China is suffering from fewer but more severe drought to flood abrupt alternation events
Drought to flood abrupt alternation (DFAA) events, as a special category of compound extreme events that suddenly shift from drought to flood conditions, have significantly greater impacts than individual drought or flood events. In this paper, we have utilized a multifactorial drought index and flo...
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Elsevier
2024-12-01
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| Series: | Weather and Climate Extremes |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212094724000987 |
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| author | Jun Su Yihui Ding Yanju Liu Jing Wang Yingxian Zhang |
| author_facet | Jun Su Yihui Ding Yanju Liu Jing Wang Yingxian Zhang |
| author_sort | Jun Su |
| collection | DOAJ |
| description | Drought to flood abrupt alternation (DFAA) events, as a special category of compound extreme events that suddenly shift from drought to flood conditions, have significantly greater impacts than individual drought or flood events. In this paper, we have utilized a multifactorial drought index and flood index to identify daily DFAA events occurring in mainland China and in major impact areas during the period 1961–2022. Based on drought and flood index, we have used entropy weighting method to measure the intensity of DFAA events. Our findings indicate that China's DFAA events primarily occur in the hotspots of Huang-Huai-Hai River Basin, the middle and lower Yangtze River Basin, the southeastern coastal area, and the southwestern part of the country. The most frequent and intense DFAA events occur from June to September, with varying subseasonal patterns in the frequency and intensity of events in each hotspot. The frequency of DFAA events in mainland China shows a significant decreasing trend declining at a rate of 0.25 per year in year-round. While DFAA events occurring in the warm season tend to decrease more significantly compared to the year-round at a rate of 0.26 per year. However, the intensity of DFAA events is increasing with a rate of 0.1 per decade in both the year-round and warm season. The evolution of DFAA events and their direct causes varies non-uniformly across regions and months. Subseasonally, frequency and intensity trends diverged monthly across regions, notably with the Huang-Huai-Hai Basin and southeast coast experiencing a July decline in frequency but a surge in intensity. Our research deepens the understanding of changes in DFAA events and provides practical reference for preventing and mitigating drought-to-flood disasters in mainland China. |
| format | Article |
| id | doaj-art-c4d3c7e1080a42bea10c9e46477a6f30 |
| institution | Kabale University |
| issn | 2212-0947 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Weather and Climate Extremes |
| spelling | doaj-art-c4d3c7e1080a42bea10c9e46477a6f302024-12-08T06:09:51ZengElsevierWeather and Climate Extremes2212-09472024-12-0146100737China is suffering from fewer but more severe drought to flood abrupt alternation eventsJun Su0Yihui Ding1Yanju Liu2Jing Wang3Yingxian Zhang4Chinese Academy of Meteorological Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; National Climate Center, China Meteorological Administration, Beijing, ChinaNational Climate Center, China Meteorological Administration, Beijing, China; Corresponding author.National Climate Center, China Meteorological Administration, Beijing, China; Corresponding author.Tianjin Institute of Meteorological Science, Tianjin, ChinaNational Climate Center, China Meteorological Administration, Beijing, ChinaDrought to flood abrupt alternation (DFAA) events, as a special category of compound extreme events that suddenly shift from drought to flood conditions, have significantly greater impacts than individual drought or flood events. In this paper, we have utilized a multifactorial drought index and flood index to identify daily DFAA events occurring in mainland China and in major impact areas during the period 1961–2022. Based on drought and flood index, we have used entropy weighting method to measure the intensity of DFAA events. Our findings indicate that China's DFAA events primarily occur in the hotspots of Huang-Huai-Hai River Basin, the middle and lower Yangtze River Basin, the southeastern coastal area, and the southwestern part of the country. The most frequent and intense DFAA events occur from June to September, with varying subseasonal patterns in the frequency and intensity of events in each hotspot. The frequency of DFAA events in mainland China shows a significant decreasing trend declining at a rate of 0.25 per year in year-round. While DFAA events occurring in the warm season tend to decrease more significantly compared to the year-round at a rate of 0.26 per year. However, the intensity of DFAA events is increasing with a rate of 0.1 per decade in both the year-round and warm season. The evolution of DFAA events and their direct causes varies non-uniformly across regions and months. Subseasonally, frequency and intensity trends diverged monthly across regions, notably with the Huang-Huai-Hai Basin and southeast coast experiencing a July decline in frequency but a surge in intensity. Our research deepens the understanding of changes in DFAA events and provides practical reference for preventing and mitigating drought-to-flood disasters in mainland China.http://www.sciencedirect.com/science/article/pii/S2212094724000987Drought to flood abrupt alternationMultiscaleChinaDaily data |
| spellingShingle | Jun Su Yihui Ding Yanju Liu Jing Wang Yingxian Zhang China is suffering from fewer but more severe drought to flood abrupt alternation events Weather and Climate Extremes Drought to flood abrupt alternation Multiscale China Daily data |
| title | China is suffering from fewer but more severe drought to flood abrupt alternation events |
| title_full | China is suffering from fewer but more severe drought to flood abrupt alternation events |
| title_fullStr | China is suffering from fewer but more severe drought to flood abrupt alternation events |
| title_full_unstemmed | China is suffering from fewer but more severe drought to flood abrupt alternation events |
| title_short | China is suffering from fewer but more severe drought to flood abrupt alternation events |
| title_sort | china is suffering from fewer but more severe drought to flood abrupt alternation events |
| topic | Drought to flood abrupt alternation Multiscale China Daily data |
| url | http://www.sciencedirect.com/science/article/pii/S2212094724000987 |
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