气候变化领域集成服务门户(CCPortal): Asymmetry in the climate–carbon cycle response to positive and negative CO2 emissions

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DOI	10.1038/s41558-021-01061-2
	Asymmetry in the climate–carbon cycle response to positive and negative CO2 emissions
	Zickfeld K.; Azevedo D.; Mathesius S.; Matthews H.D.
发表日期	2021
ISSN	1758-678X
起始页码	613
结束页码	617
卷号	11 期号:7
英文摘要	Negative CO2 emissions are a key mitigation measure in emission scenarios consistent with temperature limits adopted by the Paris Agreement. It is commonly assumed that the climate–carbon cycle response to a negative CO2 emission is equal in magnitude and opposite in sign to the response to an equivalent positive CO2 emission. Here we test the hypothesis that this response is symmetric by forcing an Earth system model with positive and negative CO2 emission pulses of varying magnitude and applied from different climate states. Results indicate that a CO2 emission into the atmosphere is more effective at raising atmospheric CO2 than an equivalent CO2 removal is at lowering it, with the asymmetry increasing with the magnitude of the emission/removal. The findings of this study imply that offsetting positive CO2 emissions with negative emissions of the same magnitude could result in a different climate outcome than avoiding the CO2 emissions. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237290
作者单位	Department of Geography, Simon Fraser University, Burnaby, BC, Canada; Department of Geography, Planning and Environment, Concordia University, Montreal, QC, Canada
推荐引用方式 GB/T 7714	Zickfeld K.,Azevedo D.,Mathesius S.,等. Asymmetry in the climate–carbon cycle response to positive and negative CO2 emissions[J],2021,11(7).
APA	Zickfeld K.,Azevedo D.,Mathesius S.,&Matthews H.D..(2021).Asymmetry in the climate–carbon cycle response to positive and negative CO2 emissions.Nature Climate Change,11(7).
MLA	Zickfeld K.,et al."Asymmetry in the climate–carbon cycle response to positive and negative CO2 emissions".Nature Climate Change 11.7(2021).