| RELATIONSHIPS BETWEEN ZONAL WIND ANOMALIES IN HIGH AND LOW TROPOSPHERE AND ANNUAL FREQUENCY OF NW PACIFIC TROPICAL CYCLONES |
| |
| 作者姓名： | 龚振淞 何敏 |
| |
| 作者单位： | GONG Zhen-song（Laboratory of Climate Study/CMA, National Climate Center, Beijing 100081 China） ;
HE Min（Laboratory of Climate Study/CMA, National Climate Center, Beijing 100081 China） ; |
| |
| 基金项目： | Research on predictive signals and methods for short-short climate of annual frequency of typhoons, a project from the research fund on typhoons of 2003 - 2004 at Shanghai Typhoon Institute |
| |
| 摘 要： | Relationships between large-scale zonal wind anomalies and annual frequency of NW Pacific tropical cyclones and possible mechanisms are investigated with the methods of correlation and composition.It is indicated that when △ U200-△U850 ＞0 in the eastern tropical Pacific and △ U200- △U850 ＜0 in western tropical Pacific, the Walker cell is stronger in the Pacific tropical region and the annual frequency of NW Pacific tropical cyclone are above normal. In the years with zonal wind anomalies, the circulation of high and low troposphere and the vertical motions in the troposphere have significant characteristics. In the time scale of short-range climate prediction, zonal wind anomalies in high and low troposphere are useful as a preliminary signal of the annual frequency prediction of NW Pacific tropical cyclones.
|
| 关 键 词： | 大气环流 对流层 热带 频率 |
RELATIONSHIPS BETWEEN ZONAL WIND ANOMALIES IN HIGH AND LOW TROPOSPHERE AND ANNUAL FREQUENCY OF NW PACIFIC TROPICAL CYCLONES |
| |
| GONG Zhen-song,HE Min.RELATIONSHIPS BETWEEN ZONAL WIND ANOMALIES IN HIGH AND LOW TROPOSPHERE AND ANNUAL FREQUENCY OF NW PACIFIC TROPICAL CYCLONES[J].Journal of Tropical Meteorology,2007,13(2):169-172. |
| |
| Authors: | GONG Zhen-song HE Min |
| |
| Institution: | Laboratory of Climate Study/CMA, National Climate Center, Beijing 100081 China |
| |
| Abstract: | Relationships between large-scale zonal wind anomalies and annual frequency of NW Pacific tropical cyclones and possible mechanisms are investigated with the methods of correlation and composition.It is indicated that when △ U200-△U850 ＞0 in the eastern tropical Pacific and △ U200- △U850 ＜0 in western tropical Pacific, the Walker cell is stronger in the Pacific tropical region and the annual frequency of NW Pacific tropical cyclone are above normal. In the years with zonal wind anomalies, the circulation of high and low troposphere and the vertical motions in the troposphere have significant characteristics. In the time scale of short-range climate prediction, zonal wind anomalies in high and low troposphere are useful as a preliminary signal of the annual frequency prediction of NW Pacific tropical cyclones. |
| |
| Keywords: | zonal wind anomalies in high and low troposphere annual frequency of tropical cyclone short-range climate prediction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
