| 1997年北半球大气环流特征及其影响 |
| |
| 引用本文： | 陈桂英.1997年北半球大气环流特征及其影响[J].气象,1998,24(4):16-21. |
| |
| 作者姓名： | 陈桂英 |
| |
| 作者单位： | 国家气候中心 |
| |
| 摘 要： | １９９７年北半球主要环流特征为：５００ｈＰａ西太平洋副热带高压盛夏由弱转强、西伸明显、脊线位置偏北；亚洲中纬度经、纬向环流交替出现，纬向环流盛行，春、秋季经向环流加强，冬、夏季冷空气异常偏弱；盛夏南海季风增强，印度季风偏弱；赤道辐合带偏弱。北半球１００ｈＰａ中低纬度位势高度持续偏高，南亚高压东扩明显；热带海洋出现异常，一次新的厄尔尼诺事件发生，强度大、发展快。在ＥＮＳＯ和大气环流的共同影响下我国天
|
| 关 键 词： | 北半球 大气环流 环流特征 气候 季风 |
Generral Circulation over Northern Hemisphere in 1997 and Their Impact |
| |
| Chen Guiying.Generral Circulation over Northern Hemisphere in 1997 and Their Impact[J].Meteorological Monthly,1998,24(4):16-21. |
| |
| Authors: | Chen Guiying |
| |
| Abstract: | General circulation featrues over the Northern Hemisphere in 1997 are analysed. It is shown that the subtropical high over the west Pacific turns stronger, and extends to the west, and at the same time moves northward in the midsummer. At 500hPa, zonal circulation is dominant in the middle latitude of Asia in the most time of the year. Meridinal circulation strengthen during the spring and autumn. Cold air is weaker than normal during the winter and summer. Monsoon over the South China Sea is stronger than normal, monsoon over India is weaker than normal in the midsummer. ITCZ over the west Pacific is werker than normal. At 100hPa, the geopotential height at the mid low latitude is above normal. The location of the South Asia High is farther to the east than normal. A new El Nino event took place in the tropical Pacific region in 1997. the anomaly of both the tropical Pacific and atmosphere circulation exerted a significant impact on the weather and climate in China. |
| |
| Keywords: | generral circulation\ the subropical high\ climate\ monsoon\ El Nino |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《气象》浏览原始摘要信息 |
| 点击此处可从《气象》下载免费的PDF全文 |
