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Disentangling the effects of vapor pressure deficit on northern terrestrial vegetation productivity

Year: 2023
Type: article
Abstract: The impact of atmospheric vapor pressure deficit (VPD) on plant photosynthesis has long been acknowledged, but large interactions with air temperature (T) and soil moisture (SM) still hinder a complete understanding of the influence of VPD on vegetation production across various climate zones. Here, we found a diverging response of productivity to VPD in the Northern Hemisphere by excluding interactive effects of VPD with T and SM. The interactions between VPD and T/SM not only offset the potential positive impact of warming on vegetation productivity but also amplifies the negative effect of soil drying. Notably, for high-latitude ecosystems, there occurs a pronounced shift in vegetation productivity's response to VPD during the growing season when VPD surpasses a threshold of 3.5 to 4.0 hectopascals. These results yield previously unknown insights into the role of VPD in terrestrial ecosystems and enhance our comprehension of the terrestrial carbon cycle's response to global warming.
DOI: 10.1126/sciadv.adf3166
Authors: Ziqian Zhong, Bin He, Ying-Ping Wang, Hans W. Chen, Deliang Chen, Yongshuo H. Fu, Yaning Chen, Lanlan Guo, Ying Deng, Ling Huang, Wenping Yuan, Xingmin Hao, Rui Tang, Huiming Liu, Liying Sun, Xiaoming Xie, Yafeng Zhang
Institutions: Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Commonwealth Scientific and Industrial Research Organisation, CSIRO Environment, Chalmers University of Technology, University of Gothenburg, Chinese Academy of Sciences, Xinjiang Institute of Ecology and Geography, State Key Laboratory of Desert and Oasis Ecology, Institute of Botany, State Key Laboratory of Vegetation and Environmental Change, Peking University, Sun Yat-sen University, Ministry of Ecology and Environment, Satellite Application Center for Ecology and Environment, Institute of Geographic Sciences and Natural Resources Research
Language: English
Open Access status: gold
Estimated APC paid: $4,500
OpenAlex ID: W4385689643
FWCI: 29.45
Cites: 65
Cited by: 264
Related to: 10