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| ENSO 与中国东部夏季降水的关联 | |
| 引用本文： | 张礼平,张乐飞,曾凡平.ENSO 与中国东部夏季降水的关联[J].热带气象学报,2012(2):177-186. |
| 作者姓名： | 张礼平 张乐飞 曾凡平 |
| 作者单位： | 1. 武汉区域气候中心,湖北 武汉 430074 2. 武汉大学测绘遥感信息工程国家重点实验室,湖北 武汉 430079 3. 中国科学院武汉病毒研究所,湖北 武汉 430079 |
| 基金项目： | 国家科技支撑项目(2009BAC51B05);湖北省气象局科技发展基金重点项目(2011Z03)共同资助 |
| 摘 要： | 计算1月减6月El Ni o 3.4指数与6—8月平均200、850 hPa风场的相关矢量,分析中等或强ElNi o/La Ni a事件后的夏季(6—8月)中国东部降水异常分布、西太平洋副热带高压异常特征。结果表明,对ENSO的响应,无论高、底层大气环流还是西太平洋副热带高压,1970年代中期气候突变后变为更敏感。主要表现在:对衰减的El Ni o的响应,夏季南亚高压偏东,西太平洋副热带高压偏强、偏西、偏南,印度季风、南海季风减弱,黄河下游以南副热带季风增强。黄河中下游及以南形成异常环流辐合带,由El Ni o导致的降水正异常最有可能出现在这一西南-东北的带状区域。对衰减的La Ni a响应大致相反。 |
| 关 键 词： | 气候学 亚洲夏季风 ENSO 中国夏季降水 |
| 收稿时间： | 2010/7/22 0:00:00 |
| 修稿时间： | 2010/11/6 0:00:00 |
THE RELATIONSHIPS BETWEEN ENSO AND JJA RAINFALL OVER THE EAST OF CHINA |
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| ZHANG Li-ping,ZHANG Le-fei and ZENG Fan-ping.THE RELATIONSHIPS BETWEEN ENSO AND JJA RAINFALL OVER THE EAST OF CHINA[J].Journal of Tropical Meteorology,2012(2):177-186. | |
| Authors: | ZHANG Li-ping ZHANG Le-fei and ZENG Fan-ping |
| Institution: | Wuhan Regional Climate Center, Wuhan 430074, China;The State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan 430079, China;Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430079, China |
| Abstract: | Related vectors for the difference between January and June of El Niño 3.4 and JJA 200 hPa and 850 hPa winds are calculated, and both JJA anomalous rainfall over the east of China and the west Pacific subtropical high after medium or strong El Niño/La Niña events are analyzed. The results indicated that at either high-or low-level circulation, the west Pacific subtropical high is sensitive to ENSO after the mid-1970s. In response to a decaying El Niño, the South Asian High is eastward in JJA, the west Pacific subtropical high is strong and located westward and southward, South China Sea summer monsoon and Indian monsoon are weakening, subtropical monsoon over on the south of the lower reach of the Yellow River is strong. Convergence zones of anomalous circulation are over the middle and lower reaches of the Yellow River and areas to its south. Anomalous JJA rainfall caused by El Niño is probable over this south-west to north-east zone. As La Niña decays, roughly the contrary happens. |
| Keywords: | Climatology Asian summer monsoon ENSO JJA rainfall over the east of China |
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