Global methane pledge versus carbon dioxide emission reduction
Global methane pledge versus carbon dioxide emission reduction
复制标题
全球甲烷承诺与二氧化碳减排
DOI:
10.1088/1748-9326/acf8dd
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发表时间:
2023
影响因子:
6.7
通讯作者:
Cael B
中科院分区:
文献类型:
--
作者:
Cael B
Methane (CH 4) is a potent greenhouse gas whose contribution to anthropogenic radiative forcing of the climate system is second only to carbon dioxide (CO 2). CH 4 emission reduction has become critical to global climate mitigation policy, resulting most notably in the global methane pledge (GMP), pledging a 30% reduction of CH 4 emissions by 2030. Methane is, however, much shorter-lived in the atmosphere than CO 2, so emissions reductions may have different impacts on global warming over time. We quantify the difference over time in global annual mean surface temperature of the GMP versus the equivalent amount of CO 2 emission reduction. The avoidance of CH 4 emissions in the 2020s due to the GMP initially results in greater relative cooling than the avoidance of the equivalent amount of CO 2 emissions over the same period, but less relative cooling after∼ 2060, when almost all CH 4 emitted during the 2020s has been removed from the atmosphere but much of the CO 2 emitted during the 2020s remains. However, if the GMP places the world on a lower CH 4 emissions trajectory after 2030, this results in a persistently and substantially greater reduction to global warming than the equivalent change in the CO 2 emissions trajectory, with a maximum difference of 0.22±0.06∘ C in 2055 and relative cooling for well over a century. This equates to a large difference in avoided climate change damages if momentum in CH 4 emission reduction from the GMP can be sustained after the 2020s. While the greatest reduction in warming is obtained by reducing both CH 4 and CO 2 emissions, our results underscore the striking global societal benefits of sustained reduction in CH 4 emissions.
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影响因子:
30.7
作者:
Dirk;S. Mittal;A. Gambhir;Robin D. Lamboll;H. Doukas;S. Giarola;A. Hawkes;K. Koasidis;A. Köberle;H. Mcjeon;Sigit Perdana;G. Peters;J. Rogelj;I. Sognnaes;M. Vielle;A. Nikas
通讯作者:
A. Nikas
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Raphael Calel;D. Stainforth
通讯作者:
D. Stainforth
影响因子:
5.2
作者:
Lutsko, Nicholas J.;Popp, Max
通讯作者:
Popp, Max
影响因子:
30.7
作者:
Frikk Nesje;M. Drupp;Mark C. Freeman;Ben Groom
通讯作者:
Ben Groom
影响因子:
5.9
作者:
Howard, Peter H.;Sterner, Thomas
通讯作者:
Sterner, Thomas