| 梅雨期区域边界水汽输送模型及其数值试验 |
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| 作者姓名： | XU Xiangde MIAO Qiuju WANG Jizhi ZHANG Xuejin |
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| 作者单位： | Chinese Academy of Meteorological Sciences，Chinese Academy of Meteorological Sciences，Chinese Academy of Meteorological Sciences，North Beijing 100081，Beijing 100081，Beijing 100081，Carolina State University，Raleigh，NC 27606—8208，U.S.A. |
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| 基金项目： | the research item of the second Tibetan Plateau Experiment. |
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| 摘 要： | 通过诊断分析,提出梅雨期中国区域边界水汽输送特征模型,即高原中部区域西边界与低纬南海、西太平洋南边界为水汽输送流入主体,西太平洋东边界为水汽“流出”主体。数值模拟研究表明:1998年洪涝特大暴雨过程6月与7月份水汽输送通道特征存在差异,6月中下旬长江流域暴雨过程以西边界与南边界水汽流共同输送为主体,其中南海西太平洋区域水汽输送显著,7月份水汽输送过程以高原中部区域西边界“水汽流”为主体。因此,高原中部区域西边界与中国区域南边界的水汽输送对长江流域特大暴雨的形成均具有重要的作用。区域边界水汽流的时空特征分析及其理论模型将为长江流域暴雨预报提供科学依据。
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| 关 键 词： | 水汽流 暴雨 长江流域 梅雨期 |
| 收稿时间： | 28 February 2002 |
The water vapor transport model at the regional boundary during the Meiyu period |
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| XU Xiangde,MIAO Qiuju,WANG Jizhi,ZHANG Xuejin.The water vapor transport model at the regional boundary during the Meiyu period[J].Advances in Atmospheric Sciences,2003,20(3):333-342. |
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| Authors: | Xu Xiangde Miao Qiuju Wang Jizhi Zhang Xuejin |
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| Institution: | Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,North Carolina State University, Raleigh, NC 27606-8208, U.S.A. |
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| Abstract: | The water vapor transport model at the regional boundary in the Meiyu period is put forward throughdiagnostic analysis. The numerical simulation on the water vapor transport at the boundary of China inthe heavy rainfall period during June-July 1998 shows that the feature of water vapor transport in June isdifferent from that in July. The main body of the water cycle that forms the torrential rain in the Yangtze River Valley is made up of water vapor transport at the western and southern boundaries of the Chinaregion in June, whereas the water vapor flow at the western boundary in middle Tibet turns out to bethe main body of water vapor sources in July. The water vapor transport at the western boundary ofthe Tibetan Plateau and the southern boundary of China plays an important role in the torrential rainin the Yangtze River Valley. The temporal and spatial distribution characteristics of water vapor flow atthe regional boundary and their theoretical model would provide the scientific proof for the heavy rainforecasts in the Yangtze River Valley. |
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| Keywords: | water vapor flow torrential rain Yangtze River Valley Meiyu period |
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