Climatology of extreme rainfall and flooding from orographic thunderstorm systems in the upper Arkansas River basin
Climatology of extreme rainfall and flooding from orographic thunderstorm systems in the upper Arkansas River basin
复制标题
阿肯色河流域上游地形雷暴系统极端降雨和洪水的气候学
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. A. Ntelekos
中科院分区：
文献类型：
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作者：
Julie Rose N. Javier;J. Smith;J. England;M. Baeck;M. Steiner;A. A. Ntelekos
基于1995-2003年普韦布洛WSR - 88D雷达的体扫描反射率观测，对科罗拉多州普韦布洛上空阿肯色河流域极端降雨的时空分布进行了分析。编制了9年期间66次降雨事件的风暴目录。极端降雨的气候学分析是从欧拉的角度进行的，在欧拉的角度中，固定地点的降雨分布方面被检查，从拉格朗日的角度中，降雨的分布方面基于风暴跟踪算法。特别令人感兴趣的是在阿肯色河上游盆地复杂地形中极端降雨的空间异质性。拉格朗日分析用于表征风暴起爆、风暴运动和风暴结构的空间变化分布。气候分析表明，卡农市上方阿肯色河流域（流域面积8070 km2）的对流降雨并没有导致阿肯色河在普韦布洛（流域面积12140 km2）的极端洪水响应。阿肯色河流域暖季降水具有明显的日变化特征，这种极端降水特征是阿肯色河上游流域洪水响应的关键因素。研究了阿肯色河上游流域极端降雨的气候分析，并将其与该流域发生的极端洪水事件（包括1921年6月和1965年6月的主要洪水事件）的降雨时空特征进行了比较。
Analyses of the spatial and temporal distribution of extreme rainfall in the Arkansas River basin above Pueblo, Colorado, are based on volume scan reflectivity observations from the Pueblo WSR‐88D radar during the period 1995–2003. A storm catalog of 66 rainfall events during the 9‐year period has been developed. Climatological analyses of extreme rainfall are carried out both from an Eulerian perspective, in which distributional aspects of rainfall at fixed locations are examined, and from a Lagrangian perspective, in which distributional aspects of rainfall are based on storm‐tracking algorithms. Of particular interest is the spatial heterogeneity of extreme rainfall in the complex terrain of the upper Arkansas River basin. Lagrangian analyses are used to characterize the spatially varying distribution of storm initiation, storm motion, and storm structure. Climatological analyses indicate that convective rainfall in the Arkansas River basin above Canon City (drainage area of 8070 km2) does not contribute to the extreme flood response of the Arkansas River at Pueblo (drainage area of 12,140 km2). There is pronounced diurnal variation in warm season rainfall in the Arkansas River basin, and this feature of extreme rainfall is a key element of flood response in the upper Arkansas River basin. Climatological analyses of extreme rainfall in the upper Arkansas River basin are examined relative to the spatial and temporal properties of rainfall for extreme flood events that have occurred in the basin, including major flood episodes in June 1921 and June 1965.