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

Author:

Zhong Ziqian1ORCID,He Bin1ORCID,Wang Ying-Ping2ORCID,Chen Hans W.3ORCID,Chen Deliang4ORCID,Fu Yongshuo H.5ORCID,Chen Yaning6,Guo Lanlan7ORCID,Deng Ying8ORCID,Huang Ling9ORCID,Yuan Wenping10,Hao Xingmin6ORCID,Tang Rui1,Liu Huiming11,Sun Liying12ORCID,Xie Xiaoming1ORCID,Zhang Yafeng1

Affiliation:

1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, 100875 Beijing, China.

2. CSIRO Environment, Private Bag 1, Aspendale, Victoria, Australia.

3. Department of Space, Earth and Environment, Division of Geoscience and Remote Sensing, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.

4. Regional Climate Group, Department of Earth Sciences, University of Gothenburg, S-40530 Gothenburg, Sweden.

5. College of Water Sciences, Beijing Normal University, 100875 Beijing, China.

6. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011 Urumqi, China.

7. School of Geography, Beijing Normal University, 100875 Beijing, China.

8. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, No. 20 Nanxincun, Xiangshan, 100093 Beijing, China.

9. College of Urban and Environmental Sciences, Peking University, 100871 Beijing, China.

10. School of Atmospheric Sciences, Sun Yat-Sen University, 510275 Guangzhou, China.

11. Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, 100094 Beijing, China.

12. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101 Beijing, China.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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