Decadal variation of different durations of continuous Meiyu precipitation and the possible cause
Decadal variation of different durations of continuous Meiyu precipitation and the possible cause
复制标题
梅雨连续降水不同历时的年代际变化及可能成因
DOI：
10.1007/s11434-010-4241-x
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发表时间：
2011-03
期刊：
影响因子：
--
通讯作者：
KUANG XueYuan
中科院分区：
文献类型：
--
作者：
Huang Danqing;ZHU Jian;KUANG XueYuan
本文从低层季节内振荡（ISO）的角度，分析了不同持续时间梅雨降水的年代际演变特征及其可能原因。结果表明，一定持续时间的梅雨降水事件总频数随事件持续时间的增加而逐渐减少，且事件的主中心由江淮北方流域向江淮南部移动。不同持续时间梅雨降水的线性变化趋势表明，自2000年以来，长持续时间的降水明显减少，而2 d和3-4 d的连续降水过程增多。同时，低层ISO的变化与较长时间梅雨期降水频数的年代际演变有着密切的关系。显然，自2000年以来，低层ISO显著减少，持续时间较长的事件的单峰已被持续时间较短的事件的几个峰值所取代，这导致了持续时间较长的降水频率显著减少。同时，低层斜压性在各时段都有增加（减少）的趋势，这与较长时间降水频率的增加（减少）是一致的。据证实，较长时间的降水近年来已显着减少。
The features of the decadal evolution of different durations of continuous Meiyu precipitation and their possible cause from the viewpoint of the low-level intraseasonal oscillation (ISO) are examined in this study. It is found that the total frequency of Meiyu precipitation events of certain duration gradually decreases as the duration of the events increases, and the main center of the events moves from the northern Yangtze-Huaihe River Valley (YHRV) to the southern YHRV. The linear trends of different durations of continuous Meiyu precipitation indicate that longer-duration precipitation has become significantly less frequent since 2000, while 2-day and 3–4-day continuous precipitation processes have become more frequent. At the same time, a close relationship between the variation in the low-level ISO and the decadal evolution of frequency of longer-duration Meiyu precipitation is detected. Clearly, since 2000, the low-level ISO has significantly decreased, and a single peak of longer-duration events has been replaced by several peaks of shorter-duration events, which has resulted in a significant decrease in the frequency of longer-duration precipitation. Meanwhile, low-level baroclinicity increased (decreased) during each period, which is in accordance with the increasing (decreasing) frequency of longer-duration precipitation. It is confirmed that longer-duration precipitation has significantly decreased in recent years.
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影响因子：
3.1
作者：
Wei‐Chyung Wang;J. Pinto;Y. Yung
通讯作者：
Wei‐Chyung Wang;J. Pinto;Y. Yung
影响因子：
1.2
作者：
Zhao Er-xu
通讯作者：
Zhao Er-xu
DOI：
--
发表时间：
2006
期刊：
Climatic and Environmental Research
影响因子：
--
作者：
Huang Gang
通讯作者：
Huang Gang
影响因子：
5.2
作者：
Gong, DY;Ho, CH
通讯作者：
Ho, CH
影响因子：
--
作者：
Zhu Xiaying;He Jinhai;Wu Zhiwei
通讯作者：
Zhu Xiaying;He Jinhai;Wu Zhiwei