A Climatology of the Vertical Structure of Water Vapor Transport to the Sierra Nevada in Cool Season Atmospheric River Precipitation Events
A Climatology of the Vertical Structure of Water Vapor Transport to the Sierra Nevada in Cool Season Atmospheric River Precipitation Events
复制标题
冷季大气河降水事件中内华达山脉水汽输送垂直结构的气候学
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
J. Mejía
中科院分区：
文献类型：
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作者：
Tracy M. Backes;M. Kaplan;R. Schumer;J. Mejía
摘要
本研究呈现了内华达山脉上方在重要的凉季（11月 - 4月）降水事件期间水汽通量垂直结构的气候学特征。对大气河（AR）和非大气河事件进行了分析，以更好地理解这种结构对降水模式的影响。研究考察了1974年至2012年太浩湖盆地周围七个气象站凉季降水的每日测量值，以及1948年至2012年期间沿内华达山脉山脊的美国国家环境预报中心/气候预测中心（NCEP/CPC）网格化的每日降水分析。利用美国国家环境预报中心 - 美国国家大气研究中心（NCEP - NCAR）再分析资料和奥克兰的探空资料来研究高层大气状况，包括风暴日低空和中空急流对水汽的输送情况，以及与显著降水事件相关的上游静力稳定度。主要研究结果如下：1）在凉季，大气河在太浩湖盆地降水的产生中起着不成比例的巨大作用；2）强烈的中空水汽输送需要与低空……
AbstractThis study presents the climatology of the vertical structure of water vapor flux above the Sierra Nevada during significant cool season (November–April) precipitation events. Atmospheric river (AR) and non-AR events are analyzed to better understand the effect of this structure on precipitation patterns. Daily measurements of cool season precipitation at seven weather stations around the Tahoe basin from 1974 to 2012 and NCEP/CPC gridded daily precipitation analysis along the Sierra crest for the period 1948–2012 are examined. NCEP–NCAR reanalysis and soundings from Oakland are used to look at upper atmospheric conditions, including the presence of vapor transport by low- and midlevel jets on storm days as well as upstream static stability in relation to significant precipitation events. Key findings are as follows: 1) ARs play a disproportionately large role in generating Tahoe basin precipitation during the cool season; 2) strong midlevel vapor transport needs to occur in tandem with low-level ...
影响因子：
4.6
作者：
Jinwon Kim;D. Waliser;P. Neiman;B. Guan;Ju-Mee Ryoo;G. Wick
通讯作者：
Jinwon Kim;D. Waliser;P. Neiman;B. Guan;Ju-Mee Ryoo;G. Wick