期刊
NATURE COMMUNICATIONS
卷 1, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms1053
关键词
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资金
- Natural Environment Research Council (NERC)
- Economic and Social Research Council (ESRC)
- United States' Department of Energy (USDOE) Office of Science, Office of Biological and Environmental Research, Climate and Environmental Science Division, Mitigation Science Focus Area
- USDOE Office of Fossil Energy
- Battelle Memorial Institute [DE-AC05-76RL01830]
- Cooperative State Research Service of the U.S. Department of Agriculture
- New York State Energy Research and Development Authority
- VenEarth Group LLC
Production of biochar (the carbon (C)-rich solid formed by pyrolysis of biomass) and its storage in soils have been suggested as a means of abating climate change by sequestering carbon, while simultaneously providing energy and increasing crop yields. Substantial uncertainties exist, however, regarding the impact, capacity and sustainability of biochar at the global level. In this paper we estimate the maximum sustainable technical potential of biochar to mitigate climate change. Annual net emissions of carbon dioxide (CO2), methane and nitrous oxide could be reduced by a maximum of 1.8Pg CO2-C equivalent (CO2-C-e) per year (12% of current anthropogenic CO2-C-e emissions; 1Pg = 1Gt), and total net emissions over the course of a century by 130 Pg CO2-C-e, without endangering food security, habitat or soil conservation. Biochar has a larger climate-change mitigation potential than combustion of the same sustainably procured biomass for bioenergy, except when fertile soils are amended while coal is the fuel being offset.
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