| Title | Worldwide impacts of atmospheric vapor pressure deficit on the interannual variability of terrestrial carbon sinks |
| Authors | He, Bin Chen, Chen Lin, Shangrong Yuan, Wenping Chen, Hans W. Chen, Deliang Zhang, Yafeng Guo, Lanlan Zhao, Xiang Liu, Xuebang Piao, Shilong Zhong, Ziqian Wang, Rui Tang, Rui |
| Affiliation | Beijing Normal Univ, Coll Global Change & Earth Syst Sci, State Key Lab Earth Surface Proc & Res Ecol, Beijing 100875, Peoples R China Twenty First Century Aerosp Technol Co Ltd, Dept Applicat Res, Beijing 100723, Peoples R China Sun Yat Sen Univ, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Sch Atmospher Sci, Zhuhai 519082, Peoples R China Lund Univ, Dept Phys Geog & Ecosyst Sci, S-22364 Lund, Sweden Univ Gothenburg, Dept Earth Sci, Reg Climate Grp, S-40530 Gothenburg, Sweden Beijing Normal Univ, Sch Geog, Acad Disaster Reduct & Emergency Management, Beijing 100875, Peoples R China Beijing Normal Univ, Fac Geog Sci, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China Peking Univ, Coll Urban & Environm Sci, Sino French Inst Earth Syst Sci, Beijing 100871, Peoples R China |
| Keywords | CO2 GROWTH-RATE SENSITIVITY WATER ARIDITY DEMAND CYCLE |
| Issue Date | 4-Apr-2022 |
| Publisher | NATIONAL SCIENCE REVIEW |
| Abstract | Atmospheric vapor pressure deficit has worldwide impacts on the interannual variability of terrestrial carbon sinks and atmospheric carbon dioxide concentrations. Interannual variability of the terrestrial ecosystem carbon sink is substantially regulated by various environmental variables and highly dominates the interannual variation of atmospheric carbon dioxide (CO2) concentrations. Thus, it is necessary to determine dominating factors affecting the interannual variability of the carbon sink to improve our capability of predicting future terrestrial carbon sinks. Using global datasets derived from machine-learning methods and process-based ecosystem models, this study reveals that the interannual variability of the atmospheric vapor pressure deficit (VPD) was significantly negatively correlated with net ecosystem production (NEP) and substantially impacted the interannual variability of the atmospheric CO2 growth rate (CGR). Further analyses found widespread constraints of VPD interannual variability on terrestrial gross primary production (GPP), causing VPD to impact NEP and CGR. Partial correlation analysis confirms the persistent and widespread impacts of VPD on terrestrial carbon sinks compared to other environmental variables. Current Earth system models underestimate the interannual variability in VPD and its impacts on GPP and NEP. Our results highlight the importance of VPD for terrestrial carbon sinks in assessing ecosystems' responses to future climate conditions. |
| URI | http://hdl.handle.net/20.500.11897/641577 |
| ISSN | 2095-5138 |
| DOI | 10.1093/nsr/nwab150 |
| Indexed | SCI(E) |
| Appears in Collections: | 城市与环境学院 |
