Key factors influencing the relative humidity dependence of aerosol light scattering

被引:47
作者
Baynard, T
Garland, RM
Ravishankara, AR
Tolbert, MA
Lovejoy, ER
机构
[1] NOAA, Earth Syst Res Lab, Div Chem Sci, Boulder, CO 80305 USA
[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA
关键词
D O I
10.1029/2005GL024898
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We have measured the relative humidity dependence of aerosol light extinction (f(sigma(ep))(80% RH, Dry)) at 532 nm for non-absorbing surrogate atmospheric aerosols to determine the influence of particle size, composition ( inorganic vs. organic), and mixing state ( internal vs. external) on aerosol light scattering. We present results for mixtures of NaCl and (NH4)(2)SO4 with a few dicarboxylic acids. For atmospheric conditions the variability in the RH dependence of aerosol light scattering (f(sigma(sp))(RH, Dry)) is most sensitive to aerosol composition and size. The influence of the mixing state on fs( sp)( RH, Dry) is small. These laboratory results imply that fs( sp)( RH, Dry) can be reasonably estimated from the aerosol size distribution and composition (inorganic/ organic) using the mass-weighted average of f(sigma(sp))(RH, Dry) for the individual components.
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页数:4
相关论文
共 24 条
[1]  
Bohren C., 1983, ABSORPTION SCATTERIN
[2]  
Born M., 1975, Principle of optics
[3]   Water uptake by particles containing humic materials and mixtures of humic materials with ammonium sulfate [J].
Brooks, SD ;
DeMott, PJ ;
Kreidenweis, SM .
ATMOSPHERIC ENVIRONMENT, 2004, 38 (13) :1859-1868
[4]   Mixtures of pollution, dust, sea salt, and volcanic aerosol during ACE-Asia: Radiative properties as a function of relative humidity [J].
Carrico, CM ;
Kus, P ;
Rood, MJ ;
Quinn, PK ;
Bates, TS .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003, 108 (D23)
[5]   NaCl aerosol particle hygroscopicity dependence on mixing with organic compounds [J].
Hansson, HC ;
Rood, MJ ;
Koloutsou-Vakakis, S ;
Hämeri, K ;
Orsini, D ;
Wiedensohler, A .
JOURNAL OF ATMOSPHERIC CHEMISTRY, 1998, 31 (03) :321-346
[6]   Organic aerosol and global climate modelling: a review [J].
Kanakidou, M ;
Seinfeld, JH ;
Pandis, SN ;
Barnes, I ;
Dentener, FJ ;
Facchini, MC ;
Van Dingenen, R ;
Ervens, B ;
Nenes, A ;
Nielsen, CJ ;
Swietlicki, E ;
Putaud, JP ;
Balkanski, Y ;
Fuzzi, S ;
Horth, J ;
Moortgat, GK ;
Winterhalter, R ;
Myhre, CEL ;
Tsigaridis, K ;
Vignati, E ;
Stephanou, EG ;
Wilson, J .
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2005, 5 :1053-1123
[7]   Hygroscopic properties of an organic-laden aerosol [J].
Malm, WC ;
Day, DE ;
Kreidenweis, SM ;
Collett, JL ;
Carrico, C ;
McMeeking, G ;
Lee, T .
ATMOSPHERIC ENVIRONMENT, 2005, 39 (27) :4969-4982
[8]   The effects of models of aerosol hygroscopicity on the apportionment of extinction [J].
Malm, WC ;
Kreidenweis, SM .
ATMOSPHERIC ENVIRONMENT, 1997, 31 (13) :1965-1976
[9]   Light scattering characteristics of aerosols as a function of relative humidity: Part I - A comparison of measured scattering and aerosol concentrations using the theoretical models [J].
Malm, WC ;
Day, DE ;
Kreidenweis, SM .
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 2000, 50 (05) :686-700
[10]   Apportionment of light scattering and hygroscopic growth to aerosol composition [J].
McInnes, L ;
Bergin, M ;
Ogren, J ;
Schwartz, S .
GEOPHYSICAL RESEARCH LETTERS, 1998, 25 (04) :513-516