Summertime Rainfall Events in Eastern Washington and Oregon
Summertime Rainfall Events in Eastern Washington and Oregon
复制标题
华盛顿州东部和俄勒冈州夏季降雨事件
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
R. Barbour
中科院分区：
文献类型：
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作者：
A. Chiodi;N. Bond;N. Larkin;R. Barbour
摘要西北太平洋夏季降雨事件的时空特征与当前区域500 hPa高度场条件有关，主要集中在华盛顿东部和俄勒冈州东北部的森林斜坡，事件的发生与否在很大程度上决定了荒地火灾季节的开始和结束。每日美国统一降水数据集用于指定降雨事件（1949-2008年期间）。事件定义为连续一天或多天降雨量超过0.25英寸。(0.65在喀斯喀特山主峰以东的重点区域，夏季（7 - 9月）平均发生2 - 3次，7月下旬发生频率最低。在感兴趣的领域的北方部分，并在较高的地形，一个相对较高的百分比的事件，与异常对流层中部西南气流;在南部和低海拔部分的事件的百分比较高的do...
AbstractThe temporal and spatial characteristics of summertime rainfall events in the Pacific Northwest are examined in relation to the prevailing regional 500-hPa geopotential height conditions, with focus on the forested slopes of eastern Washington and northeastern Oregon, where the absence/occurrence of events largely determines the start and end of the wildland fire season. The Daily U.S. Unified Precipitation dataset is used for specifying rainfall events (period 1949–2008). Events are defined as one or more consecutive days of rainfall exceeding 0.25 in. (0.65 mm), and occur on average two to three times per summer (July–September) in the focus region, east of the Cascade Mountain crest, with a minimum in frequency in late July. A relatively high percentage of the events in the northern portion of the domain of interest, and over the higher terrain, is associated with anomalous midtropospheric southwesterly flow; a high percentage of the events in the southern and lower elevation portions of the do...
影响因子：
4.4
作者：
Sillmann, J.;Kharin, V. V.;Bronaugh, D.
通讯作者：
Bronaugh, D.