Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms
Study region: Altay region in Northwest China. Study focus: The frequency, intensity, and impacts of spring snowmelt flood disasters have changed significantly. However, there is still a limited understanding of snowmelt floods and their causes in Altay. In this study, we focus on the essential char...
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| Language: | English |
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824004919 |
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| author | Dilinuer Tuoliewubieke Weiyi Mao Junqiang Yao Xu Zhang Shujuan Li Ping Chen Liyun Ma Jing Chen |
| author_facet | Dilinuer Tuoliewubieke Weiyi Mao Junqiang Yao Xu Zhang Shujuan Li Ping Chen Liyun Ma Jing Chen |
| author_sort | Dilinuer Tuoliewubieke |
| collection | DOAJ |
| description | Study region: Altay region in Northwest China. Study focus: The frequency, intensity, and impacts of spring snowmelt flood disasters have changed significantly. However, there is still a limited understanding of snowmelt floods and their causes in Altay. In this study, we focus on the essential characteristics of 49 spring snowmelt flood disasters and explore the related atmospheric circulation anomalies and local thermal conditions that contributed to extreme temperature rises, triggering warming-type flood events. New hydrological insights for the region: From 1984–2018, spring warming-type snowmelt floods predominated in Altay. These floods were associated with a deep high-pressure system over northern Central Asia, which intensified and shifted northward leaing to positive geopotential height anomalies. Additionally, southeasterly anomalies at 850 hPa significantly influenced these events. Zonal cross-sections of average air temperature and vertical circulation anomalies exhibit positive and descending motion anomalies, with the 0 °C layer height rises. The thermal conditions in spring show distinct characteristics, including enhanced upward energy flux from the surface, which favors to local warming in both March and April. In May, downward motion due to reduced cloud cover, resulting in an increase in net shortwave radiation flux reaching the surface. These results provide valuable insights for further exploration of the precursor signals associated with snowmelt floods in the Altay. |
| format | Article |
| id | doaj-art-a14c8be565714cd98e2b89268f6c40ea |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-a14c8be565714cd98e2b89268f6c40ea2025-01-22T05:42:11ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102142Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanismsDilinuer Tuoliewubieke0Weiyi Mao1Junqiang Yao2Xu Zhang3Shujuan Li4Ping Chen5Liyun Ma6Jing Chen7Institute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaInstitute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, China; Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi, China; Corresponding author at: Institute of Desert Meteorology, China Meteorological Administration, Urumqi, China.Institute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaUrumqi Meteorological Satellite Ground Station, Urumqi, ChinaInstitute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaInstitute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaInstitute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaInstitute of Desert Meteorology, China Meteorological Administration, Urumqi, China; Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration, Urumqi, China; Field Scientific Experiment Base of Akdala Atmospheric Background, China Meteorological Administration, Akdala, ChinaStudy region: Altay region in Northwest China. Study focus: The frequency, intensity, and impacts of spring snowmelt flood disasters have changed significantly. However, there is still a limited understanding of snowmelt floods and their causes in Altay. In this study, we focus on the essential characteristics of 49 spring snowmelt flood disasters and explore the related atmospheric circulation anomalies and local thermal conditions that contributed to extreme temperature rises, triggering warming-type flood events. New hydrological insights for the region: From 1984–2018, spring warming-type snowmelt floods predominated in Altay. These floods were associated with a deep high-pressure system over northern Central Asia, which intensified and shifted northward leaing to positive geopotential height anomalies. Additionally, southeasterly anomalies at 850 hPa significantly influenced these events. Zonal cross-sections of average air temperature and vertical circulation anomalies exhibit positive and descending motion anomalies, with the 0 °C layer height rises. The thermal conditions in spring show distinct characteristics, including enhanced upward energy flux from the surface, which favors to local warming in both March and April. In May, downward motion due to reduced cloud cover, resulting in an increase in net shortwave radiation flux reaching the surface. These results provide valuable insights for further exploration of the precursor signals associated with snowmelt floods in the Altay.http://www.sciencedirect.com/science/article/pii/S2214581824004919Snowmelt flood disastersTemperature rise processAltay regionSurface heat flux |
| spellingShingle | Dilinuer Tuoliewubieke Weiyi Mao Junqiang Yao Xu Zhang Shujuan Li Ping Chen Liyun Ma Jing Chen Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms Journal of Hydrology: Regional Studies Snowmelt flood disasters Temperature rise process Altay region Surface heat flux |
| title | Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms |
| title_full | Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms |
| title_fullStr | Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms |
| title_full_unstemmed | Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms |
| title_short | Spring snowmelt flood disasters in Altay, Northwest China: Spatio-temporal distribution and mechanisms |
| title_sort | spring snowmelt flood disasters in altay northwest china spatio temporal distribution and mechanisms |
| topic | Snowmelt flood disasters Temperature rise process Altay region Surface heat flux |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824004919 |
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