Publication:20121010105240

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Title The Importance of the Chemical and Physical Properties of Aerosols in Determining Their Transport and Residence Times in the Troposphere
Subtitles
Keywords
Publication Date 2006/01/01
Exact Publication Date Unknown
Publication Number
Publication Version
Authors Jeffrey S. Gaffney, Nancy A. Marley
Number of Pages 14
Original URL

http://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch014

Working URL

http://911datasets.org/images/ACS_919_Urban_Aerosols_and_Their_Impacts_2006.torrent

Abstract URL

http://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch014

Preprint URL


Company or Agency
Journal
Journal Issue
Book Urban Aerosols and Their Impact: Lessons Learned from the World Trade Center Tradgedy
Book Chapter 14
Book Start Page 286
Book End Page 299
doi 10.1021/bk-2006-0919.ch014
isbn 0-8412-3916-9
Cite as
Abstract Tropospheric aerosols are now clearly identified as one of the key "missing links"in many aspects of climate and radiative forcing processes, as well as in the health effects of air quality.This chapter examines some basic chemical and physical properties of aerosols that determine their diffusional growth, atmospheric removal by gravitational settling, and uptake of water leading to increased size and subsequent removal by both wet and dry deposition. The importance of aerosol size and chemical compositions in determining their atmospheric lifetimes is stressed, with particular attention to combustionderived carbonaceous soots. The atmospheric oxidation of "oily" soot surfaces to make these organic aerosols sufficiently hygroscopic for particle growth and atmospheric removal is expected to require a substantial time period. Mean residence times for submicron aerosols, ss determined by using natural radionuclides, support the observation that a significant fraction of fine aerosols (0.1-1 μm) have considerably longer atmospheric lifetimes than anticipated from normal washout and dry depositional processes of hygroscopic aerosols. It is concluded that the surface and chemical properties of aerosols and particulate matter must be accounted for in both climate effects and assessments of health impacts of atmospheric aerosols (18).
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Facts about "20121010105240"RDF feed
AbstractTropospheric aerosols are now clearly idenTropospheric aerosols are now clearly identified as one of the key "missing links"in many aspects of climate and radiative forcing processes, as well as in the health effects of air quality.This chapter examines some basic chemical and physical properties of aerosols that determine their diffusional growth, atmospheric removal by gravitational settling, and uptake of water leading to increased size and subsequent removal by both wet and dry deposition. The importance of aerosol size and chemical compositions in determining their atmospheric lifetimes is stressed, with particular attention to combustionderived carbonaceous soots. The atmospheric oxidation of "oily" soot surfaces to make these organic aerosols sufficiently hygroscopic for particle growth and atmospheric removal is expected to require a substantial time period. Mean residence times for submicron aerosols, ss determined by using natural radionuclides, support the observation that a significant fraction of fine aerosols (0.1-1 μm) have considerably longer atmospheric lifetimes than anticipated from normal washout and dry depositional processes of hygroscopic aerosols. It is concluded that the surface and chemical properties of aerosols and particulate matter must be accounted for in both climate effects and assessments of health impacts of atmospheric aerosols (18).alth impacts of atmospheric aerosols (18). +
Abstract URLhttp://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch014 +
AuthorsJeffrey S. Gaffney + and Nancy A. Marley +
BookUrban Aerosols and Their Impact: Lessons Learned from the World Trade Center Tradgedy +
Book Chapter14 +
Book End Page299 +
Book Start Page286 +
Doi10.1021/bk-2006-0919.ch014 +
Isbn0-8412-3916-9 +
Number of Pages14 +
Original URLhttp://pubs.acs.org/doi/abs/10.1021/bk-2006-0919.ch014 +
Publication Date1 January 2006 +
TitleThe Importance of the Chemical and Physical Properties of Aerosols in Determining Their Transport and Residence Times in the Troposphere +
Working URL

http://911datasets.org/images/ACS_919_Urban_Aerosols_and_Their_Impacts_2006.torrent

+
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