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Parameterization of the nitric acid effect on CCN activation
nitric acid effect CCN activation HNO3 and HCl concentrations
2009/2/8
In this paper we present a parameterization of the nitric acid effect on cloud droplet formation. The new parameterization is intended to be used in large scale models in order to obtain regional and ...
Cloud droplet activation and surface tension of mixtures of slightly soluble organics and inorganic salt
Cloud droplet activation slightly soluble organics inorganic salt
2009/2/6
Critical supersaturations for internally mixed particles of adipic acid, succinic acid and sodium chloride were determined experimentally for dry particles sizes in the range 40-130nm. Surface tension...
Extracting Spooky-activation-at-a-distance from Considerations of Entanglement
Spooky-activation-at-a-distance Considerations of Entanglement
2010/4/16
Following an early claim by Nelson & McEvoy \cite{Nelson:McEvoy:2007} suggesting that word associations can display `spooky action at a distance behaviour', a serious investigation of the potentially ...
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
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...
Importance of the organic aerosol fraction for modeling aerosol hygroscopic growth and activation: a case study in the Amazon Basin
organic aerosol fraction modeling aerosol hygroscopic growth Amazon Basin
2009/1/14
The aerosol in the Amazon basin is dominated throughout the year by organic matter, for the most part soluble in water. In this modeling study, we show how the knowledge of water-soluble organic compo...
The effect of physical and chemical aerosol properties on warm cloud droplet activation
effect of physical and chemical aerosol properties warm cloud droplet activation
2009/1/12
The effects of atmospheric aerosol on climate forcing may be very substantial but are quantified poorly at present; in particular, the effects of aerosols on cloud radiative properties, or the "indire...
Aerosol activation and cloud processing in the global aerosol-climate model ECHAM5-HAM
Aerosol activation cloud processing global aerosol-climate model
2009/1/12
A parameterization for cloud processing is presented that calculates activation of aerosol particles to cloud drops, cloud drop size, and pH-dependent aqueous phase sulfur chemistry. The parameterizat...
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01
unusual chlorine activation microwave spectroscopy late Arctic winter
2009/1/5
During the Arctic winter of 2000/01, ground-based FTIR and millimetre-wave measurements revealed significant amounts of ClO over Kiruna after the final warming in February 2001. In fact, column amoun...
Water activity and activation diameters from hygroscopicity data - Part II: Application to organic species
Water activity activation diameters hygroscopicity data organic species
2009/1/4
A method has been developed for using particle hygroscopicity measurements made with a humidified tandem differential mobility analyzer (HTDMA) to determine water activity as a function of solute wei...
Cluster activation theory as an explanation of the linear dependence between formation rate of 3nm particles and sulphuric acid concentration
Cluster activation theory linear dependence formation rate of 3nm particles sulphuric acid concentration
2009/1/4
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the critical...
The effect of H2O adsorption on cloud drop activation of insoluble particles: a theoretical framework
H2O adsorption cloud drop activation insoluble particles theoretical framework
2008/12/29
Cloud droplet activation of wettable insoluble compounds has been studied theoretically by assuming that droplet growth happens through multilayer adsorption. The idea is to include an adsorption isot...
Inferring thermodynamic properties from CCN activation experiments: single-component and binary aerosols
thermodynamic property CCN single-component binary aerosol
2008/12/22
This study presents a new method, Köhler Theory Analysis (KTA), to infer the molar volume and solubility of organic aerosol constituents. The method is based on measurements of surface tension, c...
Surface tensions of multi-component mixed inorganic/organic aqueous systems of atmospheric significance: measurements, model predictions and importance for cloud activation predictions
Surface tensions model predictions cloud activation predictions
2008/12/9
In order to predict the physical properties of aerosol particles, it is necessary to adequately capture the behaviour of the ubiquitous complex organic components. One of the key properties which may ...
Ternary solution of sodium chloride, succinic acid and water; surface tension and its influence on cloud droplet activation
sodium chloride succinic acid cloud droplet activation
2008/11/14
Surface tension of ternary solution of sodium chloride, succinic acid and water was measured as a function of both composition and temperature by using the capillary rise technique. Both sodium chlori...
CCN activation experiments with adipic acid: effect of particle phase and adipic acid coatings on soluble and insoluble particles
CCN adipic acid soluble and insoluble particles
2008/11/13
Slightly soluble atmospherically relevant organic compounds may influence particle CCN activity and therefore cloud formation. Adipic acid is a frequently employed surrogate for such slightly soluble ...