| 低层平流层高低压中心的分布特征 |
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| 引用本文： | 贺慧霞,瞿章.低层平流层高低压中心的分布特征[J].高原气象,1993,12(4):384-391. |
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| 作者姓名： | 贺慧霞 瞿章 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所，中国科学院兰州高原大气物理研究所 甘肃省 兰州市730000，甘肃省 兰州市730000 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 本应用德国自由柏林大学气象研究所的北半球平流层资料，分析了多年各月平均图上的高低压中心，然后统计在各纬带和在各区块上的频数，得到两个主要结果：（１）北半球低层平流高压中心在夏季经常出现于极圈，而低压中心在冬季也经常出现于极圈，连同大规模东西风风系的转换，两形成强烈的反相季变；（２）高压中心在冬季还经常出现于太平洋等地区。这说明地表海陆分布的热力不均匀，在紧贴着对流层低层的平流层里也有所反映。
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| 关 键 词： | 低层 平流层 压力中心 频数 大气 |
THE DISTRIBUTION OF THE HIGH AND LOW PRESSURE CENTRES IN THE LOWER STRATOSPHERE |
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| He Huixia Qu Zhang.THE DISTRIBUTION OF THE HIGH AND LOW PRESSURE CENTRES IN THE LOWER STRATOSPHERE[J].Plateau Meteorology,1993,12(4):384-391. |
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| Authors: | He Huixia Qu Zhang |
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| Abstract: | In this paper, the northern hemisphere stratospheric data of the Meteorological Institute, Free University Berlin, Germany, have been used to analyse the high and low pressure centres at monthly mean map for each month over 20 years, and then to count statistically its frequency on each latitude zone and its frequency on the block areas. The two main results are as follows:
(1) In the lower stratosphere of the northern hemisphere, the centres of high pressure prefer to occur over the polar region in summer; the centres of low pressure also prefer to occur over the polar region in winter. These facts, connect with seasonal transition of the large-scale westerly and easterly wind system, the out of the phase of very intense seasonal transition is formed in the lower stratosphere. This seasonal transition of large-scale wind system called stratospheric monsoon.
(2) In winter the centres of high pressure in the lower stratosphere prefer to occur over the Pacific etc., this fact reminds the difference heating by the land and sea, and can reflect in the lower stratosphere which is adjacent to the troposphere, too. |
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| Keywords: | Lower stratosphere The frequency of the high and low pressure centres |
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