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首页> 外文会议>Atmospheric and Environmental Remote Sensing Data Processing and Utilization III: Readiness for GEOSS; Proceedings of SPIE-The International Society for Optical Engineering; vol.6684 >The Relationship between the Interdecadal Variability of East Asian Summer Monsoon's Movement and the Spatial Distribution Pattern of the Summer Rainfall in East China
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The Relationship between the Interdecadal Variability of East Asian Summer Monsoon's Movement and the Spatial Distribution Pattern of the Summer Rainfall in East China

机译：东亚夏季风运动年代际变化与中国东部夏季降水空间分布格局的关系

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摘要

Using daily rainfall measurements from 740 stations across China and European Centre for Medium-Range Weather Forecasts (ECMWF) upper air reanalysis daily data (1958-2001), we give out climatically characters of East Asian summer monsoon's (EASM) movement with the definition of the EASM's front, finding out that the transfer of the rain belt over East China is consistent with the advance and retreat of the EASM. By the EOF (empirical orthogonal function) analysis of the gridded EASM's index (average for the 28th-45th pentad) from 1958 to 2001 in area (105oE-150°E,15oN-55°N), it is founded that, the second mode of the EOF analysis exhibits interdecadal variations and indicate that the movement of EASM has three interdecadal abrupt changes in 1965, 1980 and 1994, respectively. Therefore, the three interdecadal abrupt changes bring the different processes of the EASM's movement and lead to the obvious change of the spatial distribution pattern of summer rainfall in East China directly, especially prior to 1965, the rainfall in the mid-lower reaches of the Yangtze River is much less than normal, while the precipitation is much more in South China, North China and Northeast China but with decreasing continuously since 1965. However, the rainfall in the mid-lower Yangtze Valley increases continually from 1980, especially from 1994 the rainfall in South China and the Yangtze Valley increases rapidly while the precipitation over North China was much less than normal. Therefore, in East China underwent from the pattern of south- drought and northern- waterlog before 1979 to south-waterlog and north- drought.
机译：利用中国740个站点​​的日降水量测量值以及欧洲中距离天气预报中心（ECMWF）的高空再分析每日数据（1958-2001），我们得出了东亚夏季风（EASM）的气候特征，其定义为EASM的前部，发现雨带在华东的转移与EASM的进退是一致的。通过对1958年至2001年区域（105oE-150°E，15oN-55°N）范围内的EASM网格指数（28-45 penta的平均值）进行EOF（经验正交函数）分析，得出第二个EOF分析的模式显示年代际变化，表明EASM的运动分别在1965年，1980年和1994年发生了三个年代际突变。因此，这三个年代际突变导致东亚夏季风运动的不同过程，直接导致华东地区夏季降水的空间分布格局发生明显变化，尤其是1965年以前，长江中下游地区河流远远少于正常水平，而华南，华北和东北地区的降水量却更多，但自1965年以来一直在减少。但是，长江中下游地区的降水量从1980年开始持续增加，尤其是1994年以来华南和长江流域的降水迅速增加，而华北的降水却大大低于正常水平。因此，华东地区经历了从1979年以前的南旱北涝格局到南涝和北旱格局。

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