.png){kind=icon}
.png){kind=icon}
Return
The role of atmospheric river in the unprecedented extreme precipitation event over Henan in July 2021
.png){kind=icon}
PRE
AI
Y
K
梁
DOI：10.1016/j.atmosres.2026.108877.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The unprecedented extreme precipitation event occurred in Henan Province, the third most populated province in China, resulting in tremendous damage, casualties, and widespread public concern. This study investigates the atmospheric river (AR) environments and the related precipitation during the Henan extreme precipitation event using an AR detection algorithm. The diagnostic field generated by the algorithm indicates that an enhanced vertically integrated water vapor transport was identified as an AR developing over the target region, with its upstream detected over Henan lasting about 30-h. Analyses of moisture and dynamic conditions indicate that the AR formed in warm-core structures, characterized by a pre-frontal low-level jet of an upper-level trough embedded within the plume. The large-scale steering flows, resulting from the interaction between the binary tropical cyclones (TCs) and the western Pacific subtropical high, transported the upstream moisture originating from the TCs Infa and Cempaka to the AR plume over Henan. During the event, the extreme precipitation intensity in Henan was directly linked to the degree of AR influence locally. The dominant forcing mechanism for the AR-related precipitation was primarily attributed to the dynamical forcing ascent as the AR impinging on the mountainous topography near Henan, which was characterized by the saturated upslope flow within the water vapor transport associated with the AR. This paper highlights the role of AR and its interaction with TCs in the unprecedented extreme precipitation event, which emphasizes the importance of promoting local knowledge of AR-related hydrometeorological environments and their destructive impacts in the mid-latitudes of East Asia.
Keywords:
Atmospheric river
Extreme precipitation
Tropical cyclone
Moisture and dynamic conditions
Dynamical forcing ascent
Journal
IF:
4.4
Papers:
1.1K
Citations:
2.2W
Organization
Cited Papers