Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China
During 19–21 July 2021, Henan located in central-eastern China experienced torrential rainfall that caused devastating floods and claimed more than 300 casualties. It remains unclear whether and to what extent this extreme precipitation event is contributed by Typhoon In-Fa (TIF). Here we quantify t...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/aca2c4 |
| _version_ | 1827869699909615616 |
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| author | Yang Yu Tao Gao Lian Xie Rong-Hua Zhang Wei Zhang Hongxiong Xu Fuqiang Cao Bin Chen |
| author_facet | Yang Yu Tao Gao Lian Xie Rong-Hua Zhang Wei Zhang Hongxiong Xu Fuqiang Cao Bin Chen |
| author_sort | Yang Yu |
| collection | DOAJ |
| description | During 19–21 July 2021, Henan located in central-eastern China experienced torrential rainfall that caused devastating floods and claimed more than 300 casualties. It remains unclear whether and to what extent this extreme precipitation event is contributed by Typhoon In-Fa (TIF). Here we quantify the contribution of TIF to this record-breaking ‘21/7’ rainfall using an air–sea coupled model with ensemble simulations. The modeling results show that the northwestward moisture transport along the confluence front of TIF and the western Pacific subtropical high (WPSH) contribute mostly to the precipitation extremes across Henan. A sensitivity experiment that removes the TIF effect confirms TIF’s role in shaping extreme rainfall. Specifically, without TIF, WPSH shifts the moisture transport northeastward and causes a heavy rainband over the Korean Peninsula, with much less precipitation over Henan. The water vapor budget over Henan suggests that the TIF-induced moisture advection is nine times greater than the local moisture supply and is effectively converted into clouds therein to reinforce precipitation extremes. The contribution of TIF to the ‘21/7’ Henan torrential rainfall on average could be as large as 42% by comparing the differences between simulated results with and without TIF’s effects. |
| first_indexed | 2024-03-12T15:48:47Z |
| format | Article |
| id | doaj.art-4fe030f365364595a0882c9297fdee82 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:48:47Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-4fe030f365364595a0882c9297fdee822023-08-09T15:18:48ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-01171212400310.1088/1748-9326/aca2c4Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern ChinaYang Yu0https://orcid.org/0000-0002-5527-1540Tao Gao1https://orcid.org/0000-0002-1201-1458Lian Xie2Rong-Hua Zhang3Wei Zhang4https://orcid.org/0000-0001-8134-6908Hongxiong Xu5Fuqiang Cao6Bin Chen7Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, and Center for Ocean Mega-Science, Chinese Academy of Sciences , Qingdao 266071, People’s Republic of China; Laoshan Laboratory , Qingdao 266237, People’s Republic of ChinaCollege of Urban Construction, Heze University , Heze, People’s Republic of China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences , Beijing 100029, People’s Republic of ChinaDepartment of Marine, Earth and Atmospheric Sciences, North Carolina State University , Raleigh, NC, United States of AmericaKey Laboratory of Ocean Circulation and Waves, Institute of Oceanology, and Center for Ocean Mega-Science, Chinese Academy of Sciences , Qingdao 266071, People’s Republic of China; Laoshan Laboratory , Qingdao 266237, People’s Republic of China; School of Marine Sciences, Nanjing University of Information Science and Technology , Nanjing 210044, People’s Republic of ChinaDepartment of Plants, Soils and Climate, Utah State University , Logan, UT, United States of AmericaState Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, China Meteorological Administration , Beijing 100081, People’s Republic of ChinaChina School of Geosciences, Shanxi Normal University , Linfen 041000, People’s Republic of ChinaState Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, China Meteorological Administration , Beijing 100081, People’s Republic of ChinaDuring 19–21 July 2021, Henan located in central-eastern China experienced torrential rainfall that caused devastating floods and claimed more than 300 casualties. It remains unclear whether and to what extent this extreme precipitation event is contributed by Typhoon In-Fa (TIF). Here we quantify the contribution of TIF to this record-breaking ‘21/7’ rainfall using an air–sea coupled model with ensemble simulations. The modeling results show that the northwestward moisture transport along the confluence front of TIF and the western Pacific subtropical high (WPSH) contribute mostly to the precipitation extremes across Henan. A sensitivity experiment that removes the TIF effect confirms TIF’s role in shaping extreme rainfall. Specifically, without TIF, WPSH shifts the moisture transport northeastward and causes a heavy rainband over the Korean Peninsula, with much less precipitation over Henan. The water vapor budget over Henan suggests that the TIF-induced moisture advection is nine times greater than the local moisture supply and is effectively converted into clouds therein to reinforce precipitation extremes. The contribution of TIF to the ‘21/7’ Henan torrential rainfall on average could be as large as 42% by comparing the differences between simulated results with and without TIF’s effects.https://doi.org/10.1088/1748-9326/aca2c4tropical cyclone‘21/7’ extreme rainfallTyphoon In-Fawater vapor budget |
| spellingShingle | Yang Yu Tao Gao Lian Xie Rong-Hua Zhang Wei Zhang Hongxiong Xu Fuqiang Cao Bin Chen Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China Environmental Research Letters tropical cyclone ‘21/7’ extreme rainfall Typhoon In-Fa water vapor budget |
| title | Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China |
| title_full | Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China |
| title_fullStr | Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China |
| title_full_unstemmed | Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China |
| title_short | Tropical cyclone over the western Pacific triggers the record-breaking ‘21/7’ extreme rainfall in Henan, central-eastern China |
| title_sort | tropical cyclone over the western pacific triggers the record breaking 21 7 extreme rainfall in henan central eastern china |
| topic | tropical cyclone ‘21/7’ extreme rainfall Typhoon In-Fa water vapor budget |
| url | https://doi.org/10.1088/1748-9326/aca2c4 |
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