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The fate of carbon in a mature forest under carbon dioxide enrichment 期刊论文
NATURE, 2020, 580 (7802) : 227-+
作者:  Sun, P. Z.;  Yang, Q.;  Kuang, W. J.;  Stebunov, Y. V.;  Xiong, W. Q.;  Yu, J.;  Nair, R. R.;  Katsnelson, M. I.;  Yuan, S. J.;  Grigorieva, I. V.;  Lozada-Hidalgo, M.;  Wang, F. C.;  Geim, A. K.
收藏  |  浏览/下载:90/0  |  提交时间:2020/05/13

Carbon dioxide enrichment of a mature forest resulted in the emission of the excess carbon back into the atmosphere via enhanced ecosystem respiration, suggesting that mature forests may be limited in their capacity to mitigate climate change.


Atmospheric carbon dioxide enrichment (eCO(2)) can enhance plant carbon uptake and growth(1-5), thereby providing an important negative feedback to climate change by slowing the rate of increase of the atmospheric CO2 concentration(6). Although evidence gathered from young aggrading forests has generally indicated a strong CO2 fertilization effect on biomass growth(3-5), it is unclear whether mature forests respond to eCO(2) in a similar way. In mature trees and forest stands(7-10), photosynthetic uptake has been found to increase under eCO(2) without any apparent accompanying growth response, leaving the fate of additional carbon fixed under eCO(2) unclear(4,5,7-11). Here using data from the first ecosystem-scale Free-Air CO2 Enrichment (FACE) experiment in a mature forest, we constructed a comprehensive ecosystem carbon budget to track the fate of carbon as the forest responded to four years of eCO(2) exposure. We show that, although the eCO(2) treatment of +150 parts per million (+38 per cent) above ambient levels induced a 12 per cent (+247 grams of carbon per square metre per year) increase in carbon uptake through gross primary production, this additional carbon uptake did not lead to increased carbon sequestration at the ecosystem level. Instead, the majority of the extra carbon was emitted back into the atmosphere via several respiratory fluxes, with increased soil respiration alone accounting for half of the total uptake surplus. Our results call into question the predominant thinking that the capacity of forests to act as carbon sinks will be generally enhanced under eCO(2), and challenge the efficacy of climate mitigation strategies that rely on ubiquitous CO2 fertilization as a driver of increased carbon sinks in global forests.


  
Quantifying the probability distribution function of the transient climate response to cumulative CO2 emissions 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (3)
作者:  Spafford, Lynsay;  MacDougall, Andrew H.
收藏  |  浏览/下载:21/0  |  提交时间:2020/07/02
transient climate response to cumulative CO2 emissions  carbon budgets  climate sensitivity  land-borne fraction of carbon  carbon-climate feedback  
Response of maize biomass and soil water fluxes on elevated CO2 and drought-From field experiments to process-based simulations 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (9) : 2947-2957
作者:  Kellner, Juliane;  Houska, Tobias;  Manderscheid, Remy;  Weigel, Hans-Joachim;  Breuer, Lutz;  Kraft, Philipp
收藏  |  浏览/下载:34/0  |  提交时间:2019/11/27
CO2 response  coupled hydrological-plant growth model  evaporation  free-air carbon dioxide enrichment  transpiration  Zea mays  
FACE facts hold for multiple generations; Evidence from natural CO2 springs 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (1) : 1-11
作者:  Saban, Jasmine M.;  Chapman, Mark A.;  Taylor, Gail
收藏  |  浏览/下载:23/0  |  提交时间:2019/04/09
atmospheric CO2  climate change  meta-analysis  natural CO2 spring  plant adaptation  plant response  plasticity  
Non-uniform seasonal warming regulates vegetation greening and atmospheric CO2 amplification over northern lands 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (12)
作者:  Li, Zhao;  Xia, Jianyang;  Ahlstrom, Anders;  Rinke, Annette;  Koven, Charles;  Hayes, Daniel J.;  Ji, Duoying;  Zhang, Geli;  Krinner, Gerhard;  Chen, Guangsheng;  Cheng, Wanying;  Dong, Jinwei;  Liang, Junyi;  Moore, John C.;  Jiang, Lifen;  Yan, Liming;  Ciais, Philippe;  Peng, Shushi;  Wang, Ying-Ping;  Xiao, Xiangming;  Shi, Zheng;  McGuire, A. David;  Luo, Yiqi
收藏  |  浏览/下载:29/0  |  提交时间:2019/04/09
slowed down  asymmetric response  non-uniform seasonal warming  atmospheric CO2 amplitude  
Comparing optimal and empirical stomatal conductance models for application in Earth system models 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (12) : 5708-5723
作者:  Franks, Peter J.;  Bonan, Gordon B.;  Berry, Joseph A.;  Lombardozzi, Danica L.;  Holbrook, N. Michele;  Herold, Nicholas;  Oleson, Keith W.
收藏  |  浏览/下载:21/0  |  提交时间:2019/04/09
Ball-Berry model  canopy conductance  CLM  forest CO2 response  land surface model  scaling stomatal conductance  stomatal conductance model  
Detecting drought impact on terrestrial biosphere carbon fluxes over contiguous US with satellite observations 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (9)
作者:  Liu, Junjie;  Bowman, Kevin;  Parazoo, Nicholas C.;  Bloom, A. Anthony;  Wunch, Debra;  Jiang, Zhe;  Gurney, Kevin R.;  Schimel, Dave
收藏  |  浏览/下载:26/0  |  提交时间:2019/04/09
2011 and 2012 North American drought  terrestrial biosphere carbon response  GOSAT  column CO2  solar induced chlorophyll fluorescence  
Explaining the doubling of N2O emissions under elevated CO2 in the Giessen FACE via in-field N-15 tracing 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (9) : 3897-3910
作者:  Moser, Gerald;  Gorenflo, Andre;  Brenzinger, Kristof;  Keidel, Lisa;  Braker, Gesche;  Marhan, Sven;  Clough, Tim J.;  Mueller, Christoph
收藏  |  浏览/下载:25/0  |  提交时间:2019/04/09
climate change  elevated CO2  free air CO2 enrichment  grassland  long-term response  N transformation  N2O emission  positive climate change feedback  
Counterintuitive effects of global warming-induced wind patterns on primary production in the Northern Humboldt Current System 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (7) : 3187-3198
作者:  Mogollon, Rodrigo;  Calil, Paulo H. R.
收藏  |  浏览/下载:10/0  |  提交时间:2019/04/09
Bakun'  s hypothesis  build up of atmospheric CO2  eddy-driven effects  global warming-induced wind intensification  latitudinal variability of primary production  Northern Humboldt Current System  response of biological production  
Carbon Dioxide Physiological Forcing Dominates Projected Eastern Amazonian Drying 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (6) : 2815-2825
作者:  Richardson, T. B.;  Forster, P. M.;  Andrews, T.;  Boucher, O.;  Faluvegi, G.;  Flaeschner, D.;  Kasoar, M.;  Kirkevag, A.;  Lamarque, J. -F.;  Myhre, G.;  Olivie, D.;  Samset, B. H.;  Shawki, D.;  Shindell, D.;  Takemura, T.;  Voulgarakis, A.
收藏  |  浏览/下载:16/0  |  提交时间:2019/04/09
precipitation  Amazon  physiological forcing  fast response  CO2 forcing  stomatal response