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| 青藏高原—季风水汽输送“大三角扇型”影响域特征与中国区域旱涝异常的关系 | |
| 引用本文： | 徐祥德,陶诗言,王继志,陈联寿,周丽,王秀荣.青藏高原—季风水汽输送“大三角扇型”影响域特征与中国区域旱涝异常的关系[J].气象学报,2002,60(3):257-266. |
| 作者姓名： | 徐祥德 陶诗言 王继志 陈联寿 周丽 王秀荣 |
| 作者单位： | 1. 中国气象科学研究院,北京,100081 2. 中国科学院大气物理研究所,100080 3. 国家气象中心,北京,100081 |
| 基金项目： | 国家科技部“东亚季风科学试验”预研究(2 0 0 1CCB0 0 40 0 )，国家攀登B类青藏高原试验项目 (940 2 110 0 5 ) |
| 摘 要： | 文中分析了南亚季风水汽输送关键区“大三角扇型”区域特征 ,即该区域以高原地区为顶端 ,南海季风与印度季风涉及的低纬活动源区为“底边”构成了类似“大三角扇型”的南亚季风水循环相关影响域 ,此“大三角扇型”水汽输送特征分布描述了副热带高压环流以及中纬度扰动等亚洲季风系统成员的总体动力影响效应 ;反映了该区域南半球跨赤道气流 ,赤道西太平洋季风槽及季风活动等水份循环特征。表现了东亚海陆热力强迫、青藏高原非绝热效应、海洋“暖池”及异常孟加拉湾对流活动等诸因素的综合影响。研究表明 ,大三角区域热源强信号源 (高原地 气与孟加拉湾、菲律宾、南海等海 气过程 )区域的水份循环时空演变、遥相关特征及其对亚洲季风爆发的综合影响等均是认识中国及东亚旱、涝异常成因的重要科学问题 |
| 关 键 词： | 青藏高原 高原—季风 水汽输送 “大三角扇型”影响域 旱涝异常 |
| 收稿时间： | 3/5/2001 12:00:00 AM |
| 修稿时间： | 2001年3月5日 |
THE RELATIONSHIP BETWEEN WATER VAPOR TRANSPORT FEATURES OF TIBETAN PLATEAU-MONSOON "LARGE TRIANGLE" AFFECTING REGION AND DROUGHT-FLOOD ABNORMALITY OF CHINA |
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| Xu Xiangde,Tao Shiyan,Wang Jizhi,Chen Lianshou,Zhou Li and Wang Xiurong.THE RELATIONSHIP BETWEEN WATER VAPOR TRANSPORT FEATURES OF TIBETAN PLATEAU-MONSOON "LARGE TRIANGLE" AFFECTING REGION AND DROUGHT-FLOOD ABNORMALITY OF CHINA[J].Acta Meteorologica Sinica,2002,60(3):257-266. | |
| Authors: | Xu Xiangde Tao Shiyan Wang Jizhi Chen Lianshou Zhou Li and Wang Xiurong |
| Institution: | Chinese Academy of Meteorological Sciences, Beijing 100081;Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100080;National Meteorological Center, Beijing 100081;Chinese Academy of Meteorological Sciences, Beijing 100081;Chinese Academy of Meteorological Sciences, Beijing 100081;Chinese Academy of Meteorological Sciences, Beijing 100081 |
| Abstract: | By using the NCEP reanalysis water vapor transport flux data, the Doppler radar echoes in middle plateau of TIPEX, the satellite water vapor imagery, the time cross section of satellite remotely sensed TBB and the dynamic variation of satellite images, the relationship between water vapor transport features of Tibetan Plateau-Monsoon "Large Triangle affecting region" and drought flood abnormal of China has discussed in this study. It is shown that the water vapor channel is related to the outbreak of Asia monsoon, air land process on the Plateau and the special abnormal structure of water vapor over the Plateau. The functions of heat sources in low and middle latitude oceans all appear in this area, namely the area where exists the interaction between Plateau and monsoon as well as activities for its members. This "large triangle" affecting of the Plateau and monsoon has been described. Thus, the southerly water vapor transport feature in the "large triangle" affecting region shows that there exists teleconnection between the Plateau and low latitude ocean heat sources and water vapor sources. The result shows that the source of strong connective cloud as well as its tracks of the torrential rain process in 1998 is closely related to the water vapor transport features in the "large triangle" affecting region. It is also called "transfer platform". Analysis on the climate averaged water vapor flow feature in the "large triangle" region shows that the Tibetan Plateau is an important transfer platform on the west edge of Meiyu in Yangtze River Valley in east China in summer. The interaction between topographic effect of the Plateau and the monsoon water vapor flow at the south edge forms the transport of strong water vapor flow from the Plateau to Yangtze River Valley. Different from the usual flood years, the strong westerly water vapor flow transported from the "transfer platform" of the Plateau during the formation process of the torrential rain in July 1998 is especially significant. Thus, during the flood process of Yangtze River Valley in 1998, the Plateau thermal and dynamic functions and abnormal monsoon interaction are different from those of usual flood years. The feature that the water vapor flow from the south turns into strong westward one after passing through the Plateau is very significant. Above water vapor features may be one of the important abnormal elements of East Asian water vapor cycle that form the abnormal flood in 1998. |
| Keywords: | Tibetan Plateau Plateau-Monsoon Water vapor transport "Large triangle" affecting region Drought flood abnormalilty |
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