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Title: Nucleation and Growth of Atmospheric Particles

Abstract

New particle formation (NPF) in the atmospheric is a two-step process: Nucleation leads to the birth of stable nuclei that subsequently grow to sizes that can be detected and affect the atmosphere’s radiative properties. Our group is studying both of these processes. Our nucleation research is largely supported by NSF and involves measurements of neutral molecular clusters formed by nucleation with a new custom-designed mass spectrometer (the Cluster-CIMS) and measurements of nanoparticle size distributions as small as 1 nm with a new aerosol spectrometer (the DEG SMPS). These measurements are providing new insights into aspects of cluster behavior that affect nucleation rates. The U.S. DOE supports our research on nanoparticle growth rates. This research couples physical and chemical measurements of aerosol properties and behavior. The TDCIMS, which enables real-time measurements of composition for freshly nucleated particles as small as 8 nm and was developed with support from DOE, is the most important tool in this work. Our most important discoveries about processes that affect growth rates are summarized in a recent PNAS article (doi:10.1073/pnas.0912127107). In short, this work has shown that alkylammonium-carboxylate salts, formed, for example, by reactions between amines and carboxylic acids, account for 20–50% of the mass ofmore » freshly nucleated particles in locations that include Atlanta, Mexico City, Boulder, and Hyytiälä, while sulfates account for only about 10%. These newly discovered compounds help to explain the high growth rates of freshly nucleated particles that have been observed around the globe and help to explain why nucleation is an important atmospheric process, not just a scientific curiosity. Our poster will provide an overview of this work.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
978301
Report Number(s):
BNL-91136-2010-CP
R&D Project: 2011-BNL-EE630EECA-Budg; KP1205030; TRN: US201013%%746
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: The First Science Team Meeting of the Atmospheric System Research (ASR) Program; Bethesda, MD; 20100315 through 20100319
Country of Publication:
United States
Language:
English
Subject:
54; AEROSOLS; AMINES; CARBOXYLIC ACIDS; MASS SPECTROMETERS; MOLECULAR CLUSTERS; NUCLEATION; NUCLEI; SPECTROMETERS; SULFATES

Citation Formats

McMurry, P, Kuang, C, Barsanti, K, Eisele, F, Friedli, H, Scheckman, J, Titcombe, M, Williams, B, Zhao, J, and Smith, J. Nucleation and Growth of Atmospheric Particles. United States: N. p., 2010. Web.
McMurry, P, Kuang, C, Barsanti, K, Eisele, F, Friedli, H, Scheckman, J, Titcombe, M, Williams, B, Zhao, J, & Smith, J. Nucleation and Growth of Atmospheric Particles. United States.
McMurry, P, Kuang, C, Barsanti, K, Eisele, F, Friedli, H, Scheckman, J, Titcombe, M, Williams, B, Zhao, J, and Smith, J. Mon . "Nucleation and Growth of Atmospheric Particles". United States. https://www.osti.gov/servlets/purl/978301.
@article{osti_978301,
title = {Nucleation and Growth of Atmospheric Particles},
author = {McMurry, P and Kuang, C and Barsanti, K and Eisele, F and Friedli, H and Scheckman, J and Titcombe, M and Williams, B and Zhao, J and Smith, J},
abstractNote = {New particle formation (NPF) in the atmospheric is a two-step process: Nucleation leads to the birth of stable nuclei that subsequently grow to sizes that can be detected and affect the atmosphere’s radiative properties. Our group is studying both of these processes. Our nucleation research is largely supported by NSF and involves measurements of neutral molecular clusters formed by nucleation with a new custom-designed mass spectrometer (the Cluster-CIMS) and measurements of nanoparticle size distributions as small as 1 nm with a new aerosol spectrometer (the DEG SMPS). These measurements are providing new insights into aspects of cluster behavior that affect nucleation rates. The U.S. DOE supports our research on nanoparticle growth rates. This research couples physical and chemical measurements of aerosol properties and behavior. The TDCIMS, which enables real-time measurements of composition for freshly nucleated particles as small as 8 nm and was developed with support from DOE, is the most important tool in this work. Our most important discoveries about processes that affect growth rates are summarized in a recent PNAS article (doi:10.1073/pnas.0912127107). In short, this work has shown that alkylammonium-carboxylate salts, formed, for example, by reactions between amines and carboxylic acids, account for 20–50% of the mass of freshly nucleated particles in locations that include Atlanta, Mexico City, Boulder, and Hyytiälä, while sulfates account for only about 10%. These newly discovered compounds help to explain the high growth rates of freshly nucleated particles that have been observed around the globe and help to explain why nucleation is an important atmospheric process, not just a scientific curiosity. Our poster will provide an overview of this work.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {3}
}

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