气候变化领域集成服务门户(CCPortal): Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate

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DOI	10.1088/1748-9326/abacf7
	Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate
	Yang C.-E.; Hoffman F.M.; Ricciuto D.M.; Tilmes S.; Xia L.; MacMartin D.G.; Kravitz B.; Richter J.H.; Mills M.; Fu J.S.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Geoengineering by injecting sulfur dioxide (SO2) into the lower stratosphere has been suggested to reduce anthropogenically induced warming. While impacts of such geoengineering on climate have been investigated in recent decades, few modeling studies have considered biogeochemical feedbacks resulting from such intervention. This study comprehensively characterizes responses and feedbacks of terrestrial ecosystems, from an ensemble of coupled high-resolution Earth system model climate change simulations, under the highest standard greenhouse gas scenario with an extreme geoengineering mitigation strategy. Under this strategy, temperature increases beyond 2020 levels due to elevated anthropogenic carbon dioxide (CO2) were completely offset by the SO2 injection. Carbon cycle feedbacks can alter the trajectory of atmospheric CO2 levels by storing or releasing additional carbon on land and in the ocean, thus moderating or amplifying climate change. We assess terrestrial biogeochemical feedbacks to climate in response to geoengineering, using model output from the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) project. Results indicate terrestrial ecosystems become a stronger carbon sink globally because of lower ecosystem respiration and diminished disturbance effects under geoengineering. An additional 79 Pg C would be stored on land by the end of the twenty-first century, yielding as much as a 4% reduction in atmospheric CO2 mole fraction without marine biogeochemical feedbacks, compared to the high greenhouse gas scenario without geoengineering. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	Carbon cycle; Geoengineering; Terrestrial biogeochemical feedbacks
语种	英语
scopus关键词	Biogeochemistry; Carbon dioxide; Climate models; Earth (planet); Ecosystems; Greenhouse gases; Sulfur dioxide; Anthropogenic carbon dioxide; Climate change simulations; Disturbance effects; Ecosystem respiration; Mitigation strategy; Stratospheric aerosols; Temperature increase; Terrestrial ecosystems; Climate change; assessment method; atmosphere-ocean coupling; carbon dioxide; carbon sink; climate change; climate modeling; sulfur dioxide; terrestrial ecosystem
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153665
作者单位	Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, United States; Climate Change Science Institute, Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States; Climate Change Science Institute, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States; Atmospheric Chemistry, Observations, and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO 80307, United States; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80307, United States; Department of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, United States; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, United States; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405, United States; Atmospheric Sciences and Global Change Division, Pac...
推荐引用方式 GB/T 7714	Yang C.-E.,Hoffman F.M.,Ricciuto D.M.,et al. Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate[J],2020,15(10).
APA	Yang C.-E..,Hoffman F.M..,Ricciuto D.M..,Tilmes S..,Xia L..,...&Fu J.S..(2020).Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate.Environmental Research Letters,15(10).
MLA	Yang C.-E.,et al."Assessing terrestrial biogeochemical feedbacks in a strategically geoengineered climate".Environmental Research Letters 15.10(2020).