气候变化领域集成服务门户(CCPortal): Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels

CCPortal

DOI	10.1073/pnas.1920877117
	Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels
	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.
发表日期	2020
ISSN	0027-8424
起始页码	21968
结束页码	21977
卷号	117 期号:36
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.
英文关键词	BECCS; Biofuels; Ecosystem modeling; Life cycle assessment; Negative emissions
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160813
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 Bio...
推荐引用方式 GB/T 7714	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],2020,117(36).
APA	Field J.L..,Richard T.L..,Smithwick E.A.H..,Cai H..,Laser M.S..,...&Lynd L.R..(2020).Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels.Proceedings of the National Academy of Sciences of the United States of America,117(36).
MLA	Field J.L.,et al."Robust paths to net greenhouse gas mitigation and negative emissions via advanced biofuels".Proceedings of the National Academy of Sciences of the United States of America 117.36(2020).