气候变化领域集成服务门户(CCPortal): Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago

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DOI	10.5194/acp-19-2787-2019
	Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago
	Croft B.; Martin R.V.; Richard Leaitch W.; Burkart J.; Chang R.Y.-W.; Collins D.B.; Hayes P.L.; Hodshire A.L.; Huang L.; Kodros J.K.; Moravek A.; Mungall E.L.; Murphy J.G.; Sharma S.; Tremblay S.; Wentworth G.R.; D Willis M.; Abbatt J.P.D.; Pierce J.R.
发表日期	2019
ISSN	16807316
起始页码	2787
结束页码	2812
卷号	19 期号:5
英文摘要	Summertime Arctic aerosol size distributions are strongly controlled by natural regional emissions. Within this context, we use a chemical transport model with sizeresolved aerosol microphysics (GEOS-Chem-TOMAS) to interpret measurements of aerosol size distributions from the Canadian Arctic Archipelago during the summer of 2016, as part of the "NETwork on Climate and Aerosols: Addressing key uncertainties in Remote Canadian Environments" (NETCARE) project. Our simulations suggest that condensation of secondary organic aerosol (SOA) from precursor vapors emitted in the Arctic and near Arctic marine (ice-free seawater) regions plays a key role in particle growth events that shape the aerosol size distributions observed at Alert (82.5° N, 62.3° W), Eureka (80.1° N, 86.4° W), and along a NETCARE ship track within the Archipelago. We refer to this SOA as Arctic marine SOA (AMSOA) to reflect the Arctic marine-based and likely biogenic sources for the precursors of the condensing organic vapors. AMSOA from a simulated flux (500 μgm-2 day-1, north of 50° N) of precursor vapors (with an assumed yield of unity) reduces the summertime particle size distribution model-observation mean fractional error 2- to 4-fold, relative to a simulation without this AMSOA. Particle growth due to the condensable organic vapor flux contributes strongly (30 %-50 %) to the simulated summertime-mean number of particles with diameters larger than 20 nm in the study region. This growth couples with ternary particle nucleation (sulfuric acid, ammonia, and water vapor) and biogenic sulfate condensation to account for more than 90% of this simulated particle number, which represents a strong biogenic influence. The simulated fit to summertime size-distribution observations is further improved at Eureka and for the ship track by scaling up the nucleation rate by a factor of 100 to account for other particle precursors such as gas-phase iodine and/or amines and/or fragmenting primary particles that could be missing from our simulations. Additionally, the fits to the observed size distributions and total aerosol number concentrations for particles larger than 4 nm improve with the assumption that the AMSOA contains semivolatile species: the model-observation mean fractional error is reduced 2- to 3-fold for the Alert and ship track size distributions. AMSOA accounts for about half of the simulated particle surface area and volume distributions in the summertime Canadian Arctic Archipelago, with climaterelevant simulated summertime pan-Arctic-mean top-of-theatmosphere aerosol direct (-0:04Wm-2) and cloud-albedo indirect (-0:4Wm-2) radiative effects, which due to uncertainties are viewed as an order of magnitude estimate. Future work should focus on further understanding summertime Arctic sources of AMSOA. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; aerosol composition; condensation; marine atmosphere; nucleation; particle size; size distribution; summer; Alert; Canada; Canadian Arctic; Ellesmere Island; Eureka; 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/144599
作者单位	Dalhousie University, Department of Physics and Atmospheric Science, Halifax, NS B3H 4R2, Canada; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, United States; Environment and Climate Change Canada, Climate Research Division, Toronto, ON M3H 5T4, Canada; University of Toronto, Department of Chemistry, Toronto, ON M5S 3H6, Canada; Université de Montréal, Department of Chemistry, Montréal, QC H3C 3J7, Canada; Colorado State University, Department of Atmospheric Science, Fort Collins, CO 80423, United States; University of Vienna, Faculty of Physics, Aerosol Physics and Environmental Physics, Vienna, 1090, Austria; Bucknell University, Department of Chemistry, Lewisburg, PA 17837, United States; Institute of Chemical Engineering Sciences, ICE/FORTH, Patras, 26500, Greece; Alberta Environment and Parks, Environmental Monitoring and Science Division, Edmonton, AB T5J 5C6, Canada; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Croft B.,Martin R.V.,Richard Leaitch W.,et al. Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago[J],2019,19(5).
APA	Croft B..,Martin R.V..,Richard Leaitch W..,Burkart J..,Chang R.Y.-W..,...&Pierce J.R..(2019).Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago.Atmospheric Chemistry and Physics,19(5).
MLA	Croft B.,et al."Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago".Atmospheric Chemistry and Physics 19.5(2019).