globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1920877117
论文题名:
Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels
作者: Field J.L.; Richard T.L.; Smithwick E.A.H.; Cai H.; Laser M.S.; LeBauer D.S.; Long S.P.; Paustian K.; Qin Z.; Sheehan J.J.; Smith P.; Wang M.Q.; Lynd L.R.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:36
起始页码: 21968
结束页码: 21977
语种: 英语
英文关键词: BECCS ; Biofuels ; Ecosystem modeling ; Life cycle assessment ; Negative emissions
Scopus关键词: biofuel ; carbon ; cellulose ; alcohol ; biofuel ; carbon ; alcohol production ; Article ; bioenergy ; carbon footprint ; carbon storage ; case study ; climate ; climate change ; ecosystem restoration ; energy yield ; environmental management ; forest management ; grassland ; harvesting ; land use ; pasture ; priority journal ; reforestation ; simulation ; species cultivation ; adverse event ; biotechnology ; chemistry ; crop ; ecosystem ; greenhouse gas ; metabolism ; Biofuels ; Biotechnology ; Carbon ; Cellulose ; Crops, Agricultural ; Ecosystem ; Ethanol ; Greenhouse Gases
英文摘要: Biofuel and bioenergy systems are integral to most climate stabilization scenarios for displacement of transport sector fossil fuel use and for producing negative emissions via carbon capture and storage (CCS). However, the net greenhouse gas mitigation benefit of such pathways is controversial due to concerns around ecosystem carbon losses from land use change and foregone sequestration benefits from alternative land uses. Here, we couple bottom-up ecosystem simulation with models of cellulosic biofuel production and CCS in order to track ecosystem and supply chain carbon flows for current and future biofuel systems, with comparison to competing land-based biological mitigation schemes. Analyzing three contrasting US case study sites, we show that on land transitioning out of crops or pasture, switchgrass cultivation for cellulosic ethanol production has per-hectare mitigation potential comparable to reforestation and severalfold greater than grassland restoration. In contrast, harvesting and converting existing secondary forest at those sites incurs large initial carbon debt requiring long payback periods. We also highlight how plausible future improvements in energy crop yields and biorefining technology together with CCS would achieve mitigation potential 4 and 15 times greater than forest and grassland restoration, respectively. Finally, we show that recent estimates of induced land use change are small relative to the opportunities for improving system performance that we quantify here. While climate and other ecosystem service benefits cannot be taken for granted from cellulosic biofuel deployment, our scenarios illustrate how conventional and carbon-negative biofuel systems could make a near-term, robust, and distinctive contribution to the climate challenge. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164047
Appears in Collections:气候变化与战略

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作者单位: Field, J.L., Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, United States; Richard, T.L., Department of Agricultural and Biological Engineering, Pennsylvania State University, University Park, PA 16802, United States; Smithwick, E.A.H., Department of Geography, Pennsylvania State University, University Park, PA 16802, United States, Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, United States; Cai, H., Energy Systems Division, Argonne National Laboratory, Lemont, IL 60439, United States; Laser, M.S., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States; LeBauer, D.S., Arizona Experiment Station, University of Arizona, Tucson, AZ 85721, United States; Long, S.P., Department of Crop Sciences, University of Illinois at Urbana–Champaign, Urbana, IL 61801, United States, Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom, Department of Plant Biology, University of Illinois at Urbana–Champaign, Urbana, IL 61801, United States; Paustian, K., Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, United States, Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523, United States; Qin, Z., Energy Systems Division, Argonne National Laboratory, Lemont, IL 60439, United States, School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, 510245, China, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China; Sheehan, J.J., School of Agricultural Engineering, University of Campinas, Campinas, SP, 13083-875, Brazil, Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, United States; Smith, P., Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 3UU, United Kingdom; Wang, M.Q., Energy Systems Division, Argonne National Laboratory, Lemont, IL 60439, United States; Lynd, L.R., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States

Recommended Citation:
Field J.L.,Richard T.L.,Smithwick E.A.H.,et al. Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(36)
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