Increasing terrestrial ecosystem carbon release in response to autumn cooling and warming

Rui Tang, Bin He (), Hans W. Chen, Deliang Chen, Yaning Chen (), Yongshuo H. Fu, Wenping Yuan, Baofu Li, Zhi Li, Lanlan Guo, Xingming Hao, Liying Sun, Huiming Liu, Cheng Sun and Yang Yang
Additional contact information
Rui Tang: Beijing Normal University
Bin He: Beijing Normal University
Hans W. Chen: Lund University
Deliang Chen: University of Gothenburg
Yaning Chen: Chinese Academy of Sciences
Yongshuo H. Fu: Beijing Normal University
Wenping Yuan: Sun Yat‐Sen University
Baofu Li: Qufu Normal University
Zhi Li: Chinese Academy of Sciences
Lanlan Guo: Beijing Normal University
Xingming Hao: Chinese Academy of Sciences
Liying Sun: Chinese Academy of Sciences
Huiming Liu: Ministry of Ecology and Environment Center for Satellite application on Ecology and Environment
Cheng Sun: Beijing Normal University
Yang Yang: Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai

Nature Climate Change, 2022, vol. 12, issue 4, 380-385

Abstract: Abstract Part of the Northern Hemisphere has experienced widespread autumn cooling during the most recent decades despite overall warming, but how this contrasting temperature change has influenced the ecosystem carbon exchange remains unclear. Here, we show that autumn cooling has occurred over about half of the area north of 25° N since 2004, producing a weak cooling trend over the period 2004–2018. Multiple lines of evidence suggest an increasing net CO2 release in autumn during 2004–2018. In cooling areas, the increasing autumn CO2 release is due to the larger decrease of gross primary productivity (GPP) growth than total ecosystem respiration (TER) growth suppressed by cooling. In the warming areas, TER increased more than GPP because the warming and wetting conditions are more favourable for TER growth than GPP increase. Despite the opposite temperature trends, there has been a systematic increase in ecosystem carbon release across the Northern Hemisphere middle and high latitudes.

Date: 2022
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DOI: 10.1038/s41558-022-01304-w

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