气候变化领域集成服务门户(CCPortal): Seasonal Differences and Variability of Concentrations, Chemical Composition, and Cloud Condensation Nuclei of Marine Aerosol Over the North Atlantic

CCPortal

DOI	10.1029/2020JD033145
	Seasonal Differences and Variability of Concentrations, Chemical Composition, and Cloud Condensation Nuclei of Marine Aerosol Over the North Atlantic
	Saliba G.; Chen C.-L.; Lewis S.; Russell L.M.; Quinn P.K.; Bates T.S.; Bell T.G.; Lawler M.J.; Saltzman E.S.; Sanchez K.J.; Moore R.; Shook M.; Rivellini L.-H.; Lee A.; Baetge N.; Carlson C.A.; Behrenfeld M.J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:19
英文摘要	The majority of the aerosol particle number (condensation nuclei or CN) in the marine boundary layer (MBL) consists of sulfate and organic compounds that have been shown to provide a large fraction of the cloud condensation nuclei (CCN). Here we use submicron non-refractory Aerosol Mass Spectrometer (AMS) and filter measurements of organic and sulfate components of aerosol particles measured during four North Atlantic Aerosol and Marine Ecosystems Study (NAAMES) research cruises to assess the sources and contributions of submicron organic and sulfate components for CCN concentrations in the MBL during four different seasons. Submicron hydroxyl group organic mass (OM) correlated strongly to sodium concentrations during clean marine periods (R = 0.9), indicating that hydroxyl group OM can serve as a proxy for sea-spray OM in ambient measurements. Sea-spray OM contributed 45% of the sum of sea-spray OM and sea salt during late spring (biomass climax phase) compared to <20% for other seasons, but the seasonal difference was not statistically significant. The contribution of non-combustion sources during clean marine periods to submicron OM was 47 to 88% and to non-sea-salt sulfate 31 to 86%, with likely sources being marine and biogenic. The remaining submicron OM and sulfate were likely associated with ship or continental sources, including biomass burning, even during clean marine periods. The seasonal contribution from secondary sulfate and OM components to submicron aerosol mass was highest during late spring (60%), when biogenic emissions are expected to be highest, and lowest during winter (18%). Removing submicron sea-spray OM decreased CCN concentrations by <10% because of competing effects from increased hygroscopicity and decreased particle size. During all seasons, adding biogenic secondary sulfate increased hygroscopicity, particle size, and CCN concentrations at 0.1–0.3% supersaturations by 5–66%. The largest change was during early spring when the fraction of hygroscopic sulfate components in the 0.1–0.2 μm size range was highest (80%). During continental periods, the increased contribution from low-hygroscopicity organic components to 0.1–0.2 μm diameter particles reduces the CCN/CN by 20–100% for three seasons despite the increased CN and mass concentrations. These results illustrate the important role of the chemical composition of particles with diameters 0.1–0.2 μm for controlling CCN in the MBL. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	CCN; NAAMES; organics; sea spray; sulfate
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185710
作者单位	Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States; Plymouth Marine Laboratory, Plymouth, United Kingdom; Department of Earth System Science, University of California, Irvine, CA, United States; NASA Langley Research Center, Hampton, VA, United States; Universities Space Research Association, Columbia, MD, United States; Environmental Research Institute, National University of Singapore, Singapore; Department of Civil and Environmental Engineering, National University of Singapore, Singapore; Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, United States; Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, United States
推荐引用方式 GB/T 7714	Saliba G.,Chen C.-L.,Lewis S.,et al. Seasonal Differences and Variability of Concentrations, Chemical Composition, and Cloud Condensation Nuclei of Marine Aerosol Over the North Atlantic[J],2020,125(19).
APA	Saliba G..,Chen C.-L..,Lewis S..,Russell L.M..,Quinn P.K..,...&Behrenfeld M.J..(2020).Seasonal Differences and Variability of Concentrations, Chemical Composition, and Cloud Condensation Nuclei of Marine Aerosol Over the North Atlantic.Journal of Geophysical Research: Atmospheres,125(19).
MLA	Saliba G.,et al."Seasonal Differences and Variability of Concentrations, Chemical Composition, and Cloud Condensation Nuclei of Marine Aerosol Over the North Atlantic".Journal of Geophysical Research: Atmospheres 125.19(2020).