气候变化领域集成服务门户(CCPortal): Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region

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DOI	10.5194/acp-21-1889-2021
	Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region
	Croft B.; Martin R.V.; Moore R.H.; Ziemba L.D.; Crosbie E.C.; Liu H.; Russell L.M.; Saliba G.; Wisthaler A.; Müller M.; Schiller A.; Galí M.; Chang R.Y.-W.; McDuffie E.E.; Bilsback K.R.; Pierce J.R.
发表日期	2021
ISSN	1680-7316
起始页码	1889
结束页码	1916
卷号	21 期号:3
英文摘要	Aerosols over Earth s remote and spatially extensive ocean surfaces have important influences on planetary climate. However, these aerosols and their effects remain poorly understood, in part due to the remoteness and limited observations over these regions. In this study, we seek to understand factors that shape marine aerosol size distributions and composition in the northwest Atlantic Ocean region. We use the GEOS-Chem model with the TwO-Moment Aerosol Sectional (TOMAS) microphysics algorithm model to interpret measurements collected from ship and aircraft during the four seasonal campaigns of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) conducted between 2015 and 2018. Observations from the NAAMES campaigns show enhancements in the campaign-median number of aerosols with diameters larger than 3 nm in the lower troposphere (below 6 km), most pronounced during the phytoplankton bloom maxima (May/June) below 2 km in the free troposphere. Our simulations, combined with NAAMES ship and aircraft measurements, suggest several key factors that contribute to aerosol number and size in the northwest Atlantic lower troposphere, with significant regional-mean (40-60-N and 20-50-W) cloud-Albedo aerosol indirect effect (AIE) and direct radiative effect (DRE) processes during the phytoplankton bloom. These key factors and their associated simulated radiative effects in the region include the following: (1) particle formation near and above the marine boundary layer (MBL) top (AIE:-3.37Wm-2, DRE:-0.62Wm-2); (2) particle growth due to marine secondary organic aerosol (MSOA) as the nascent particles subside into the MBL, enabling them to become cloud-condensation-nuclei-sized particles (AIE:-2.27Wm-2, DRE:-0.10Wm-2); (3) particle formation and growth due to the products of dimethyl sulfide, above and within the MBL (-1.29Wm-2, DRE:-0.06Wm-2); (4) ship emissions (AIE:-0.62Wm-2, DRE:-0.05Wm-2); and (5) primary sea spray emissions (AIE: C0.04Wm-2, DRE:-0.79Wm-2). Our results suggest that a synergy of particle formation in the lower troposphere (particularly near and above the MBL top) and growth by MSOA contributes strongly to cloudcondensation-nuclei-sized particles with significant regional radiative effects in the northwest Atlantic. To gain confidence in radiative effect magnitudes, future work is needed to understand (1) the sources and temperature dependence of condensable marine vapors forming MSOA, (2) primary sea spray emissions, and (3) the species that can form new particles in the lower troposphere and grow these particles as they descend into the marine boundary layer. © 2021 American Society of Mechanical Engineers (ASME). All rights reserved.
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/168767
作者单位	Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, United States; Nasa Langley Research Center, Hampton, VA, United States; Science Systems and Applications Inc., Hampton, VA, United States; National Institute of Aerospace, Hampton, VA, United States; Scripps Institute of Oceanography, University of California San Diego, San diego, CA, United States; Institute for Ion Physics and Applied Physics, University of Innsbruck, Technikerstrasse 25, Innsbruck, 6020, Austria; Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, Oslo, 0315, Norway; Barcelona Supercomputing Center (BSC), Spain; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Croft B.,Martin R.V.,Moore R.H.,et al. Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region[J],2021,21(3).
APA	Croft B..,Martin R.V..,Moore R.H..,Ziemba L.D..,Crosbie E.C..,...&Pierce J.R..(2021).Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region.Atmospheric Chemistry and Physics,21(3).
MLA	Croft B.,et al."Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region".Atmospheric Chemistry and Physics 21.3(2021).