Increasing Optimum Temperature of Vegetation Activity Over the Past Four Decades
文献类型：期刊论文
| 作者 | Wang, Yiheng5,6; Sarmah, Sangeeta6; Singha, Mrinal4; Chen, Weinan5,6; Ge, Yong3; Liang, Liyin L.2; Goswami, Santonu1; Niu, Shuli5,6 |
| 刊名 | EARTHS FUTURE
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 12期号:10页码:e2024EF004489 |
| 关键词 | temperature response thermal acclimation vegetation activity optimum temperature NDVI |
| DOI | 10.1029/2024EF004489 |
| 产权排序 | 1 |
| 英文摘要 | Over the past four decades, global temperatures have increased more rapidly than before, potentially reducing vegetation activity if temperatures exceed the optimum temperature (Topt). However, plants have the capacity to acclimate to rising temperatures by adjusting Topt, thereby maintaining or even enhancing photosynthesis and carbon uptake. Despite this, it remains unclear how Topt of vegetation activity changes over time and to what extent global vegetation can acclimate to current temperature changes. In this study, we evaluated the temporal trends of Topt of vegetation activity and the thermal acclimation magnitudes globally using three remote-sensed vegetation indices and eddy-covariance observations of gross primary productivity from 1982 to 2020. We found that the global Topt of vegetation activity has increased at an average rate of 0.63 degrees C per decade over the past four decades. The increase in Topt closely tracked the rise in annual maximum daily mean temperature (Tmax), indicating that thermal acclimation has occurred widely across the globe. Globally, we found an average thermal acclimation magnitude of 0.38 degrees C per 1 degrees C increase in Tmax. Notably, polar and continental regions exhibited the highest thermal acclimation magnitudes, while arid areas showed the lowest. Additionally, the thermal acclimation magnitude was positively affected by interannual temperature variability and negatively affected by soil moisture and vapor pressure deficits. Our findings indicate that terrestrial ecosystems have acclimated to current climate warming trends with varying degrees, suggesting a greater potential for land carbon uptake. Moreover, these results highlight the necessity for earth system models to integrate the thermal acclimation of Topt to better forecast the global carbon cycle. Global warming affects vegetation growth, and plants may acclimate to temperature changes to enhance their growth and activity. However, how effectively global vegetation can adjust to temperature changes is unclear. To examine this, we analyzed satellite and ground data from 1982 to 2020 to determine changes in the optimum temperature of vegetation activity. We found that global vegetation has acclimated to rising temperatures by increasing the optimum temperatures. Polar and continental vegetation have undergone the greatest acclimation. In addition, ecosystems with humid climates and higher temperature variability have a greater capacity to acclimate to rising temperatures. These findings have important implications for better predicting how warming will affect the global carbon cycle. The optimum temperature (Topt) of global vegetation activity has increased rapidly, by 0.63 per decade over 1982-2020 The increase in Topt closely tracked the increase in air temperature, revealing widespread thermal acclimation across global vegetation Continental and polar ecosystems showed the greatest capacity for acclimation |
| WOS关键词 | THERMAL-ACCLIMATION ; NET PHOTOSYNTHESIS ; CARBON-DIOXIDE ; RESPONSES ; TREE ; CO2 ; RESPIRATION ; ECOSYSTEM ; LEAF ; TUNDRA |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001324920600001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/208248]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Azim Premji Univ, Ctr Climate Change & Sustainabil, Bangalore, Karnataka, India 2.Liang, Liyin L.] Manaaki Whenua Landcare Res, Palmerston North, New Zealand 3.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.Indian Inst Human Settlements IIHS, Bangalore, Karnataka, India 5.Univ Chinese Acad Sci, Sch Resources & Environm, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Simulat, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yiheng,Sarmah, Sangeeta,Singha, Mrinal,et al. Increasing Optimum Temperature of Vegetation Activity Over the Past Four Decades[J]. EARTHS FUTURE,2024,12(10):e2024EF004489. |
| APA | Wang, Yiheng.,Sarmah, Sangeeta.,Singha, Mrinal.,Chen, Weinan.,Ge, Yong.,...&Niu, Shuli.(2024).Increasing Optimum Temperature of Vegetation Activity Over the Past Four Decades.EARTHS FUTURE,12(10),e2024EF004489. |
| MLA | Wang, Yiheng,et al."Increasing Optimum Temperature of Vegetation Activity Over the Past Four Decades".EARTHS FUTURE 12.10(2024):e2024EF004489. |
入库方式： OAI收割
来源：地理科学与资源研究所
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