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15th CTWF International Symposium and Lecture Courses on Atmospheric Aerosol
aerosol Atmospheric aerosols climate
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2016/7/26
With the rapid pace of industrialization and urbanization comes a significant increase in atmospheric aerosol concentrations. Atmospheric aerosols produced by human activites and from natural processe...
Cloud condensation nuclei in pristine tropical rainforest air of Amazonia: size-resolved measurements and modeling of atmospheric aerosol composition and CCN activity
Cloud condensation nuclei pristine tropical rainforest air Amazonia atmospheric aerosol composition CCN activity
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2009/10/13
Atmospheric aerosol particles serving as cloud condensation nuclei (CCN) are key elements of the hydrological cycle and climate. We have measured and characterized CCN at water vapor supersaturations ...
Application of the variability-size relationship to atmospheric aerosol studies: estimating aerosol lifetimes and ages
variability-size relationship atmospheric aerosol estimating aerosol lifetimes ages
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2009/3/12
Aerosol variability is examined as function of particle size for data collected over the Northern Indian Ocean in February 1999 as part of the INDOEX experiment. It was found that for particles believ...
Mass closure on the chemical species in size-segregated atmospheric aerosol collected in an urban area of the Po Valley, Italy
Mass closure size-segregated atmospheric aerosol Po Valley Italy
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2009/3/10
A complete size segregated chemical characterisation was carried out for aerosol samples collected in the urban area of Bologna over a period of one year, using five-stage low pressure Berner impactor...
Nonlinear relationships between atmospheric aerosol and its gaseous precursors：Analysis of long-term air quality monitoring data by means of neural networks
Nonlinear relationships atmospheric aerosol gaseous precursors neural networks
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2009/3/10
The nonlinear features of the relationships between concentrations of aerosol and volatile organic compounds (VOC) and nitrogen oxides (NOx) in urban environments are revealed directly from data of lo...
Fluorescence from atmospheric aerosol detected by a lidar indicates biogenic particles in the lowermost stratosphere
Fluorescence atmospheric aerosol biogenic particles lowermost stratosphere
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2009/2/6
With a lidar system that was installed in Lindenberg/Germany, we observed in June 2003 an extended aerosol layer at 13km altitude in the lowermost stratosphere. This layer created an inelastic backsca...
Calibration of LACIS as a CCN detector and its use in measuring activation and hygroscopic growth of atmospheric aerosol particles
Calibration of LACIS CCN detector hygroscopic growth atmospheric aerosol particles
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2009/1/15
A calibration for LACIS (Leipzig Aerosol Cloud Interaction Simulator) for its use as a CCN (cloud condensation nuclei) detector has been developed. For this purpose, sodium chloride and ammonium sulfa...
A new inorganic atmospheric aerosol phase equilibrium model (UHAERO)
inorganic atmospheric aerosol phase equilibrium model UHAERO
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2009/1/5
A variety of thermodynamic models have been developed to predict inorganic gas-aerosol equilibrium. To achieve computational efficiency a number of the models rely on a priori specification of the pha...
A new atmospheric aerosol phase equilibrium model (UHAERO): organic systems
atmospheric aerosol phase equilibrium model UHAERO organic systems
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2008/12/18
In atmospheric aerosols, water and volatile inorganic and organic species are distributed between the gas and aerosol phases in accordance with thermodynamic equilibrium. Within an atmospheric partic...
Reformulating atmospheric aerosol thermodynamics and hygroscopic growth into fog, haze and clouds
atmospheric aerosol thermodynamics hygroscopic growth fog clouds
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2008/12/12
Modeling atmospheric aerosol and cloud microphysics is rather complex, even if chemical and thermodynamical equilibrium is assumed. We show, however, that the thermodynamics can be considerably simpli...
Modelling iodide – iodate speciation in atmospheric aerosol: Contributions of inorganic and organic iodine chemistry
iodate speciation atmospheric aerosol inorganic organic
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2008/12/3
The speciation of iodine in atmospheric aerosol is currently poorly understood. Models predict negligible iodide concentrations but accumulation of iodate in aerosol, both of which is not confirmed by...
Simplified representation of atmospheric aerosol size distributions using absolute principal component analysis
atmospheric aerosol size distributions principal component
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2008/12/1
Principal component analysis provides a fast and robust method to reduce the data dimensionality of an aerosol size distribution data set. Here we describe a methodology for applying principal compone...
Mode resolved density of atmospheric aerosol particles
density atmospheric aerosol particles
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2008/11/19
In this study, we investigate the mode resolved density of ultrafine atmospheric particles measured in boreal forest environment. The method used here enables us to find the distinct density informati...
Comparison of Two Approaches to Modeling Atmospheric Aerosol Particle Size Distributions
Particle size distribution Lognormal mixture Semiparametric modeling Nonparametric modeling Gnostic theory of uncertain data
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2016/3/29
This paper compares two approaches to modeling (smoothing) aerosol particle size distribution
(particle counts for specified diameter intervals): i) the semiparametric approach based on a maximum
li...