Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River
Abstract The upper reaches of the Yangtze River observed record‐breaking droughts, heatwaves, and forest fires in rapid sequence during the 2022 summer, challenging the established mechanistic understanding. We here explained the compound event through a trans‐seasonal vegetation‐land‐atmosphere int...
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| Format: | Article |
| Language: | English |
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Wiley
2025-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL114165 |
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| author | Ning An Yang Chen Zhen Liao Jianying Li |
| author_facet | Ning An Yang Chen Zhen Liao Jianying Li |
| author_sort | Ning An |
| collection | DOAJ |
| description | Abstract The upper reaches of the Yangtze River observed record‐breaking droughts, heatwaves, and forest fires in rapid sequence during the 2022 summer, challenging the established mechanistic understanding. We here explained the compound event through a trans‐seasonal vegetation‐land‐atmosphere interacting perspective. The wetter spring‐sunnier summer pattern resulted in record high loads of vegetation and enhanced transpiration. This led to progressive depletion of soil moisture to a critical threshold that shifted the originally weak response of air temperature into hypersensitive mode. The resulting rapid rise of air temperature amplified atmospheric evaporative demand to an unprecedentedly high level, which in turn exacerbated the drying‐out of soil and vegetation. These favorable weather and fuel factors combined to cause unseasonal forest fires of unprecedented burning intensity. Our results remind of preparedness against drought‐heat‐fire compounding hazards even in humid regions under opportune configurations between ecological and meteorological conditions. |
| format | Article |
| id | doaj-art-8e4a4a0d3a5943668c3abc017052cf50 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8e4a4a0d3a5943668c3abc017052cf502025-08-20T02:30:59ZengWileyGeophysical Research Letters0094-82761944-80072025-05-015210n/an/a10.1029/2024GL114165Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze RiverNing An0Yang Chen1Zhen Liao2Jianying Li3State Key Laboratory of Severe Weather Meteorological Science and Technology Chinese Academy of Meteorological Sciences Beijing People's Republic of ChinaState Key Laboratory of Severe Weather Meteorological Science and Technology Chinese Academy of Meteorological Sciences Beijing People's Republic of ChinaState Key Laboratory of Severe Weather Meteorological Science and Technology Chinese Academy of Meteorological Sciences Beijing People's Republic of ChinaState Key Laboratory of Severe Weather Meteorological Science and Technology Chinese Academy of Meteorological Sciences Beijing People's Republic of ChinaAbstract The upper reaches of the Yangtze River observed record‐breaking droughts, heatwaves, and forest fires in rapid sequence during the 2022 summer, challenging the established mechanistic understanding. We here explained the compound event through a trans‐seasonal vegetation‐land‐atmosphere interacting perspective. The wetter spring‐sunnier summer pattern resulted in record high loads of vegetation and enhanced transpiration. This led to progressive depletion of soil moisture to a critical threshold that shifted the originally weak response of air temperature into hypersensitive mode. The resulting rapid rise of air temperature amplified atmospheric evaporative demand to an unprecedentedly high level, which in turn exacerbated the drying‐out of soil and vegetation. These favorable weather and fuel factors combined to cause unseasonal forest fires of unprecedented burning intensity. Our results remind of preparedness against drought‐heat‐fire compounding hazards even in humid regions under opportune configurations between ecological and meteorological conditions.https://doi.org/10.1029/2024GL114165heatwavesdroughtsland‐atmosphere interactionsnon‐linear granger‐causalitycompound events |
| spellingShingle | Ning An Yang Chen Zhen Liao Jianying Li Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River Geophysical Research Letters heatwaves droughts land‐atmosphere interactions non‐linear granger‐causality compound events |
| title | Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River |
| title_full | Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River |
| title_fullStr | Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River |
| title_full_unstemmed | Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River |
| title_short | Trans‐Seasonal Vegetation‐Land‐Atmosphere Interactions Explained Record‐Breaking Cascading Extremes in the Upper Reaches of the Yangtze River |
| title_sort | trans seasonal vegetation land atmosphere interactions explained record breaking cascading extremes in the upper reaches of the yangtze river |
| topic | heatwaves droughts land‐atmosphere interactions non‐linear granger‐causality compound events |
| url | https://doi.org/10.1029/2024GL114165 |
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