Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet
Rainstorms and blizzards are common extreme weather events occurring in the eastern Tibet region. Their complex dynamic and thermodynamic mechanisms present challenges for regional meteorological research and forecasting. Based on station observation data and ERA5 atmospheric reanalysis datasets, a...
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| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/16/1/30 |
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| author | Xiaotao Zhao Lunzhu Danzeng Qu Chi Xulin Ma Yuting Tan Luozhu Duodian Ranzhen Danzeng |
| author_facet | Xiaotao Zhao Lunzhu Danzeng Qu Chi Xulin Ma Yuting Tan Luozhu Duodian Ranzhen Danzeng |
| author_sort | Xiaotao Zhao |
| collection | DOAJ |
| description | Rainstorms and blizzards are common extreme weather events occurring in the eastern Tibet region. Their complex dynamic and thermodynamic mechanisms present challenges for regional meteorological research and forecasting. Based on station observation data and ERA5 atmospheric reanalysis datasets, a diagnostic analysis of the heavy rain and snow event in eastern Tibet from 24 to 27 October 2022 was conducted. The results indicate that (1) the influence of the cloud systems surrounding the Bay of Bengal storm “Sitrang” was a significant factor contributing to the occurrence of this heavy rain and snow weather. (2) Sustained stability of the southern branch trough and the western Pacific subtropical high favored the establishment and maintenance of the mid-level jet stream ahead of the storm. Storm “Sitrang” transported warm and moist air to eastern Tibet through the southwest mid-level jet stream, providing favorable moisture, dynamic, and thermal conditions for the heavy rain and snow. (3) Most importantly, symmetrical instability generated by the inclined motion of the storm’s warm and moist air emerged as the decisive mechanism driving the occurrence and development of the heavy rain and snow. |
| format | Article |
| id | doaj-art-7c40e0137fa74afca8c21b5f40c43106 |
| institution | Kabale University |
| issn | 2073-4433 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj-art-7c40e0137fa74afca8c21b5f40c431062025-01-24T13:21:45ZengMDPI AGAtmosphere2073-44332024-12-011613010.3390/atmos16010030Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern TibetXiaotao Zhao0Lunzhu Danzeng1Qu Chi2Xulin Ma3Yuting Tan4Luozhu Duodian5Ranzhen Danzeng6Key Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaMeteorological Observatory of Tibet Autonomous Region, Lhasa 850000, ChinaMeteorological Observatory of Tibet Autonomous Region, Lhasa 850000, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaKey Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaMeteorological Observatory of Tibet Autonomous Region, Lhasa 850000, ChinaMeteorological Observatory of Tibet Autonomous Region, Lhasa 850000, ChinaRainstorms and blizzards are common extreme weather events occurring in the eastern Tibet region. Their complex dynamic and thermodynamic mechanisms present challenges for regional meteorological research and forecasting. Based on station observation data and ERA5 atmospheric reanalysis datasets, a diagnostic analysis of the heavy rain and snow event in eastern Tibet from 24 to 27 October 2022 was conducted. The results indicate that (1) the influence of the cloud systems surrounding the Bay of Bengal storm “Sitrang” was a significant factor contributing to the occurrence of this heavy rain and snow weather. (2) Sustained stability of the southern branch trough and the western Pacific subtropical high favored the establishment and maintenance of the mid-level jet stream ahead of the storm. Storm “Sitrang” transported warm and moist air to eastern Tibet through the southwest mid-level jet stream, providing favorable moisture, dynamic, and thermal conditions for the heavy rain and snow. (3) Most importantly, symmetrical instability generated by the inclined motion of the storm’s warm and moist air emerged as the decisive mechanism driving the occurrence and development of the heavy rain and snow.https://www.mdpi.com/2073-4433/16/1/30cyclonic storm “Sitrang” over the Bay of Bengalheavy rain and snowmoist potential vorticitywater vapor transport |
| spellingShingle | Xiaotao Zhao Lunzhu Danzeng Qu Chi Xulin Ma Yuting Tan Luozhu Duodian Ranzhen Danzeng Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet Atmosphere cyclonic storm “Sitrang” over the Bay of Bengal heavy rain and snow moist potential vorticity water vapor transport |
| title | Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet |
| title_full | Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet |
| title_fullStr | Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet |
| title_full_unstemmed | Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet |
| title_short | Impact of Cyclonic Storm “Sitrang” over the Bay of Bengal on Heavy Rain and Snow in Eastern Tibet |
| title_sort | impact of cyclonic storm sitrang over the bay of bengal on heavy rain and snow in eastern tibet |
| topic | cyclonic storm “Sitrang” over the Bay of Bengal heavy rain and snow moist potential vorticity water vapor transport |
| url | https://www.mdpi.com/2073-4433/16/1/30 |
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