Moisture Sources and Transport for Extreme Precipitation Over Henan in July 2021
Moisture Sources and Transport for Extreme Precipitation Over Henan in July 2021
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DOI：
10.1029/2021gl097446
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发表时间：
2022-02
影响因子：
5.2
通讯作者：
Yanbo Nie;Jianqi Sun
中科院分区：
文献类型：
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作者：
Yanbo Nie;Jianqi Sun
确定2021年7月河南特大降水事件的水汽来源有助于了解此类极端降水事件的机制。在这项研究中，使用拉格朗日方法的事件的水分来源和运输轨迹进行了调查。水汽通过沿着三条路径输送到河南，这三条路径分别是西太平洋副热带高压、西太平洋副热带高压与热带气旋英发、西太平洋副热带高压与热带气旋森帕卡。WPSH-In-Fa-驱动的空气包裹在三条路线中具有最高的润湿和沉淀效率。总的来说，中国南部对水汽来源的贡献最大（38.1%），其次是西北太平洋（30.0%）。结果表明，中国南部-西北太平洋的陆面水汽和海洋水汽对河南省的极端降水事件都起着至关重要的作用。
Determining the sources of moisture for the devastating precipitation event over Henan in July 2021 helps understand the mechanisms of such extreme precipitation events. In this study, the moisture sources and transport trajectories for the event are investigated using a Lagrangian approach. Moisture is transported to Henan along three routes that are driven by the western Pacific subtropical high (WPSH), WPSH and the tropical cyclone In‐Fa, as well as WPSH and the tropical cyclone Cempaka, respectively. The WPSH‐In‐Fa‐driven air parcels have the highest moistening and precipitating efficiency among the three routes. Overall, southern China contributes the most to moisture sources (38.1%), followed by the western North Pacific (30.0%). The results indicate that the terrestrial and oceanic moisture over southern China‐western North Pacific are both crucial for the extreme precipitation event over Henan.