Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts?
Abstract Drought stress, characterized by increased vapor pressure deficit (VPD) and soil water content (SWC) deficit, significantly impacts ecosystem productivity (GPP). Accurately assessing these factors in satellite remote sensing (RS) GPP products is crucial for understanding the large‐scale eco...
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL110785 |
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| author | Xiaorong Wang Zhengfei Guo Kun Zhang Zheng Fu Calvin K. F. Lee Dedi Yang Matteo Detto Yongguang Zhang Jin Wu |
| author_facet | Xiaorong Wang Zhengfei Guo Kun Zhang Zheng Fu Calvin K. F. Lee Dedi Yang Matteo Detto Yongguang Zhang Jin Wu |
| author_sort | Xiaorong Wang |
| collection | DOAJ |
| description | Abstract Drought stress, characterized by increased vapor pressure deficit (VPD) and soil water content (SWC) deficit, significantly impacts ecosystem productivity (GPP). Accurately assessing these factors in satellite remote sensing (RS) GPP products is crucial for understanding the large‐scale ecological consequences of drought. However, the accuracy of RS GPP in capturing the effects of VPD and SWC deficit, compared to EC flux data, remains under‐investigated. Here we evaluated 10 RS GPP products and their mean (RSmean) concerning VPD and SWC deficit across diverse ecosystems along a dryness gradient. Our results revealed that RSmean and individual products generally capture the GPP response direction (VPD: mainly negative, SWC deficit: mixed positive/negative) but consistently misestimate the absolute GPP changes. This discrepancy is ecosystem‐specific and consistent across all RS products, underscoring the need to enhance RS products to better account for ecosystem‐specific VPD effects and non‐linear SWC deficit responses, thereby improving RS GPP accuracy under drought. |
| format | Article |
| id | doaj-art-e67fe7b018d445d796754399c5db3d91 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-e67fe7b018d445d796754399c5db3d912025-08-20T03:44:25ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01528n/an/a10.1029/2024GL110785Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts?Xiaorong Wang0Zhengfei Guo1Kun Zhang2Zheng Fu3Calvin K. F. Lee4Dedi Yang5Matteo Detto6Yongguang Zhang7Jin Wu8School of Biological Sciences Research Area of Ecology and Biodiversity The University of Hong Kong Hong Kong ChinaSchool of Biological Sciences Research Area of Ecology and Biodiversity The University of Hong Kong Hong Kong ChinaSchool of Biological Sciences Research Area of Ecology and Biodiversity The University of Hong Kong Hong Kong ChinaKey Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing ChinaSchool of Biological Sciences Research Area of Ecology and Biodiversity The University of Hong Kong Hong Kong ChinaOak Ridge National Laboratory Environmental Sciences Division and Climate Change Science Institute Oak Ridge TN USADepartment of Ecology and Evolutionary Biology Princeton University Princeton NJ USAJiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application International Institute for Earth System Sciences Nanjing University Nanjing ChinaSchool of Biological Sciences Research Area of Ecology and Biodiversity The University of Hong Kong Hong Kong ChinaAbstract Drought stress, characterized by increased vapor pressure deficit (VPD) and soil water content (SWC) deficit, significantly impacts ecosystem productivity (GPP). Accurately assessing these factors in satellite remote sensing (RS) GPP products is crucial for understanding the large‐scale ecological consequences of drought. However, the accuracy of RS GPP in capturing the effects of VPD and SWC deficit, compared to EC flux data, remains under‐investigated. Here we evaluated 10 RS GPP products and their mean (RSmean) concerning VPD and SWC deficit across diverse ecosystems along a dryness gradient. Our results revealed that RSmean and individual products generally capture the GPP response direction (VPD: mainly negative, SWC deficit: mixed positive/negative) but consistently misestimate the absolute GPP changes. This discrepancy is ecosystem‐specific and consistent across all RS products, underscoring the need to enhance RS products to better account for ecosystem‐specific VPD effects and non‐linear SWC deficit responses, thereby improving RS GPP accuracy under drought.https://doi.org/10.1029/2024GL110785gross primary productivity (GPP)drought stressatmospheric drynesssoil moisture deficitsatellite GPP productseddy flux measurements |
| spellingShingle | Xiaorong Wang Zhengfei Guo Kun Zhang Zheng Fu Calvin K. F. Lee Dedi Yang Matteo Detto Yongguang Zhang Jin Wu Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? Geophysical Research Letters gross primary productivity (GPP) drought stress atmospheric dryness soil moisture deficit satellite GPP products eddy flux measurements |
| title | Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? |
| title_full | Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? |
| title_fullStr | Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? |
| title_full_unstemmed | Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? |
| title_short | Can Large‐Scale Satellite Products Track the Effects of Atmospheric Dryness and Soil Water Deficit on Ecosystem Productivity Under Droughts? |
| title_sort | can large scale satellite products track the effects of atmospheric dryness and soil water deficit on ecosystem productivity under droughts |
| topic | gross primary productivity (GPP) drought stress atmospheric dryness soil moisture deficit satellite GPP products eddy flux measurements |
| url | https://doi.org/10.1029/2024GL110785 |
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