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Release of mercury halides from KCl denuders in the presence of ozone
mercury halides KCl denuders the presence of ozone
2010/9/14
KCl-coated denuders have become a standard method for measurement of gaseous oxidized mercury, but their performance has not been exhaustively evaluated, especially in field conditions. In this study,...
Enhancing effect of dimethylamine in sulfuric acid nucleation in the presence of water – a computational study
dimethylamine sulfuric acid nucleation the presence of water
2010/8/13
We have studied the hydration of sulfuric acid – ammonia and sulfuric acid – dimethylamine clusters using quantum chemistry. We calculated the formation energies and thermodynamics for clusters of one...
Heterogeneous ozonation kinetics of 4-phenoxyphenol in the presence of photosensitizer
Heterogeneous ozonation kinetics 4-phenoxyphenol photosensitizer
2010/2/21
At the mixing ratio of 60 ppb which corresponds to strongly polluted ozone areas, the first order of decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At a very high ozone mixing ratio of 6 pp...
Technical Note: Measurement of the tropical UTLS composition in presence of clouds using millimetre-wave heterodyne spectroscopy
tropical UTLS composition clouds millimetre-wave heterodyne spectroscopy
2009/3/13
The MARSCHALS (Millimetre-wave Airborne Receiver for Spectroscopic CHaracterisation of Atmospheric Limb-Sounding) project has the general objectives of demonstrating the measurement capabilities of a ...
Köhler theory for a polydisperse droplet population in the presence of a soluble trace gas, and an application to stratospheric STS droplet growth
Kö hler theory polydisperse droplet population soluble trace gas stratospheric STS droplet
2009/3/11
We consider the equilibrium behavior of a polydisperse aqueous droplet population as a function of relative humidity (RH) when a soluble trace gas, such as nitric acid, is present in the system. The d...
The rate of water vapor evaporation from ice substrates in the presence of HCl and HBr: implications for the lifetime of atmospheric ice particles
water vapor evaporation ice substrates HCl HBr atmospheric ice particles
2009/3/11
Using a multidiagnostic approach the rate Rev [ molec cm-3 s-1] or flux Jev [ molec cm-2 s-1] of evaporation of H2O and its corresponding rate constant for condensation, kcond [s-1 ], on a 1 µm ...
Optimizing CO2 observing networks in the presence of model error: results from TransCom 3
Optimizing CO2 observing networks presence of model error TransCom 3
2009/2/23
We use a genetic algorithm to construct optimal observing networks of atmospheric concentration for inverse determination of net sources. Optimal networks are those that produce a minimum in average p...
A method for detecting the presence of organic fraction in nucleation mode sized particles
organic fraction nucleation mode sized particles
2009/2/19
New particle formation and growth has a very important role in many climate processes. However, the overall knowlegde of the chemical composition of atmospheric nucleation mode (particle diameter, d<2...
Modelling of nitrate and ammonium-containing aerosols in presence of sea salt
nitrate ammonium-containing aerosols sea salt
2009/1/16
A thermodynamical model for treatment of gas/aerosol partitioning of semi volatile inorganic aerosols has been implemented in a global chemistry and aerosol transport model (Oslo CTM2). The sulphur cy...