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Air pollution studies in terms of PM2.5, PM2.5-10, PM10, lead and black carbon in urban areas of Antananarivo - Madagascar
Air pollution studies terms of PM2.5 black carbon urban areas of Antananarivo Madagascar Atmospheric and Oceanic Physics
2012/4/20
Atmospheric aerosols or particulate matters are chemically complex and dynamic mixtures of solid and liquid particles. Sources of particulate matters include both natural and anthropogenic processes. ...
A critical look at spatial scale choices in satellite-based aerosol indirect effect studies
spatial scale choices satellite-based aerosol indirect effect studies
2010/12/20
Analysing satellite datasets over large regions may introduce spurious relationships between aerosol and cloud properties due to spatial variations in aerosol type, cloud regime and synoptic regime cl...
Geoengineering by stratospheric SO2 injection: results from the Met Office HadGEM2 climate model and comparison with the Goddard Institute for Space Studies ModelE
stratospheric SO2 injection the Met Office HadGEM2 climate model the Goddard Institute Space Studies ModelE
2010/8/16
We examine the response of the Met Office Hadley Centre's HadGEM2-AO climate model to simulated geoengineering by continuous injection of SO2 into the lower stratosphere, and compare the results with ...
Parametric studies of contrail ice particle formation in jet regime using microphysical parcel modeling
contrail ice particle formation jet regime microphysical parcel modeling
2010/8/12
Condensation trails (contrails) formed from water vapor emissions behind aircraft engines are the most uncertain components of the aviation impacts on climate change. To gain improved knowledge of con...
Urban Aerosol Studies of PM1 Size Fraction with Reference to Ambient Conditions and Visibility
PM1 Urban aerosol Size distribution Aerosol extinction coefficient Nanoparticles
2016/3/29
Mass measurement of ambient PM10 and PM2.5 size fractions is a rather well established technique. However there is a
broad consensus in the scientific community about the importance of smaller partic...
Lidar characterization of the Arctic atmosphere during ASTAR 2007: four cases studies of boundary layer, mixed-phase and multi-layer clouds
Lidar characterization the Arctic atmosphere ASTAR 2007 boundary layer mixed-phase multi-layer clouds
2010/8/12
During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR), which was conducted in Svalbard in March and April 2007, tropospheric Arctic clouds were observed with two ground-based b...
Modeling of Saharan dust outbreaks over the Mediterranean by RegCM3: case studies
Saharan dust outbreaks Mediterranean RegCM3 case studies
2010/1/18
The regional climate model RegCM3 coupled with a radiatively active aerosol model with online feedback is used to investigate direct and semi-direct radiative aerosol effects over the Sahara and Europ...
Sensitivity studies of different aerosol indirect effects in mixed-phase clouds
different aerosol indirect effects mixed-phase clouds
2009/12/3
Aerosols affect the climate system by changing cloud characteristics. Using the global climate model ECHAM5-HAM, we investigate different aerosol effects on mixed-phase clouds: The glaciation effect, ...
A new transport mechanism of biomass burning from Indochina as identified by modeling studies
transport mechanism biomass burning Indochina modeling studies
2009/11/9
Biomass burning in the Indochina Peninsula (Indochina) is one of the important ozone sources in the low troposphere over East Asia in springtime. Moderate Resolution Imaging Spectroradiometer (MODIS) ...
Performance of the line-by-line radiative transfer model (LBLRTM) for temperature and species retrievals: IASI case studies from JAIVEx
line-by-line radiative transfer model LBLRTM IASI case JAIVEx
2009/10/9
Presented here are comparisons between the Infrared Atmospheric Sounding instrument (IASI) and the "Line-By-Line Radiative Transfer Model" (LBLRTM). Spectral residuals from radiance closure studies du...
Chemically-resolved aerosol volatility measurements from two megacity field studies
Chemically-resolved aerosol volatility measurements megacity field
2009/10/9
The volatilities of different chemical species in ambient aerosols are important but remain poorly characterized. The coupling of a recently developed rapid temperature-stepping thermodenuder (TD, ope...
Studies of heterogeneous freezing by three different desert dust samples
heterogeneous freezing desert dust samples
2009/5/6
We present results of experiments at the aerosol interactions and dynamics in the atmosphere (AIDA) chamber facility looking at the freezing of water by three different types of mineral particles at t...
Laboratory studies of ice formation pathways from ammonium sulfate particles
ice formation pathways ammonium sulfate particles
2009/3/13
Cirrus clouds are composed of ice particles and their formation pathways have been studied extensively in the laboratory. The ability of ammonium sulfate particles to act as nuclei for cirrus clouds h...
An analytical inversion method for determining regional and global emissions of greenhouse gases: Sensitivity studies and application to halocarbons
analytical inversion method determining regional and global emissions greenhouse gases halocarbons
2009/3/13
A new analytical inversion method has been developed to determine the regional and global emissions of long-lived atmospheric trace gases. It exploits in situ measurement data from three global networ...
New particle formation during a- and b-pinene oxidation by O3, OH and NO3, and the influence of water vapour: particle size distribution studies
a- and b-pinene oxidation O3 OH NO3 water vapour particle size distribution
2009/3/12
New particle formation during the oxidation of a- and b-pinene (C10H16) by ozone, OH and NO3 was studied by measuring the particle size distributions with a scanning mobility particle sizer (TSI 3936)...