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首页> 外文期刊>International Journal of Climatology: A Journal of the Royal Meteorological Society >Detecting summer rainfall enhancement within metropolitan Atlanta, Georgia USA
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Detecting summer rainfall enhancement within metropolitan Atlanta, Georgia USA

机译：在美国乔治亚州亚特兰大市检测夏季降雨的增加

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摘要

This paper presents a methodology for detecting summer rainfall enhancement within a metropolitan area. The chosen study domain is the Atlanta, Georgia USA metropolitan area, and the time period covers summer (i.e. June-August) seasons from 1949 to 2005. In order to determine if observed heavy-rainfall frequencies at nine candidate stations in the metropolitan area are enhanced, predicted frequencies are derived from heavy-rainfall frequencies at seven reference stations located more than 50 km from downtown Atlanta. Both parametric and non-parametric tests are used to test for significant differences between observed frequencies and predicted frequencies within 29 overlapping 30 year periods (i.e. climatological periods). Norcross, which was similar to 30 km northeast of downtown Atlanta and thus was typically downwind of urbanized Atlanta on heavy-rainfall days at all candidate stations, was the only station to exhibit significant rainfall enhancement. The final ten climatological periods exhibited enhancement, with observed frequencies of >= 30 mm days for those periods being at least 20% larger than predicted frequencies. It is hoped the methods employed in this paper can be used in other metropolitan areas. Copyright (C) 2007 Royal Meteorological Society.
机译：本文提出了一种用于检测大都市地区夏季降雨量增加的方法。选择的研究领域是美国佐治亚州亚特兰大都会区，该时间段涵盖了1949年至2005年的夏季（即6月至8月）季节。为了确定在该都会区的9个候选站点观测到的暴雨频率是否为从距亚特兰大市中心50公里以上的七个参考站的暴雨频率得出增强的预测频率。参数测试和非参数测试均用于测试在30个重叠的29年周期（即气候周期）内观察到的频率与预测频率之间的显着差异。诺克罗斯（Norcross）类似于亚特兰大市区东北30公里，因此在所有候选站都处于大雨天，通常是亚特兰大市区下风，是唯一降雨显着增加的站。最后的十个气候周期表现出增强，这些周期的观测频率> = 30 mm天至少比预测频率大20％。希望本文采用的方法可以在其他大城市地区使用。皇家气象学会（C）2007。

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