| Dust Storms in North China in 2002： A Case Study of the Low Frequency Oscillation |
| |
| 引用本文： | 范可,王会军.Dust Storms in North China in 2002： A Case Study of the Low Frequency Oscillation[J].大气科学进展,2007,24(1):15-23. |
| |
| 作者姓名： | 范可 王会军 |
| |
| 作者单位： | [1]Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 [2]Department of Atmospheric Science, Yunnan University, Kunming 650091 [3]Graduate University of the Chinese Academy of Sciences, Beijing 100039 |
| |
| 摘 要： | The low frequency oscillation in both hemispheres and its possible role in the dust weather storm events over North China in 2002 are analyzed as a case study. Results show that the Aleutian Low is linked with the Circumpolar Vortex in the Southern Hemisphere on a 30-60-day oscillation, with a weak Circumpolar Vortex tending to deepen the Aleutian Low which may be helpful for the generation of dust storm events. The possible mechanism behind this is the inter-hemispheric interaction of the mean meridional circulation, with the major variability over East Asia. The zonal mean westerly wind at high latitudes of the Southern Hemisphere in the upper level troposphere may lead that of the Northern Hemisphere, which then impacts the local circulation in the Northern Hemisphere. Thus, the low frequency oscillation teleconnection is one possible linkage in the coupling between the Southern Hemisphere circulation and dust events over North China. However, the interannual variation of the low frequency oscillation is unclear.
|
| 关 键 词： | 低频振荡 2002年 中国北部 沙尘暴 大气环流 |
| 收稿时间： | 2005-12-15 |
| 修稿时间： | 2006-06-05 |
Dust storms in North China in 2002: A case study of the low frequency oscillation |
| |
| Fan?Ke,Wang?Huijun.Dust storms in North China in 2002: A case study of the low frequency oscillation[J].Advances in Atmospheric Sciences,2007,24(1):15-23. |
| |
| Authors: | Fan Ke Wang Huijun |
| |
| Institution: | Nansen-Zhu International Research Centre,
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;
Department of Atmospheric Science, Yunnan University, Kunming 650091;
Graduate University of the Chinese Academy of Sciences, Beijing 100039,Department of Atmospheric Science, Yunnan University, Kunming 650091 |
| |
| Abstract: | The low frequency oscillation in both hemispheres and its possible role in the dust weather storm events over North China in 2002 are analyzed as a case study. Results show that the Aleutian Low is linked with the Circumpolar Vortex in the Southern Hemisphere on a 30-60-day oscillation, with a weak Circumpolar Vortex tending to deepen the Aleutian Low which may be helpful for the generation of dust storm events.The possible mechanism behind this is the inter-hemispheric interaction of the mean meridional circulation,with the major variability over East Asia. The zonal mean westerly wind at high latitudes of the Southern Hemisphere in the upper level troposphere may lead that of the Northern Hemisphere, which then impacts the local circulation in the Northern Hemisphere. Thus, the low frequency oscillation teleconnection is one possible linkage in the coupling between the Southern Hemisphere circulation and dust events over North China. However, the interannual variation of the low frequency oscillation is unclear. |
| |
| Keywords: | dust storm events low frequency oscillation mean meridional circulation and local circulation relationship |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
|
