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高原气象  1993, Vol. 12 Issue (1): 56-66    
论文     
1,7月东亚大陆低空高低压的天气气候学分析
许宝玉, 罗四维
中国科学院兰州高原大气物理研究所, 甘肃省兰州市 730000
SYNOPTICAL AND CLIMATOLOGICAL ANALYSIS OF THE CYCLONE AND ANTICYCLONE IN THE LOWER ATMOSPHERE OVER THE EAST ASIAN CONTINENT IN JANUARY AND JUNE
Xu Baoyu, Luo Siwei
Lanzhou Institute of Plateau Atmospheric Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000
 全文: PDF(757 KB)   HTML
摘要: 本文利用1976-1985年对1,4,7和10月亚洲地区地面图、850 hPa及700 hPa3层图上的各类高、低压中心的分布特点,作了天气气候学分析。主要结果:(1)1月除青藏高原外,在山脉的迎风面产生高压,背风面产生低压并与一般规律一致。(2)在青藏高原附近有5个低压高频中心,其主要特点是由地面到700 hPa频率增大很快,其西边的对应高空切断冷涡经常出现,其余4个多为局地生成的弱低压,东移很快消失;其中以四川的西南涡最为典型,在地面图上很少,但到700 hPa每天出现一次,其频率中心一年四季都很大,春秋季更大,夏季略小但涡较强。(3)1月地面冷高压以蒙古西部山区的最强,出现频率最大,但在850 hPa其频率及强度都减弱很快,而以高原东北角陕甘宁地区的小高压最强,出现频率也最大。这些地区海拔高度接近850 hPa等压面,其分析结果应能比较真实地代表地面情况,而海平面图距地面较远,向下订正时会带来误差,即海平面的蒙古高压的强度及频率有可能不够真实。而兰州附近可能存在某种增压的机理。
关键词: 东亚大陆低空高低压分布天气气候学分析    
Abstract: In this paper,we have analysed the synoptical and climatological feature of the cyclone and anticyclone on the sea-level,850 hPa and 700 hPa charts in the Eurasian continent in January,April,July and October of 1976-1985.The main results are:(1) Except for Qinghai-Xizhang Plateau,the lee cyclogenesis and the windward anticyclogenesis over the Asian mountains are the same as the general rule.(2) There are five frequent centers of the low pressure whose main features are that from sea level to 700 hPa their frequencies increase rapidly.The frequent center for the west of the Qinghai-Xizang Plateau corresponds to the cut off low in the upper atmosphere which always appears and the other four centers of weak low pressures are generated by local,which always move eastward and disappear rapidly.The southwest vortex over Sichuan Province is typical one of them,which appears rare at surface (sea level) but about once a day on 700 hPa.Its frequent center is large for all four seasons in which it is larger in spring and autumn and less in summer,but vortex is stronger in summer.(3) In January on the sea level cold high over the west mountains of the Mongolia is the strongest with the largest frequecy but on 850 hPa it decreases rapidly in intensity and frequency.The smaller scale anticyclone over the region of Shanxi,Gansu and Ningxia Provinces-northeast part of the Qinghai-Xizang Plateau is the strongest with maximum frequecy.The sea level elevation of these areas approach to 850 hPa and their analysed results should be more able to represent the real situation of the surface but the analysis on the sea level chart may make more mistake due to the correction from the surface to sea level,i.e.the intensity and frequency of the Mongolian High on the sea level may not be true enough and some mechanism of pressure increase may exist around Lanzhou-northeast part of the Qinghai-Xizang Plateau.
Key words: The continent of East Asia    The distribution of the cyclone and anticy-clone in the lower atmosphere    The synoptical and climatological analysis
收稿日期: 1992-09-26 出版日期: 1993-03-24
基金资助: 国家自然科学基金资助项目(48970254号)
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引用本文:

许宝玉, 罗四维. 1,7月东亚大陆低空高低压的天气气候学分析[J]. 高原气象, 1993, 12(1): 56-66.

Xu Baoyu, Luo Siwei. SYNOPTICAL AND CLIMATOLOGICAL ANALYSIS OF THE CYCLONE AND ANTICYCLONE IN THE LOWER ATMOSPHERE OVER THE EAST ASIAN CONTINENT IN JANUARY AND JUNE. PLATEAU METEOROLOGY, 1993, 12(1): 56-66.

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http://www.gyqx.ac.cn/CN/        http://www.gyqx.ac.cn/CN/Y1993/V12/I1/56

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