气候变化领域集成服务门户(CCPortal): Black Carbon and Precipitation: An Energetics Perspective

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DOI	10.1029/2019JD032239
	Black Carbon and Precipitation: An Energetics Perspective
	Sand M.; Samset B.H.; Tsigaridis K.; Bauer S.E.; Myhre G.
发表日期	2020
ISSN	2169897X
卷号	125 期号:13
英文摘要	Black carbon (BC) aerosols influence precipitation through a range of processes. The climate response to the presence of BC is however highly dependent on its vertical distribution. Here, we analyze the changes in the energy budget and precipitation impacts of adding a layer of BC at a range of altitudes in two independent global climate models. The models are run with atmosphere-only and slab ocean model setup to analyze both fast and slow responses, respectively. Globally, precipitation changes are tightly coupled to the energy budget. We decompose the precipitation change into contributions from absorption of solar radiation, atmospheric longwave radiative cooling, and sensible heat flux at the surface. We find that for atmosphere-only simulations, BC rapidly suppresses precipitation, independent of altitude, mainly because of strong atmospheric absorption. This reduction is offset by increased atmospheric radiative longwave cooling and reduced sensible heat flux at the surface, but not of sufficient magnitude to prevent reduced precipitation. On longer timescales, when the surface temperature is allowed to respond, we find that the precipitation increase associated with surface warming can compensate for the initial reduction, particularly for BC in the lower atmosphere. Even though the underlying processes are strikingly similar in the two models, the resulting change in precipitation and temperature by BC differ quite substantially. ©2020. The Authors.
英文关键词	black carbon aerosols; energy budget; precipitation; rapid adjustments
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185937
作者单位	CICERO Center for International Climate Research—Oslo, Oslo, Norway; Center for Climate Systems Research, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States
推荐引用方式 GB/T 7714	Sand M.,Samset B.H.,Tsigaridis K.,et al. Black Carbon and Precipitation: An Energetics Perspective[J],2020,125(13).
APA	Sand M.,Samset B.H.,Tsigaridis K.,Bauer S.E.,&Myhre G..(2020).Black Carbon and Precipitation: An Energetics Perspective.Journal of Geophysical Research: Atmospheres,125(13).
MLA	Sand M.,et al."Black Carbon and Precipitation: An Energetics Perspective".Journal of Geophysical Research: Atmospheres 125.13(2020).