An Hourly and Multi-Hourly Extreme Precipitation Climatology for the UK and Long-Term Changes in Extremes
An Hourly and Multi-Hourly Extreme Precipitation Climatology for the UK and Long-Term Changes in Extremes
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DOI：
10.1061/9780784413609.139
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发表时间：
2014-06
影响因子：
4.7
通讯作者：
S. Blenkinsop;H. Fowler
中科院分区：
文献类型：
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作者：
S. Blenkinsop;H. Fowler
极端次日降水可能与山洪暴发有关，特别是在城市地区，但在英国研究相对较少。本文描述了基于三种不同来源的雨量计数据构建英国每小时降水数据集的初步工作。我们认识到使用翻斗雨量计分析长期气候和气候变率时存在的重大问题，并介绍了质量控制程序。初步分析反映了产生次日降水的不同机制，但在英国大部分地区，最大的总降水量通常出现在夏季。在过去30年中，观测到平均每小时降水强度的一些显著的长期趋势，但在年最大值方面几乎没有发现显著的趋势。还可以探测到时间序列中的重要断点，在某些情况下可能表明降水状况发生了变化。
Extremes of sub-daily precipitation may be associated with flash flooding, particularly in urban areas, but have been studied relatively little in the UK. This paper describes initial work on the construction of a dataset of hourly precipitation for the UK, based on three different sources of rain gauge data. Significant problems in the use of tipping bucket rain gauges for the analysis of long term climate and climate variability are recognised and quality control procedures are described. Initial analysis reflects the different mechanisms that generate sub-daily precipitation but in most parts of the UK the largest totals generally occur in summer. Some significant long term trends in mean hourly precipitation intensity are observed over the last 30 years but few significant trends in annual maxima are detected. Significant break points in the time series are also detected and may in some cases suggest a shift in the precipitation regime.