气候变化领域集成服务门户(CCPortal): Effects of black carbon mitigation on Arctic climate

CCPortal

DOI	10.5194/acp-20-5527-2020
	Effects of black carbon mitigation on Arctic climate
	Kühn T.; Kupiainen K.; Miinalainen T.; Kokkola H.; Paunu V.-V.; Laakso A.; Tonttila J.; Van Dingenen R.; Kulovesi K.; Karvosenoja N.; Lehtinen K.E.J.
发表日期	2020
ISSN	1680-7316
起始页码	5527
结束页码	5546
卷号	20 期号:9
英文摘要	pWe use the ECHAM-HAMMOZ aerosol-climate model to assess the effects of black carbon (BC) mitigation measures on Arctic climate. To this end we constructed several mitigation scenarios that implement all currently existing legislation and then implement further reductions of BC in a successively increasing global area, starting from the eight member states of the Arctic Council, expanding to its active observer states, then to all observer states, and finally to the entire globe. These scenarios also account for the reduction of the co-emitted organic carbon (OC) and sulfate (SU). We find that, even though the additional BC emission reductions in the member states of the Arctic Council are small, the resulting reductions in Arctic BC mass burdens can be substantial, especially in the lower troposphere close to the surface. This in turn means that reducing BC emissions only in the Arctic Council member states can reduce BC deposition in the Arctic by about 30 % compared to the current legislation, which is about 60 % of what could be achieved if emissions were reduced globally. Emission reductions further south affect Arctic BC concentrations at higher altitudes and thus only have small additional effects on BC deposition in the Arctic. The direct radiative forcing scales fairly well with the total amount of BC emission reduction, independent of the location of the emission source, with a maximum direct radiative forcing in the Arctic of about span classCombining double low line"inline-formula"-0.4/span W mspan classCombining double low line"inline-formula"-2/span for a global BC emission reduction. On the other hand, the Arctic effective radiative forcing due to the BC emission reductions, which accounts for aerosol-cloud interactions, is small compared to the direct aerosol radiative forcing. This happens because BC-and OC-containing particles can act as cloud condensation nuclei, which affects cloud reflectivity and lifetime and counteracts the direct radiative forcing of BC. Additionally, the effective radiative forcing is accompanied by very large uncertainties that originate from the strong natural variability of meteorology, cloud cover, and surface albedo in the Arctic. We further used the TM5-FASST model to assess the benefits of the aerosol emission reductions for human health. We found that a full implementation in all Arctic Council member and observer states could reduce the annual global number of premature deaths by 329 000 by the year 2030, which amounts to 9 % of the total global premature deaths due to particulate matter. © Author(s) 2020.
语种	英语
scopus关键词	arctic environment; black carbon; climate modeling; emission control; mitigation; mortality; radiative forcing; Arctic
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141357
作者单位	Department of Applied Physics, University of Eastern Finland (UEF), Kuopio, Finland; Atmospheric Research Centre of Eastern Finland, Finnish Meteorological Institute (FMI), Kuopio, Finland; Finnish Environment Institute (SYKE), Helsinki, Finland; European Commission, Joint Research Centre (JRC), Ispra, VA, Italy; School of Law, University of Eastern Finland (UEF), Joensuu, Finland; Finnish Ministry of the Environment, Helsinki, Finland
推荐引用方式 GB/T 7714	Kühn T.,Kupiainen K.,Miinalainen T.,et al. Effects of black carbon mitigation on Arctic climate[J],2020,20(9).
APA	Kühn T..,Kupiainen K..,Miinalainen T..,Kokkola H..,Paunu V.-V..,...&Lehtinen K.E.J..(2020).Effects of black carbon mitigation on Arctic climate.Atmospheric Chemistry and Physics,20(9).
MLA	Kühn T.,et al."Effects of black carbon mitigation on Arctic climate".Atmospheric Chemistry and Physics 20.9(2020).