气候变化领域集成服务门户(CCPortal): Surface warming and wetting due to methane's long-wave radiative effects muted by short-wave absorption

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DOI	10.1038/s41561-023-01144-z
	Surface warming and wetting due to methane's long-wave radiative effects muted by short-wave absorption
	Allen, Robert J. J.; Zhao, Xueying; Randles, Cynthia A. A.; Kramer, Ryan J. J.; Samset, Bjorn H.; Smith, Christopher J. J.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
页码	19
英文摘要	Although greenhouse gases absorb primarily long-wave radiation, they also absorb short-wave radiation. Recent studies have highlighted the importance of methane short-wave absorption, which enhances its stratospherically adjusted radiative forcing by up to similar to 15%. The corresponding climate impacts, however, have been only indirectly evaluated and thus remain largely unquantified. Here we present a systematic, unambiguous analysis using one model and separate simulations with and without methane short-wave absorption. We find that methane short-wave absorption counteracts similar to 30% of the surface warming associated with its long-wave radiative effects. An even larger impact occurs for precipitation as methane short-wave absorption offsets similar to 60% of the precipitation increase relative to its long-wave radiative effects. The methane short-wave-induced cooling is due largely to cloud rapid adjustments, including increased low-level clouds, which enhance the reflection of incoming short-wave radiation, and decreased high-level clouds, which enhance outgoing long-wave radiation. The cloud responses, in turn, are related to the profile of atmospheric solar heating and corresponding changes in temperature and relative humidity. Despite our findings, methane remains a potent contributor to global warming, and efforts to reduce methane emissions are vital for keeping global warming well below 2 degrees C above preindustrial values. Climate simulations suggest that the contribution of methane to climate warming and wetting due to absorption of long-wave radiation is partially counteracted by short-wave absorption.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000950430500001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272612
作者单位	University of California System; University of California Riverside; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; University System of Maryland; University of Maryland Baltimore County; University of Leeds; International Institute for Applied Systems Analysis (IIASA)
推荐引用方式 GB/T 7714	Allen, Robert J. J.,Zhao, Xueying,Randles, Cynthia A. A.,et al. Surface warming and wetting due to methane's long-wave radiative effects muted by short-wave absorption[J],2022:19.
APA	Allen, Robert J. J.,Zhao, Xueying,Randles, Cynthia A. A.,Kramer, Ryan J. J.,Samset, Bjorn H.,&Smith, Christopher J. J..(2022).Surface warming and wetting due to methane's long-wave radiative effects muted by short-wave absorption.NATURE GEOSCIENCE,19.
MLA	Allen, Robert J. J.,et al."Surface warming and wetting due to methane's long-wave radiative effects muted by short-wave absorption".NATURE GEOSCIENCE (2022):19.