气候变化领域集成服务门户(CCPortal): Overview paper: New insights into aerosol and climate in the Arctic

CCPortal

DOI	10.5194/acp-19-2527-2019
	Overview paper: New insights into aerosol and climate in the Arctic
	Abbatt J.P.D.; Richard Leaitch W.; Aliabadi A.A.; Bertram A.K.; Blanchet J.-P.; Boivin-Rioux A.; Bozem H.; Burkart J.; Chang R.Y.W.; Charette J.; Chaubey J.P.; Christensen R.J.; Cirisan A.; Collins D.B.; Croft B.; Dionne J.; Evans G.J.; Fletcher C.G.; Gali M.; Ghahremaninezhad R.; Girard E.; Gong W.; Gosselin M.; Gourdal M.; Hanna S.J.; Hayashida H.; Herber A.B.; Hesaraki S.; Hoor P.; Huang L.; Hussherr R.; Irish V.E.; Keita S.A.; Kodros J.K.; Köllner F.; Kolonjari F.; Kunkel D.; Ladino L.A.; Law K.; Levasseur M.; Libois Q.; Liggio J.; Lizotte M.; MacDonald K.M.; Mahmood R.; Martin R.V.; Mason R.H.; Miller L.A.; Moravek A.; Mortenson E.; Mungall E.L.; Murphy J.G.; Namazi M.; Norman A.-L.; O'Neill N.T.; Pierce J.R.; Russell L.M.; Schneider J.; Schulz H.; Sharma S.; Si M.; Staebler R.M.; Steiner N.S.; Thomas J.L.; Von Salzen K.; Wentzell J.J.B.; Willis M.D.; Wentworth G.R.; Xu J.-W.; Yakobi-Hancock J.D.
发表日期	2019
ISSN	16807316
起始页码	2527
结束页码	2560
卷号	19 期号:4
英文摘要	Motivated by the need to predict how the Arctic atmosphere will change in a warming world, this article summarizes recent advances made by the research consortium NETCARE (Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments) that contribute to our fundamental understanding of Arctic aerosol particles as they relate to climate forcing. The overall goal of NETCARE research has been to use an interdisciplinary approach encompassing extensive field observations and a range of chemical transport, earth system, and biogeochemical models. Several major findings and advances have emerged from NETCARE since its formation in 2013. (1) Unexpectedly high summertime dimethyl sulfide (DMS) levels were identified in ocean water (up to 75 nM) and the overlying atmosphere (up to 1 ppbv) in the Canadian Arctic Archipelago (CAA). Furthermore, melt ponds, which are widely prevalent, were identified as an important DMS source (with DMS concentrations of up to 6 nM and a potential contribution to atmospheric DMS of 20 % in the study area). (2) Evidence of widespread particle nucleation and growth in the marine boundary layer was found in the CAA in the summertime, with these events observed on 41 % of days in a 2016 cruise. As well, at Alert, Nunavut, particles that are newly formed and grown under conditions of minimal anthropogenic influence during the months of July and August are estimated to contribute 20 % to 80 % of the 30-50 nm particle number density. DMS-oxidation-driven nucleation is facilitated by the presence of atmospheric ammonia arising from seabird-colony emissions, and potentially also from coastal regions, tundra, and biomass burning. Via accumulation of secondary organic aerosol (SOA), a significant fraction of the new particles grow to sizes that are active in cloud droplet formation. Although the gaseous precursors to Arctic marine SOA remain poorly defined, the measured levels of common continental SOA precursors (isoprene and monoterpenes) were low, whereas elevated mixing ratios of oxygenated volatile organic compounds (OVOCs) were inferred to arise via processes involving the sea surface microlayer. (3) The variability in the vertical distribution of black carbon (BC) under both springtime Arctic haze and more pristine summertime aerosol conditions was observed. Measured particle size distributions and mixing states were used to constrain, for the first time, calculations of aerosol-climate interactions under Arctic conditions. Aircraft- and ground-based measurements were used to better establish the BC source regions that supply the Arctic via long-range transport mechanisms, with evidence for a dominant springtime contribution from eastern and southern Asia to the middle troposphere, and a major contribution from northern Asia to the surface. (4) Measurements of ice nucleating particles (INPs) in the Arctic indicate that a major source of these particles is mineral dust, likely derived from local sources in the summer and long-range transport in the spring. In addition, INPs are abundant in the sea surface microlayer in the Arctic, and possibly play a role in ice nucleation in the atmosphere when mineral dust concentrations are low. (5) Amongst multiple aerosol components, BC was observed to have the smallest effective deposition velocities to high Arctic snow (0.03 cm s1). © 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol; biogeochemistry; boundary layer; climate forcing; dimethylsulfide; interdisciplinary approach; nucleation; regional climate; Alert; Arctic; Canada; Canadian Arctic; Ellesmere Island; Nunavut; Queen Elizabeth Islands
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/144607
作者单位	Department of Chemistry, University of Toronto, Toronto, Canada; Environment and Climate Change Canada, Toronto, Canada; School of Engineering, University of Guelph, Guelph, Canada; Department of Chemistry, University of British Columbia, Vancouver, Canada; Department of Earth and Atmospheric Sciences, Université du Quebec A Montréal, Montreal, Canada; Institut des Sciences de la Mer de Rimouski, Universite DuQuebec, Rimouski, Canada; Institute for Atmospheric Physics, Johannes Gutenberg University, Mainz, Germany; Aerosol Physics and Environmental Physics, University of Vienna, Vienna, Austria; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada; Department of Chemistry, Bucknell University, Lewisburg, United States; Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada; Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada; Department of Biology, Universite Laval, Quebec City, Canada; Sch...
推荐引用方式 GB/T 7714	Abbatt J.P.D.,Richard Leaitch W.,Aliabadi A.A.,et al. Overview paper: New insights into aerosol and climate in the Arctic[J],2019,19(4).
APA	Abbatt J.P.D..,Richard Leaitch W..,Aliabadi A.A..,Bertram A.K..,Blanchet J.-P..,...&Yakobi-Hancock J.D..(2019).Overview paper: New insights into aerosol and climate in the Arctic.Atmospheric Chemistry and Physics,19(4).
MLA	Abbatt J.P.D.,et al."Overview paper: New insights into aerosol and climate in the Arctic".Atmospheric Chemistry and Physics 19.4(2019).