气候变化领域集成服务门户(CCPortal): Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA)

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DOI	10.5194/acp-21-18123-2021
	Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA)
	Tomlin J.M.; Jankowski K.A.; Veghte D.P.; China S.; Wang P.; Fraund M.; Weis J.; Zheng G.; Wang Y.; Rivera-Adorno F.; Raveh-Rubin S.; Knopf D.A.; Wang J.; Gilles M.K.; Moffet R.C.; Laskin A.
发表日期	2021
ISSN	1680-7316
起始页码	18123
结束页码	18146
卷号	21 期号:24
英文摘要	Long-range transport of continental emissions has a far-reaching influence over remote regions, resulting in substantial change in the size, morphology, and composition of the local aerosol population and cloud condensation nuclei (CCN) budget. Here, we investigate the physicochemical properties of atmospheric particles collected on board a research aircraft flown over the Azores during the winter 2018 Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA) campaign. Particles were collected within the marine boundary layer (MBL) and free troposphere (FT) after long-range atmospheric transport episodes facilitated by dry intrusion (DI) events. Chemical and physical properties of individual particles were investigated using complementary capabilities of computer-controlled scanning electron microscopy and X-ray spectromicroscopy to probe particle external and internal mixing state characteristics. Furthermore, real-time measurements of aerosol size distribution, cloud condensation nuclei (CCN) concentration, and back-trajectory calculations were utilized to help bring into context the findings from offline spectromicroscopy analysis. While carbonaceous particles were found to be the dominant particle type in the region, changes in the percent contribution of organics across the particle population (i.e., external mixing) shifted from 68% to 43% in the MBL and from 92% to 46% in FT samples during DI events. This change in carbonaceous contribution is counterbalanced by the increase in inorganics from 32% to 57% in the MBL and 8% to 55% in FT. The quantification of the organic volume fraction (OVF) of individual particles derived from X-ray spectromicroscopy, which relates to the multi-component internal composition of individual particles, showed a factor of 2.06±0.16 and 1.11±0.04 increase in the MBL and FT, respectively, among DI samples. We show that supplying particle OVF into the κ-Köhler equation can be used as a good approximation of field-measured in situ CCN concentrations. We also report changes in the κ values in the MBL from κMBL, non-DI=0.48 to κMBL, DI=0.41, while changes in the FT result in κFT, non-DI=0.36 to κFT, DI=0.33, which is consistent with enhancements in OVF followed by the DI episodes. Our observations suggest that entrainment of particles from long-range continental sources alters the mixing state population and CCN properties of aerosol in the region. The work presented here provides field observation data that can inform atmospheric models that simulate sources and particle composition in the eastern North Atlantic. © 2021 Jay M. Tomlin et al.
语种	英语
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/246371
作者单位	Department of Chemistry, Purdue University, West Lafayette, IN 47907, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States; Center for Electron Microscopy and Analysis, Ohio State University, Columbus, OH 43212, United States; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, United States; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Center for Aerosol Science and Engineering, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, United States; Environmental and Climate Science Department, Brookhaven National Laboratory, Upton, NY 11973, United States; Department of Civil, Architectural and Environmental Engineering, Missouri University of Sci...
推荐引用方式 GB/T 7714	Tomlin J.M.,Jankowski K.A.,Veghte D.P.,et al. Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA)[J],2021,21(24).
APA	Tomlin J.M..,Jankowski K.A..,Veghte D.P..,China S..,Wang P..,...&Laskin A..(2021).Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA).ATMOSPHERIC CHEMISTRY AND PHYSICS,21(24).
MLA	Tomlin J.M.,et al."Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA)".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.24(2021).