Aerosol Composition
Comparison of advanced offline and in situ techniques of organic aerosol composition measurement during the CalNex campaign
... aerosol composition. We present speciated measurements of organic aerosol composition by two methods: in situ thermal- desorption proton-transfer-reaction mass spectrometry (TD- PTR-MS) and ...
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ORACLE (v1.0): module to simulate the organic aerosol composition and evolution in the atmosphere
... organic aerosol composition and evolution in the atmosphere (ORACLE) has been devel- oped and implemented in the ECHAM/MESSy Atmospheric Chemistry (EMAC) model (Jöckel et ...and composition, improve ...
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Studies of Aerosol Composition and Hygroscopicity
... and aerosol-phase composition for regimes I, II, and III, ...aged aerosol in the background Los Angeles air, as proposed by Blumenthal et ...and aerosol-phase composition is expected to ...
342
Secondary Organic Aerosol Composition Studies Using Mass Spectrometry
... mode aerosol (rather than fine mode), and their loadings appear to be associated with signif- icant marine layer influence in the Los Angeles Basin ...mode aerosol and may be associated with marine ...
402
Mass Spectrometric Analysis of Organic Aerosol Composition: Laboratory and Ambient
... Organic matter is ubiquitous in atmospheric aerosols and ac- counts for a major fraction of particulate matter mass (Zhang et al., 2007a). Most particulate organic matter (POM) is sec- ondary in origin, comprising ...
203
Aerosol composition and hygroscopicity studies : instrument development/characterization, ambient and laboratory measurements, and modeling
... The TO flight tracks for all twelve flights between 1 and 21 August 2004 are shown in Figure 4.1. Several flights focused on areas downwind of the Monroe Power Plant (Monroe County, Michigan) and the Conesville Power ...
546
Aerosol composition and sources during high and low pollution periods in Ningbo, China
... Mechanism for the formation and microphysical characteristics of submicron aerosol during heavy haze pollution episode in the Yangtze River Delta, China.. Long term observations of PM2.5[r] ...
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Studies of Ambient and Chamber Aerosol Composition Using the Aerosol Mass Spectrometer
... (CToF) aerosol mass spectrometer (herein referred to as AMS) measured aerosol chemical composition in a repeating cycle for 4 out of ev- ery 12 s during flight, including within the smoke ...our ...
468
Development of an online radiative module for the computation of aerosol optical properties in 3-D atmospheric models: validation during the EUCAARI campaign
... the aerosol particles’ size distribution, chem- ical composition, optical properties, and impacts on radia- tive forcing is therefore a major objective in the understand- ing and quantification of the ...
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Determination of the Effects of Kelvin Radii and Bulk hygroscopicity on Atmospheric Aerosols Using MVN mix Ratios
... atmospheric aerosol and investigate how both Kelvin effect and Water activities affect atmospheric processes based on (MVN mix ...ten aerosol models (Arctic, Antarctic, Continental clean, continental ...
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Analysis of the Chemical Composition of Atmospheric and Chamber Generated Aerosol Using Mass Spectrometry
... and aerosol composition is critically important for all of these ...impacts. Composition is relevant to human health because the chemistry of a particle determines its ...because composition ...
378
Exploring the applicability and limitations of selected optical scattering instruments for PM mass measurement
... test aerosol in the laboratory, and (2) sampling ambient ...(size, composition, con- centration) were compared with responses from reference ...to aerosol size and ...between aerosol mass ...
11
Inter-comparison of laboratory smog chamber and flow reactor systems on organic aerosol yield and composition
... Bulk aerosol composition was influenced by the chemical transformations of the reactants in each device as well as by the ratio of primary to secondary ...the composition, the primary organic ...
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External and internal cloud condensation nuclei (CCN) mixtures: controlled laboratory studies of varying mixing states
... In this work, we seek to improve the experimental CCN activation analysis techniques of complex mixtures by inves- tigating the influence of mixing state on activation curves with known aerosol composition. ...
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Characterization of a thermodenuder-particle beam mass spectrometer system for the study of organic aerosol volatility and composition
... of aerosol components can probably be estimated to within about one order of magnitude, which is accurate enough to be of considerable use in aerosol volatility studies, and is a vast improvement over the ...
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Scanning supersaturation condensation particle counter applied as a nano-CCN counter for size-resolved analysis of the hygroscopicity and chemical composition of nanoparticles
... of aerosol particles to serve as cloud condensa- tion nuclei (CCN), ...atmospheric aerosol particle hygroscopicity and CCN activity are closely correlated with particle composition ex- pressed as ...
12
Design of a new multi-phase experimental simulation chamber for atmospheric photosmog, aerosol and cloud chemistry research
... and aerosol re- ...in aerosol global cycle by wet scavenging processes which de- pend on large-scale features such as cloud formation, con- version of clouds into rain drops, sedimentation and evap- oration ...
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Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: a study on freshly formed and aged biogenic SOA
... utilize the concept of particle collection on an impaction sur- face by means of humidification and inertial impaction, fol- lowed by desorption. TAG and TD provide hourly time res- olution measurements, and when ...
20
Laboratory and field evaluation of the Aerosol Dynamics Inc. concentrator (ADIc) for aerosol mass spectrometry
... using aerosol mass ...the Aerosol Mass Spectrometer (AMS) showed no shift in the particle size with the ADIc, as measured by the AMS particle time-of-flight ...
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Influence of aerosol chemical composition on N2O5 uptake: airborne regional measurements in northwestern Europe
... Aerosol number-size distributions were measured by an inboard Scanning Mobility Particle Sizer (SMPS, Wang and Flagan, 1990) and a wing-mounted Particle Measurement Systems (PMS) Passive Cavity Aerosol ...
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