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Impact of deep convection in the tropical tropopause layer in West Africa: in-situ observations and mesoscale modelling
deep convection the tropical tropopause layer West Africa in-situ observations mesoscale modelling
2011/1/19
We present the analysis of the impact of convection on the composition of the tropical tropopause layer region (TTL) in West-Africa during the AMMA-SCOUT campaign. Geophysica M55 aircraft observations...
On average, airborne aerosol particles cool the Earth's surface directly by absorbing and scattering sunlight and indirectly by influencing cloud reflectivity, life time, thickness or extent. Here we ...
Second-generation products contribute substantially to the particle-phase organic material produced by β-caryophyllene ozonolysis
the particle-phase organic material β-caryophyllene ozonolysis
2011/1/19
The production of secondary organic aerosol (SOA) by the dark ozonolysis of gas-phase β-caryophyllene was studied. The experiments were conducted in a continuous-flow environmental chamber for organic...
The Chemistry of Atmosphere-Forest Exchange (CAFE) Model – Part 1: Model description and characterization
Atmosphere-Forest Exchange (CAFE) Model Model description and characterization
2011/1/19
We present the Chemistry of Atmosphere-Forest Exchange (CAFE) model, a vertically-resolved 1-D chemical transport model designed to probe the details of near-surface reactive gas exchange. CAFE integr...
SOSA – a new model to simulate the concentrations of organic vapours and sulphuric acid inside the ABL – Part 1: Model description and initial evaluation
SOSA organic vapours sulphuric acid the ABL initial evaluation
2011/1/18
Chemistry in the atmospheric boundary layer (ABL) is controlled by complex processes of surface fluxes, flow, turbulent transport, and chemical reactions. We present a new model SOSA (model to simulat...
Results from the University of Toronto continuous flow diffusion chamber at ICIS 2007: instrument intercomparison and ice onsets for different aerosol types
the University of Toronto flow diffusion chamber ICIS 2007 ice onsets different aerosol types
2011/1/18
The University of Toronto continuous flow diffusion chamber (UT-CFDC) was used to study heterogeneous ice nucleation at the International Workshop on Comparing Ice Nucleation Measuring Systems (ICIS 2...
Physico-chemical characterization of SOA derived from catechol and guaiacol – a model substance for the aromatic fraction of atmospheric HULIS
Physico-chemical characterization SOA catechol and guaiacol atmospheric HULIS
2011/1/18
Secondary organic aerosol (SOA) was produced from the aromatic precursors catechol and guaiacol by reaction with ozone in the presence and absence of simulated sunlight and humidity and investigated f...
Measurements of HONO during BAQS-Met
HONO BAQS-Met
2010/12/28
Measurements of nitrous acid (HONO) were performed as part of the 2007 Border Air Quality and Meteorology Study (BAQS-Met) at the Harrow, Ontario, Canada supersite between 20 June and 10 July 2007. Ni...
Physical properties of iodate solutions and the deliquescence of crystalline I2O5 and HIO3
iodate solutions crystalline I2O5 and HIO3
2010/12/28
Secondary aerosol produced from marine biogenic sources in algal-rich coastal locations will initially be composed of iodine oxide species, most likely I2O5, or its hydrated form HIO3, formed as a res...
Volatile organic compound emissions from Larrea tridentata (creosotebush)
Volatile organic compound Larrea tridentata
2010/12/28
We present results from the CREosote ATmosphere Interactions through Volatile Emissions (CREATIVE 2009) field study in southern Arizona aimed at quantifying emission rates of VOCs from creosotebush (L...
Comparison of global inventories of CO emissions from biomass burning derived from remotely sensed data
CO biomass burning remotely sensed data
2010/12/28
The objective is to highlight similarities and differences by focusing on the geographical and temporal distribution and on the emissions for three broad land cover classes (forest, savanna/grassland ...
Measurement of the ambient organic aerosol volatility distribution: application during the Finokalia Aerosol Measurement Experiment (FAME-2008)
the ambient organic aerosol volatility distribution the Finokalia Aerosol Measurement Experiment FAME-2008
2010/12/28
Spectrometer (AMS) and a Scanning Mobility Particle Sizer (SMPS) to measure the volatility distribution of aged organic aerosol in the Eastern Mediterranean during the Finokalia Aerosol Measurement Ex...
Attribution of stratospheric ozone trends to chemistry and transport: a modelling study
stratospheric ozone chemistry transport a modelling study
2010/12/28
The decrease of the concentration of ozone depleting substances (ODSs) in the stratosphere over the past decade raises the question to what extent observed changes in stratospheric ozone over this per...
Comparison between simulated and observed chemical composition of fine aerosols in Paris (France) during springtime: contribution of regional versus continental emissions
chemical composition fine aerosols springtime regional versus continental emissions
2010/12/28
Hourly concentrations of inorganic salts (ions) and carbonaceous material in fine aerosols (aerodynamic diameter, A.D. <2.5 μm) have been determined experimentally from fast measurements performed for...
Laboratory investigations of the impact of mineral dust aerosol on cold cloud formation
mineral dust aerosol cold cloud formation Laboratory
2010/12/28
Dust particles represent a dominant source of particulate matter (by mass) to the atmosphere, and their emission from some source regions has been shown to be transported on regional and hemispherical...