate prediction. Bothcorrelation and time series analyses demonstrate that summer rainfall in eastern China is closely relatedto Antarctic sea-ice coverage. When it is extended during boreal spring through summer, there is morerainfall in the lower reaches of the Yellow River of North China, and in contrast, less rainfall is found in theZhujiang River basin of South China and Northeast China. A further analysis indicates that this rainfallpattern is related to the intensity of the East Asian summer monsoon caused by interannual variability ofAntarctic sea-ice coverage. |
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| Keywords: | Antarctic sea-ice interannual variability summer rainfall |
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