气候变化领域集成服务门户(CCPortal): Mitigating the contrail cirrus climate impact by reducing aircraft soot number emissions

CCPortal

DOI	10.1038/s41612-018-0046-4
	Mitigating the contrail cirrus climate impact by reducing aircraft soot number emissions
	Burkhardt U.; Bock L.; Bier A.
发表日期	2018
ISSN	23973722
卷号	1 期号:1
英文摘要	Contrail cirrus are a major component of the climate forcing due to air traffic. For a given contrail cirrus cover, ice water content and ice crystal shape, their impact on radiation is dependent on the number and size of ice crystals. Here we use a global climate model to study the impact of a reduction in initially formed ice crystal numbers, as may be caused by reduced soot number emissions. We find that for reduced initial ice crystal numbers the ice water content is decreased and ice crystal sizes increased, leading to a reduction in contrail cirrus optical depth and doubling the fraction of contrail cirrus that cannot be detected by satellite remote sensing. Contrail cirrus lifetimes and coverage are strongly reduced leading to significant reductions in contrail cirrus radiative forcing. The global climate impact of contrail cirrus is nonlinearly dependent on the reduction in initial ice crystal numbers. A reduction in the initial ice crystal number of 80% leads to a decrease in contrail cirrus radiative forcing by 50%, whereas a twofold reduction leads to a decrease in radiative forcing by approximately 20%. Only a few contrail cirrus outbreaks explain a large percentage of the climate impact. The contrail cirrus climate impact can be effectively mitigated by reducing initial ice crystal concentrations in such outbreak situations. Our results are important for assessments dealing with mitigating the climate impact of aviation and discussions about the use of alternative fuels or lean combustion in aviation. © 2018, The Author(s).
语种	英语
scopus关键词	air traffic; cirrus; climate effect; climate forcing; cloud classification; cloud microphysics; ice crystal; optical depth; radiative forcing
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178173
作者单位	Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
推荐引用方式 GB/T 7714	Burkhardt U.,Bock L.,Bier A.. Mitigating the contrail cirrus climate impact by reducing aircraft soot number emissions[J],2018,1(1).
APA	Burkhardt U.,Bock L.,&Bier A..(2018).Mitigating the contrail cirrus climate impact by reducing aircraft soot number emissions.npj Climate and Atmospheric Science,1(1).
MLA	Burkhardt U.,et al."Mitigating the contrail cirrus climate impact by reducing aircraft soot number emissions".npj Climate and Atmospheric Science 1.1(2018).