Search for dissertations about: "Secondary organic aerosols"

Showing result 6 - 10 of 16 swedish dissertations containing the words Secondary organic aerosols.

2. 6. Dual isotope (13C-14C) Studies of Water-Soluble Organic Carbon (WSOC) Aerosols in South and East Asia

   Author : Elena N. Kirillova; Örjan Gustafsson; Maria Cristina Facchini; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; atmospheric aerosols; water-soluble organic carbon; carbon isotopes; South Asia; East Asia; source apportionment; aerosol aging; Applied Environmental Science; tillämpad miljövetenskap;

   Abstract : Atmospheric aerosols may be emitted directly as particles (primary) or formed from gaseous precursors (secondary) from different natural and anthropogenic sources. The highly populated South and East Asia regions are currently in a phase of rapid economic growth to which high emissions of carbonaceous aerosols are coupled. READ MORE

4. 7. Primary and secondary organics in biogenic atmospheric aerosol : The chiral study of 2-methyltetrols from method development to application

   Author : Nélida Jocelyn Donají Karlsson; Kevin Noone; Sandro Fuzzi; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; atmospheric organic aerosols; 2-methyltetrols; isoprene; chiral GC-MS; enantiomeric composition; Applied Environmental Science; tillämpad miljövetenskap;

   Abstract : Distinguishing between the primary and secondary origin of the organic components in atmospheric aerosols is one of the key parameters in assessing the relevance and role of different chemical species in the overall chemistry of the atmosphere. Currently available methods used in field measurements are not able to fully discriminate between the primary or secondary origin of compounds detected in atmospheric aerosols. READ MORE

5. 8. Modeling of new particle formation and growth in the atmospheric boundary layer

   Author : Emilie Öström; Centrum för miljö- och klimatvetenskap (CEC); []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; New particle formation; Secondary organic aerosols; Process-based modeling; Climate;

   Abstract : Atmospheric aerosols affect climate, but to what degree still remains one of the largest uncertainties in global climate models. To improve the representation of aerosols in future climate models we need a greater understanding of aerosol processes. READ MORE

6. 9. Extraction and Chromatography of targeted emission markers in atmospheric aerosols

   Author : Hafiz Abdul Azeem; Centrum för analys och syntes; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; atmospheric aerosols; emission markers; mass spectrometry; supercritical CO2; trace analysis;

   Abstract : Atmospheric aerosols are a highly complex and dynamic mixture of solid particles, liquid deplots and gases. They travel across the continents and affect global climate and human health in various ways, often negatively. One important aspect of research in atmospheric aerosols is the investigation of emissions to the atmosphere from various sources. READ MORE

7. 10. Submicrometre aerosol emissions from sea spray and road traffic

   Author : Monica Mårtensson; Douglas Nilsson; Christer Johansson; Michael Smith; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eddy covariance method; aerosol emissions; submicrometre sea salt parameterisation; primary marine organic aerosols; sea spray; road traffic emission factors; air-sea exchange; aerosol dynamics model; internal aerosol mixing; combustion aerosols; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap; atmosfärvetenskap; Atmospheric Sciences;

   Abstract : The uncertainty of the climate and health effects of aerosols is still large, one important reason being lack of knowledge of the primary emissions. This thesis combines laboratory and field experiments, and process modelling in an effort to better quantify the submicrometre aerosol emissions and to understand some of the processes in the atmosphere. READ MORE