2023
DOI: 10.3390/su15064875
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The Key Mesoscale Systems and Mesoscale Vortices of the Henan Extreme Precipitation in 2021

Abstract: Based on the Doppler weather radar and surface observations, the key mesoscale systems and features of the rainstorm structure during the period of the extreme precipitation in Henan province on 20 July 2021 are investigated. The results show that a nearly meso-α-scale West Henan Low Vortex (WHLV) near the Songshan Mountain, a surface mesoscale front, a horizontal shear convergence line in the lower troposphere and two strong low-level jets (LLJs) were the main mesoscale systems that triggered the extreme prec… Show more

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“…After traversing a considerable distance, when these southeast airflows reach Henan province, their associated moisture flux value decreases to approximately 1.4 kg•m -2 •s -1 . Due to the presence of mountainous terrain on the western side of Henan province, this airflow encounters obstruction and converges in front of them (Wang et al, 2023). Furthermore, this stable atmospheric condition persisted for a week, leading to exceptional precipitation events within the province.…”
Section: Water Vapor Transportmentioning
confidence: 99%
“…After traversing a considerable distance, when these southeast airflows reach Henan province, their associated moisture flux value decreases to approximately 1.4 kg•m -2 •s -1 . Due to the presence of mountainous terrain on the western side of Henan province, this airflow encounters obstruction and converges in front of them (Wang et al, 2023). Furthermore, this stable atmospheric condition persisted for a week, leading to exceptional precipitation events within the province.…”
Section: Water Vapor Transportmentioning
confidence: 99%