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Recent pause in the growth rate of atmospheric CO2 due to enhanced terrestrial carbon uptake.

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Title: Recent pause in the growth rate of atmospheric CO2 due to enhanced terrestrial carbon uptake.
Authors: Keenan, TF
Prentice, IC
Canadell, JG
Williams, CA
Wang, H
Raupach, M
Collatz, GJ
Item Type: Journal Article
Abstract: Terrestrial ecosystems play a significant role in the global carbon cycle and offset a large fraction of anthropogenic CO2 emissions. The terrestrial carbon sink is increasing, yet the mechanisms responsible for its enhancement, and implications for the growth rate of atmospheric CO2, remain unclear. Here using global carbon budget estimates, ground, atmospheric and satellite observations, and multiple global vegetation models, we report a recent pause in the growth rate of atmospheric CO2, and a decline in the fraction of anthropogenic emissions that remain in the atmosphere, despite increasing anthropogenic emissions. We attribute the observed decline to increases in the terrestrial sink during the past decade, associated with the effects of rising atmospheric CO2 on vegetation and the slowdown in the rate of warming on global respiration. The pause in the atmospheric CO2 growth rate provides further evidence of the roles of CO2 fertilization and warming-induced respiration, and highlights the need to protect both existing carbon stocks and regions, where the sink is growing rapidly.
Issue Date: 8-Nov-2016
Date of Acceptance: 30-Sep-2016
URI: http://hdl.handle.net/10044/1/42896
DOI: 10.1038/ncomms13428
ISSN: 2041-1723
Publisher: Nature Publishing Group: Nature Communications
Start Page: 1
End Page: 10
Journal / Book Title: Nature Communications
Volume: 7
Copyright Statement: © 2016 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Sponsor/Funder: AXA Research Fund
Funder's Grant Number: AXA Chair Programme in Biosphere and Climate Impacts
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Publication Status: Published
Conference Place: England
Article Number: 13428 (2016)
Online Publication Date: 2016-11-08
Appears in Collections:Faculty of Natural Sciences
Grantham Institute for Climate Change