气候变化领域集成服务门户(CCPortal): Demonstrating GWP: A means of reporting warming-equivalent emissions that captures the contrasting impacts of short- A nd long-lived climate pollutants

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DOI	10.1088/1748-9326/ab6d7e
	Demonstrating GWP: A means of reporting warming-equivalent emissions that captures the contrasting impacts of short- A nd long-lived climate pollutants
	Lynch J.; Cain M.; Pierrehumbert R.; Allen M.
发表日期	2020
ISSN	17489318
卷号	15 期号:4
英文摘要	The atmospheric lifetime and radiative impacts of different climate pollutants can both differ markedly, so metrics that equate emissions using a single scaling factor, such as the 100-year Global Warming Potential (GWP100), can be misleading. An alternative approach is to report emissions as 'warming-equivalents' that result in similar warming impacts without requiring a like-for-like weighting per emission. GWP, an alternative application of GWPs where the CO2-equivalence of short-lived climate pollutant emissions is predominantly determined by changes in their emission rate, provides a straightforward means of generating warming-equivalent emissions. In this letter we illustrate the contrasting climate impacts resulting from emissions of methane, a short-lived greenhouse gas, and CO2, and compare GWP100 and GWP CO2-equivalents for a number of simple emissions scenarios. We demonstrate that GWP provides a useful indication of warming, while conventional application of GWP100 falls short in many scenarios and particularly when methane emissions are stable or declining, with important implications for how we consider 'zero emission' or 'climate neutral' targets for sectors emitting different compositions of gases. We then illustrate how GWP can provide an improved means of assessing alternative mitigation strategies. GWP allows warming-equivalent emissions to be calculated directly from CO2-equivalent emissions reported using GWP100, consistent with the Paris Rulebook agreed by the UNFCCC, on condition that short-lived and cumulative climate pollutants are aggregated separately, which is essential for transparency. It provides a direct link between emissions and anticipated warming impacts, supporting stocktakes of progress towards a long-term temperature goal and compatible with cumulative emissions budgets. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Carbon dioxide equivalent; Carbon dioxide warming equivalent; Climate change; Global warming potential; Gwp; Methane
语种	英语
scopus关键词	Budget control; Carbon dioxide; Global warming; Greenhouse gases; Methane; Pollution; Atmospheric lifetime; Cumulative emissions; Emissions scenarios; Global warming potential; Methane emissions; Mitigation strategy; Pollutant emission; Radiative impacts; Gas emissions; carbon dioxide; carbon emission; global warming; greenhouse gas; methane; pollutant transport
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154087
作者单位	Department of Physics, University of Oxford, United Kingdom; Environmental Change Institute, University of Oxford, United Kingdom
推荐引用方式 GB/T 7714	Lynch J.,Cain M.,Pierrehumbert R.,et al. Demonstrating GWP: A means of reporting warming-equivalent emissions that captures the contrasting impacts of short- A nd long-lived climate pollutants[J],2020,15(4).
APA	Lynch J.,Cain M.,Pierrehumbert R.,&Allen M..(2020).Demonstrating GWP: A means of reporting warming-equivalent emissions that captures the contrasting impacts of short- A nd long-lived climate pollutants.Environmental Research Letters,15(4).
MLA	Lynch J.,et al."Demonstrating GWP: A means of reporting warming-equivalent emissions that captures the contrasting impacts of short- A nd long-lived climate pollutants".Environmental Research Letters 15.4(2020).