Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event
Abstract Compound drought‐heatwave (CDHW) events threaten ecosystem productivity and are often characterized by low soil moisture (SM) and high vapor pressure deficit (VPD). However, the relative roles of SM and VPD in constraining forest productivity during CDHWs remain controversial. In the summer...
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| Format: | Article |
| Language: | English |
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Wiley
2023-09-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL104539 |
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| author | Dayang Zhao Zhaoying Zhang Yongguang Zhang |
| author_facet | Dayang Zhao Zhaoying Zhang Yongguang Zhang |
| author_sort | Dayang Zhao |
| collection | DOAJ |
| description | Abstract Compound drought‐heatwave (CDHW) events threaten ecosystem productivity and are often characterized by low soil moisture (SM) and high vapor pressure deficit (VPD). However, the relative roles of SM and VPD in constraining forest productivity during CDHWs remain controversial. In the summer of 2022, China experienced a record‐breaking CDHW event (DH2022). Here, we applied satellite remote‐sensing data and meteorological data, and machine‐learning techniques to quantify the individual contributions of SM and VPD to forest productivity variations and investigate their interactions during the development of DH2022. The results reveal that SM, rather than VPD, dominates the forest productivity decline during DH2022. We identified a possible critical tipping point of SM below which forest productivity would quickly decline with the decreasing SM. Furthermore, we illuminated the evolution of SM, VPD, evapotranspiration, forest productivity, and their interactions throughout DH2022. Our findings broaden the understanding of forest response to extreme CDHWs at the ecosystem scale. |
| format | Article |
| id | doaj-art-1c56f632648a4486bf5fb301dde5bec4 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-1c56f632648a4486bf5fb301dde5bec42025-08-20T03:02:10ZengWileyGeophysical Research Letters0094-82761944-80072023-09-015017n/an/a10.1029/2023GL104539Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave EventDayang Zhao0Zhaoying Zhang1Yongguang Zhang2Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application International Institute for Earth System Sciences Nanjing University Nanjing ChinaJiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application International Institute for Earth System Sciences Nanjing University Nanjing ChinaJiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application International Institute for Earth System Sciences Nanjing University Nanjing ChinaAbstract Compound drought‐heatwave (CDHW) events threaten ecosystem productivity and are often characterized by low soil moisture (SM) and high vapor pressure deficit (VPD). However, the relative roles of SM and VPD in constraining forest productivity during CDHWs remain controversial. In the summer of 2022, China experienced a record‐breaking CDHW event (DH2022). Here, we applied satellite remote‐sensing data and meteorological data, and machine‐learning techniques to quantify the individual contributions of SM and VPD to forest productivity variations and investigate their interactions during the development of DH2022. The results reveal that SM, rather than VPD, dominates the forest productivity decline during DH2022. We identified a possible critical tipping point of SM below which forest productivity would quickly decline with the decreasing SM. Furthermore, we illuminated the evolution of SM, VPD, evapotranspiration, forest productivity, and their interactions throughout DH2022. Our findings broaden the understanding of forest response to extreme CDHWs at the ecosystem scale.https://doi.org/10.1029/2023GL104539compound drought‐heatwave eventssoil moisturevapor pressure deficitforest productivity |
| spellingShingle | Dayang Zhao Zhaoying Zhang Yongguang Zhang Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event Geophysical Research Letters compound drought‐heatwave events soil moisture vapor pressure deficit forest productivity |
| title | Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event |
| title_full | Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event |
| title_fullStr | Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event |
| title_full_unstemmed | Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event |
| title_short | Soil Moisture Dominates the Forest Productivity Decline During the 2022 China Compound Drought‐Heatwave Event |
| title_sort | soil moisture dominates the forest productivity decline during the 2022 china compound drought heatwave event |
| topic | compound drought‐heatwave events soil moisture vapor pressure deficit forest productivity |
| url | https://doi.org/10.1029/2023GL104539 |
| work_keys_str_mv | AT dayangzhao soilmoisturedominatestheforestproductivitydeclineduringthe2022chinacompounddroughtheatwaveevent AT zhaoyingzhang soilmoisturedominatestheforestproductivitydeclineduringthe2022chinacompounddroughtheatwaveevent AT yongguangzhang soilmoisturedominatestheforestproductivitydeclineduringthe2022chinacompounddroughtheatwaveevent |