Water Vapor Transport Paths and Accumulation during Widespread Snowfall Events in Northeastern China
Water Vapor Transport Paths and Accumulation during Widespread Snowfall Events in Northeastern China
复制标题
中国东北地区大范围降雪期间的水汽输送路径和积聚
DOI：
10.1175/jcli-d-12-00300.1
复制
发表时间：
2013-07
影响因子：
4.9
通讯作者：
Wang Huijun
中科院分区：
文献类型：
--
作者：
Sun Bo;Wang Huijun
摘要本研究旨在明确中国东北部大范围降雪过程的水汽输送特征及其对大范围降雪的水汽供应作用。NEC的50个WS事件是根据1980年至2009年每隔12小时收集的累计降雨量计数据和一套合格的标准来选择的。利用6小时ECMWF中期再分析(ERA-TIMARY)资料，分析了西北太平洋WS事件期间西太平洋热带气旋的演变，并讨论了西北太平洋的西太平洋热带气旋路径和水汽收支。分析结果表明，在中国东部及其邻近海域和日本海上空输送水汽的偏南西风，在为西风提供水汽方面起到了关键作用，这与冬季西风的气候学有很大的不同。此外，结果还表明，WVT收支与降水之间有18h的滞后，导致在WS之前NEC有大量水汽积累。预聚的水蒸气的量。
AbstractThis study aims to identify the distinct characteristics of water vapor transport (WVT) and its role in supplying moisture for widespread snowfall (WS) events in northeastern China (NEC). Fifty WS events in NEC were selected based on cumulative precipitation gauge data taken at 12-h intervals from 1980 to 2009 and a qualified set of criteria. The evolution of WVT during WS events in NEC was analyzed using 6-h ECMWF Interim Re-Analysis (ERA-Interim) data and discussed in regard to WVT paths and water vapor budgets over NEC. The results of this analysis indicate that southerly WVT, which carries moisture over eastern China, its adjacent seas, and the Sea of Japan, has played a key role in supplying water vapor for WS, which is quite different from the climatology of winter WVT. Moreover, the results indicate that there tends to be an 18-h lag between the WVT budget and precipitation, resulting in a great amount of water vapor accumulating over NEC before WS. The amount of preaccumulated water vapor ...
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DOI：
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影响因子：
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