| 南极极冰的时空变化特征及其对大气环流的影响 |
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| 引用本文： | 赵汉光,姬菊枝.南极极冰的时空变化特征及其对大气环流的影响[J].气象,1989,15(2):3-8. |
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| 作者姓名： | 赵汉光 姬菊枝 |
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| 作者单位： | 北京气象中心
(赵汉光)，北京气象学院(姬菊枝) |
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| 摘 要： | 本文利用1973—1982年南极极冰覆盖面积资料,分析了南极极冰的时空变化特征,并对极冰增长和融化过程的变化进行了谱分析。结果表明,整个南极极冰增长和融化过程的变化存在着准8.2周的主要振荡周期,极冰出现最大增长和融化速率的时间分别在5—6月和11—12月(北半球时间)。还发现南极极冰的变化对北半球西太平洋副高脊线位置的变动及登陆我国台风的数量有重要的影响。
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| 关 键 词： | 南极 极冰 时空变化 大气环流 |
The characters of spatial-temporal variation of the Antarctic ice coverage and its effects on the atmospheric circulation |
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| Abstract: | The charaters of spatial-temporal variation of the polar ice are analysed using the Antarctic ice coverage area data of 1973-1982. A spectralanalysis has been made to determine the changes of the polar ice in the increasing and melting processes.It is shown that there exists a main os-ciallation in a period of 8.2 weeks in these processes for the total polar ice.The maximum rate of polar ice increasing and melting occurred res-spectively between May and June as well as November and December (in the Northern Hemisphere).Al the same Lime, it is found that the variation of the Antarctic ice coverage exerted a significant impact on the positional variations of the ridge line of the subtropical high over the northwest Pacific and of the tropical cyclones landing China. |
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