Increased drought effects on the phenology of autumn leaf senescence

Chaoyang Wu (), Jie Peng (), Philippe Ciais, Josep Peñuelas, Huanjiong Wang, Santiago Beguería, T. Andrew Black, Rachhpal S. Jassal, Xiaoyang Zhang, Wenping Yuan, Eryuan Liang, Xiaoyue Wang, Hao Hua, Ronggao Liu, Weimin Ju, Yongshuo H. Fu and Quansheng Ge ()
Additional contact information
Chaoyang Wu: Chinese Academy of Sciences
Jie Peng: Chinese Academy of Sciences
Philippe Ciais: Laboratoire des Sciences du Climat et de l’Environnement, IPSL-LSCE CEA CNRS UVSQ
Josep Peñuelas: CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra
Huanjiong Wang: Chinese Academy of Sciences
Santiago Beguería: Consejo Superior de Investigaciones Científicas
T. Andrew Black: University of British Columbia
Rachhpal S. Jassal: University of British Columbia
Xiaoyang Zhang: South Dakota State University
Wenping Yuan: Sun Yat-Sen University
Eryuan Liang: CAS Center for Excellence in Tibetan Plateau Earth Sciences
Xiaoyue Wang: Chinese Academy of Sciences
Hao Hua: Chinese Academy of Sciences
Ronggao Liu: Institute of Geographic Sciences and Natural Resources Research, CAS
Weimin Ju: Nanjing University
Yongshuo H. Fu: Beijing Normal University
Quansheng Ge: Chinese Academy of Sciences

Nature Climate Change, 2022, vol. 12, issue 10, 943-949

Abstract: Abstract Global warming delays the autumn date of foliar senescence (DFS) in recent decades, with positive implications for growing season length and therefore global carbon storage. However, warming-associated drought, leading to water limitation, may conversely stimulate earlier DFS. Using ground observations since 1940s and 34 years of satellite greenness data (1982‒2015) over the Northern Hemisphere (>30° N), we show the increased impact of drought on DFS. Earlier DFS is linked to decreased precipitation under warming and weaker drought resistance associated with various plant functional traits. For example, isohydric plants with strict regulation of water status may drop leaves fast during droughts. We derive an improved set of phenology models based on this influence and project earlier DFS by the end of the century, particularly at high latitudes (>50° N). Our results limit uncertainties in the later end of plant growth with warming, aiding estimation of carbon uptake of terrestrial ecosystems.

Date: 2022
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DOI: 10.1038/s41558-022-01464-9

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