文章基本信息

标题：Proper accounting for time increases crop-based biofuels’ greenhouse gas deficit versus petroleum
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作者：M O’Hare ; R J Plevin ; J I Martin 等
期刊名称：Environmental Research Letters
印刷版ISSN：1748-9326
电子版ISSN：1748-9326
出版年度：2009
卷号：4
期号：2
页码：024001
DOI：10.1088/1748-9326/4/2/024001
语种：English
出版社：IOP Publishing Ltd
摘要：The global warming intensities of crop-based biofuels and fossil fuels differ not only in amount but also in their discharge patterns over time. Early discharges, for example, from market-mediated land use change, will have created more global warming by any time in the future than later discharges, owing to the slow decay of atmospheric CO₂. A spreadsheet model of this process, BTIME, captures this important time pattern effect using the Bern CO₂ decay model to allow fuels to be compared for policy decisions on the basis of their real warming effects with a variety of user-supplied parameter values. The model also allows economic discounting of climate effects extended far into the future. Compared to approaches that simply sum greenhouse gas emissions over time, recognizing the physics of atmospheric CO₂ decay significantly increases the deficit relative to fossil fuel of any biofuel causing land use change.