气候变化领域集成服务门户(CCPortal): Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid-and high latitudes

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DOI	10.5194/acp-21-9065-2021
	Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid-and high latitudes
	Williamson C.J.; Kupc A.; Rollins A.; Kazil J.; Froyd K.D.; Ray E.A.; Murphy D.M.; Schill G.P.; Peischl J.; Thompson C.; Bourgeois I.; Ryerson T.B.; Diskin G.S.; Digangi J.P.; Blake D.R.; Bui T.P.V.; Dollner M.; Weinzierl B.; Brock C.A.
发表日期	2021
ISSN	1680-7316
起始页码	9065
结束页码	9088
卷号	21 期号:11
英文摘要	The details of aerosol processes and size distributions in the stratosphere are important for both heterogeneous chemistry and aerosol-radiation interactions. Using in situ, global-scale measurements of the size distribution of particles with diameters > 3 nm from the NASA Atmospheric Tomography Mission (ATom), we identify a mode of aerosol smaller than 12g nm in the lowermost stratosphere (LMS) at mid- and high latitudes. This mode is substantial only in the Northern Hemisphere (NH) and was observed in all four seasons. We also observe elevated SO2, an important precursor for new particle formation (NPF) and growth, in the NH LMS. We use box modelling and thermodynamic calculations to show that NPF can occur in the LMS conditions observed on ATom. Aircraft emissions are shown as likely sources of this SO2, as well as a potential source of nucleation mode particles directly emitted by or formed in the plume of the engines. These nucleation mode particles have the potential to grow to larger sizes and to coagulate with larger aerosol, affecting heterogeneous chemistry and aerosol-radiation interactions. Understanding all sources and characteristics of stratospheric aerosols is important in the context of anthropogenic climate change as well as proposals for climate intervention via stratospheric sulfur injection. This analysis not only adds to the, currently sparse, observations of the global impact of aviation, but also introduces another aspect of climate influence, namely a size distribution shift of the background aerosol distribution in the LMS. © 2021 Christina J. Williamson et al.
语种	英语
scopus关键词	aerosol; aerosol composition; coagulation; concentration (composition); formation mechanism; Northern Hemisphere; particle size; satellite data; size distribution; thermodynamics
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/246807
作者单位	Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Faculty of Physics, Aerosol Physics and Environmental Physics, University of Vienna, Vienna, 1090, Austria; NASA Langley Research Center, Hampton, VA 23681, United States; Department of Chemistry, University of California Irvine, Irvine, CA 92697, United States; Earth Science Division, NASA Ames Research Center, Moffett Field, CA, United States
推荐引用方式 GB/T 7714	Williamson C.J.,Kupc A.,Rollins A.,et al. Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid-and high latitudes[J],2021,21(11).
APA	Williamson C.J..,Kupc A..,Rollins A..,Kazil J..,Froyd K.D..,...&Brock C.A..(2021).Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid-and high latitudes.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Williamson C.J.,et al."Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid-and high latitudes".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).