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Variability and trends in daily precipitation extremes on the northern and southern slopes of the central Himalaya

机译：喜马拉雅山中部北坡和南坡的每日极端降水量的变化和趋势

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摘要

This study focuses on the precipitation extremes recorded on the northern and southern slopes of the central Himalaya, especially those documented at higher altitudes. Daily precipitation data recorded over a 35-year period at nine meteorological stations in the region were studied. We used the precipitation extreme indices delineated by the Expert Team on Climate Change Detection and Indices (ETCCDI). The spatial and temporal variations in these precipitation extremes were calculated. When regional patterns were investigated to detect any anomalies, only 1 of the 10 precipitation extreme indices from the southern slopes of the central Himalaya showed a statistically significant trend; none from the northern slopes of the central Himalaya highlighted a statistically significant trend. On the southern slopes, all indices increased, apart from the maximum 1-day precipitation (RX1) and simple daily precipitation intensity (SDII) indices. Indices such as the consecutive dry days (CDDs) and RX1 indices exhibited similar increases on both the northern and southern slopes of the central Himalaya. These results suggest that increases in precipitation have been accompanied by an increasing frequency of extremes over the southern central Himalaya. Nonetheless, no relation could be established between the precipitation extreme indices and circulation indices for higher altitudes.
机译：这项研究的重点是喜马拉雅山中部北部和南部斜坡上记录的极端降水，特别是在海拔较高的地区。研究了该地区九个气象站在35年期间记录的每日降水数据。我们使用了气候变化检测和指数专家组（ETCCDI）所描述的极端降水指数。计算了这些极端降水的时空变化。当调查区域格局以发现任何异常时，喜马拉雅中部南坡的10个降水极端指数中只有1个具有统计上的显着趋势。喜马拉雅中部北坡的任何一个都没有突出统计上的显着趋势。在南部斜坡上，除了最大的1天降水（RX1）和简单的每日降水强度（SDII）指数以外，所有指数均增加。喜马拉雅中部的北部和南部斜坡上的连续干旱天数（CDDs）和RX1指数等指标均表现出相似的增长。这些结果表明，降水量的增加伴随着喜马拉雅山南部中部的极端频率增加。但是，在更高海拔的降水极端指数和环流指数之间无法建立任何关系。

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  • 来源
    《Theoretical and applied climatology》 |2017年第2期|571-581|共11页
  • 作者

    Sigdel Madan; Ma Yaoming;

  • 作者单位

    Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China|Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China|Tribhuvan Univ, Cent Dept Hydrol & Meteorol, Kathmandu, Nepal;

    Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China|Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Precipitation; Trends; Extreme; Himalaya;

    机译：降水;趋势;极端;喜马拉雅山;

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