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首页> 外文会议>WMO 3rd international conference on quantitative precipitation estimation and quantitative precipitation forecasting and hydrology : extended abstract volume. >Spatial and Temporal Variations of Extreme Precipitation Events in the Huaihe River Basin,China
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Spatial and Temporal Variations of Extreme Precipitation Events in the Huaihe River Basin,China

机译：淮河流域极端降水事件的时空变化

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@@ 1. Introduction The spatial and temporal variations of extreme precipitation events are the direct source of flood and drought hazards. One of the major concerns related to anthropogenic climate change is an increase in extreme events that could have a profound impact on both human society and the natural environment. The fourth assessment report (AR4) of the Intergovemmental Panel on Climate Change (IPCC) pointed out extreme precipitation events in many mid latitude regions were likely to increase, and the total area affected by drought since the 1970s has been likely to increase (Alexander et al., 2006; IPCC, 2007). These results described the general trends in extreme precipitation events at a large spatial scale, but the changes in particular regions were not conclusive (Kunkel, 2003; Wang et al., 2008) and need to be assessed. Regional differences in extreme climate events can be great. In general, increasing temperatures speed up the water cycling process, which can possibly result in increases in precipitation amount and intensity.However, no trend or significant downward trends in extreme precipitation events have also been found in some areas due to variabilities such as topography and local circulation. The objectives of this study were to analyze the temporal trends and their spatial distribution for each extreme precipitation indicator. Based on the daily observational data of 26 stations in the Huaihe River Basin (HRB), spatial and temporal variations of extreme precipitation in the last 48 years are analysed in the present study. The detailed analysis on trends of the extreme precipitation events at a regional scale is important to forecast and reduce the climate induced flood risks and provide information for rational countermeasures.
机译：@@ 1.引言极端降水事件的时空变化是洪水和干旱灾害的直接来源。与人为气候变化有关的主要关切之一是极端事件的增加，这可能对人类社会和自然环境都产生深远影响。政府间气候变化专门委员会（IPCC）的第四次评估报告（AR4）指出，许多中纬度地区的极端降水事件可能会增加，并且自1970年代以来受干旱影响的总面积可能会增加（Alexander等等，2006； IPCC，2007）。这些结果描述了在较大的空间尺度上极端降水事件的总体趋势，但是在特定区域的变化尚无定论（Kunkel，2003； Wang等，2008），需要进行评估。极端气候事件的地区差异可能很大。通常，升高温度会加快水循环过程，这可能会导致降水量和强度增加。然而，由于地形和地形等变化，在某些地区也未发现极端降水事件的趋势或明显下降趋势。局部流通。这项研究的目的是分析每个极端降水指标的时间趋势及其空间分布。基于淮河流域（HRB）26个台站的日常观测资料，分析了近48年来极端降水的时空变化。对区域范围内极端降水事件趋势的详细分析对于预测和减少气候诱发的洪水风险并为合理的对策提供信息很重要。

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