气候变化领域集成服务门户(CCPortal): Closing yield gap is crucial to avoid potential surge in global carbon emissions

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DOI	10.1016/j.gloenvcha.2020.102100
	Closing yield gap is crucial to avoid potential surge in global carbon emissions
	Suh S.; Johnson J.A.; Tambjerg L.; Sim S.; Broeckx-Smith S.; Reyes W.; Chaplin-Kramer R.
发表日期	2020
ISSN	0959-3780
卷号	63
英文摘要	Global greenhouse gas (GHG) emissions models generally project a downward trend in CO2 emissions from land use change, assuming significant crop yield improvements. For some crops, however, significant yield gaps persist whilst demand continues to rise. Here we examine the land use change and GHG implications of meeting growing demand for maize. Integrating economic and biophysical models at an unprecedented spatial resolution, we show that CO2 emissions from land conversion may rise sharply if future yield growth follows historical trends. Our results show that ~4.0 Gt of additional CO2 would be emitted from ~23 Mha agricultural expansion from 2015 to 2026, under historical yield improvement trends. If yield gaps are closed expeditiously, however, GHG emissions can be reduced to ~1.1 Gt CO2 during the period. Our results highlight the urgent need to close global yield gaps to minimize agricultural expansion and for continued efforts to constrain agricultural expansion in carbon-rich lands and forests. © 2020 Elsevier Ltd
英文关键词	Agricultural expansion; Greenhouse gas emissions; Intensification; Land-use change; Maize
语种	英语
scopus关键词	biophysics; carbon dioxide; carbon emission; crop yield; greenhouse gas; historical perspective; land use change; maize; trend analysis; Zea mays
来源期刊	Global Environmental Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/142044
作者单位	Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, United States; Department of Applied Economics, University of Minnesota, 1994 Buford Ave., St. Paul, MN 55105, United States; Unilever Safety and Environmental Assurance Centre, Unilever R&D, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom; IERS, 735 State St, Suite 207, Santa Barbara, CA 93101, United States; Natural Capital Project, Woods Institute for the Environment, Stanford University, Stanford, CA 94305, United States
推荐引用方式 GB/T 7714	Suh S.,Johnson J.A.,Tambjerg L.,et al. Closing yield gap is crucial to avoid potential surge in global carbon emissions[J],2020,63.
APA	Suh S..,Johnson J.A..,Tambjerg L..,Sim S..,Broeckx-Smith S..,...&Chaplin-Kramer R..(2020).Closing yield gap is crucial to avoid potential surge in global carbon emissions.Global Environmental Change,63.
MLA	Suh S.,et al."Closing yield gap is crucial to avoid potential surge in global carbon emissions".Global Environmental Change 63(2020).