The upstream “strong signals” of the water vapor transport over the Tibetan Plateau during a heavy rainfall event in the Yangtze River Basin

2016 ◽  
Vol 33 (12) ◽  
pp. 1343-1350 ◽  
Author(s):  
Yang Zhao ◽  
Xiangde Xu ◽  
Bin Chen ◽  
Yinjun Wang
Keyword(s):  
Yangtze River ◽  
Heavy Rainfall ◽  
Yangtze River Basin ◽  
Rainfall Event ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Heavy Rainfall Event ◽  
The Tibetan Plateau ◽  
The Yangtze River ◽  
The Yangtze River Basin

scholarly journals On the Relationship of a Low-Level Jet and the Formation of a Heavy-Rainfall-Producing Mesoscale Vortex over the Yangtze River Basin

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 156
Author(s):  
Shen-Ming Fu ◽  
Huan Tang ◽  
Yu Li ◽  
Hui Ma ◽  
Jian-Hua Sun
Keyword(s):  
River Basin ◽  
Yangtze River ◽  
Heavy Rainfall ◽  
Yangtze River Basin ◽  
The Yangtze River ◽  
Cyclonic Vorticity ◽  
Low Level ◽  
The Yangtze River Basin ◽  
Low Level Jet ◽  
Vorticity Transport

Dabie vortices (DBVs) are a type of heavy-rainfall-producing mesoscale vortices that appear with a high frequency around the Dabie Mountain over the Yangtze River Basin. For a long time, scholars have found that DBVs tend to form when a low-level jet (LLJ) appears in their neighboring regions. However, the underlying mechanisms of this phenomenon still remain vague. This study furthers the understanding of this type of event by conducting detailed analyses on a long-lived eastward-moving DBV that caused a severe flood in the 2020 summer. It is found that the LLJ in this event was belonged to a nocturnal LLJ type, with its maximum/minimum appeared around 2100/0600 UTC. The diurnal cycle of LLJ affected precipitation and intensity of the DBV notably: As the LLJ intensified, vortex’s precipitation and intensity both enhanced, and vice versa. The LLJ exerted two effects on the DBV’s formation that are opposite to each other. The more important effect is that the LLJ caused intense lower-level convergence around its northern terminus. This convergence directly produced cyclonic vorticity through vertical stretching, which dominates the DBV’s formation and enhances the convection-related upward cyclonic vorticity transport that acted as another favorable factor. The less important effect is that (i) the LLJ induced import of anticyclonic vorticity into the vortex’s central region, which decelerated the DBV’s formation; and (ii) the LLJ-related to strong ascending motions tilted horizontal vorticity into negative vertical vorticity, which reduced the growth rate of cyclonic vorticity.

Study of 1998 heavy rainfall over the Yangtze River Basin using TRMM data

2001 ◽  
Vol 18 (3) ◽  
pp. 387-396 ◽  
Author(s):  
Cheng Minghu ◽  
He Huizhong ◽  
Mao Dongyan ◽  
Qi Yanjun ◽  
Cui Zhehu ◽  
...  
Keyword(s):  
River Basin ◽  
Yangtze River ◽  
Heavy Rainfall ◽  
Yangtze River Basin ◽  
The Yangtze River ◽  
The Yangtze River Basin

scholarly journals Rain Belt and Flood Peak: A Study of the Extreme Precipitation Event in the Yangtze River Basin in 1849

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2677
Author(s):  
Yuda Yang ◽  
Zhengrong Xu ◽  
Weiwei Zheng ◽  
Shuihan Wang ◽  
Yibo Kang
Keyword(s):  
River Basin ◽  
Extreme Precipitation ◽  
Yangtze River ◽  
Heavy Rainfall ◽  
Yangtze River Basin ◽  
The Yangtze River ◽  
Rain Belt ◽  
Flood Prevention ◽  
The Yangtze River Basin ◽  
Precipitation Events

Floods caused by extreme precipitation events, in the context of climate warming, are one of the most serious natural disasters in monsoon region societies. The great flood in the Yangtze River Basin in 1849, in Eastern China, was a typical extreme flood event. According to historical archives, local chronicles, diaries, and historical hydrological survey data, this study reconstructed the temporal and spatial patterns of extreme precipitation in 1849, and the flood process of the Yangtze River. We found four major precipitation events at the middle and lower reaches of the Yangtze River, from 18 May to 18 July 1849. The torrential rainfall area showed a dumbbell-like structure along the Yangtze River, with two centers distributed separately in the east and west. For the specific flood process of the Yangtze River, many tributaries of the Yangtze River system entered the flood season consecutively since April, and the mainstream of the Yangtze River experienced tremendous pressure on flood prevention with the arrival of multiple rounds of heavy rainfall. In mid-to-late July, the water level and flow rate of many stations along the mainstream and tributaries had reached their record high. The record-breaking peak flow rate at many stations along the mainstream and tributaries in the middle reaches of the Yangtze River indicated intense precipitation in the area. The heavy rainfall disaster in the Yangtze River Basin could be driven by these reasons. First, the cold air in North China was extraordinary active in 1849, which made it difficult for the subtropical high pressure to move northward. Second, the rain belt stagnated in the Yangtze River Basin for a long time, and the Meiyu period reached 42 days, 62% longer than normal years. Third, the onset of a southwest monsoon was earlier and more active, which provided abundant moisture to the Yangtze River Basin. The great flood disaster was caused by heavy precipitation at the middle reaches, which made it quite different from the other three great floods in the Yangtze River in the 20th century. At present, the large water conservancy projects in the Yangtze River are mainly designed for flood problems caused by rainstorms in the upper reaches of the Yangtze River. The middle reaches of the Yangtze River, however, are facing the weakening of flood diversion capacity, caused by social and economic development. Therefore, future flood prevention measures in the Yangtze River should pay great attention to the threat of this flood pattern.

Effects of convection over the Tibetan Plateau on rainstorms downstream of the Yangtze River Basin

2019 ◽  
Vol 219 ◽  
pp. 24-35 ◽  
Author(s):  
Yang Zhao ◽  
Xiangde Xu ◽  
Liping Liu ◽  
Rong Zhang ◽  
Hongxiong Xu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
River Basin ◽  
Yangtze River ◽  
Yangtze River Basin ◽  
The Tibetan Plateau ◽  
The Yangtze River ◽  
The Yangtze River Basin
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