Search for dissertations about: "dual atmosphere"

Showing result 6 - 10 of 23 swedish dissertations containing the words dual atmosphere.

  2. 6. Stability, dual consistency and conservation of summation-by-parts formulations for multiphysics problems

    Author : Fatemeh Ghasemi Zinatabadi; Jan Nordström; Thomas Hagstrom; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, we consider the numerical solution of initial boundary value problems (IBVPs). Boundary and interface conditions are derived such that the IBVP under consideration is well-posed. We also study the dual problem and the related dual boundary/interface conditions. READ MORE

  4. 7. Sea Ice Concentration Estimation and Ice Type Classification from Dual-Frequency Satellite Synthetic Aperture Radar

    Author : Wiebke Aldenhoff; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; sea ice concentration; sea ice; SAR imaging; sea ice classification; Fram Strait;

    Abstract : The sea ice cover in the Arctic has undergone dramatic changes in recent years. The perennial sea ice extent is decreasing by 12.2 % per decade while annual mean sea ice thickness has decreased by more than 2 m for the central Arctic Basin from 1975 to 2012. READ MORE

  5. 8. Release to the Gas Phase of Potassium, Chlorine, and Sulfur from Biomass Fuels under Dual Fluidized Bed Gasification Conditions

    Author : Placid Tchoffor Atongka; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The transformation and release of ash-forming elements during the thermal conversion of biomass are conducive to ash-related problems, for example, agglomeration of the bed material in fluidized beds. The occurrence and severity of ash-related problems largely depend on the extents to which potassium (K), chlorine (Cl), and sulfur (S) are released from biomass fuels to the gas phase during thermal conversion processes. READ MORE

  6. 9. Isotopic and Molecular Characterization of Incomplete Combustion Products in sub-Saharan Africa

    Author : Leonard Kirago; Örjan Gustafsson; Samuel Gaita; Sophie Haslett; Antti Hyvärinen; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Air pollution; climate change; savanna; Nairobi; black carbon; Environmental Sciences; miljövetenskap;

    Abstract : Sub-Saharan Africa (SSA) is a global hotspot for incomplete combustion emissions from large-scale savanna fires, agricultural burning and growing city emissions. However, air pollution is understudied in the SSA region, resulting in a gap in the scientific understanding of regional emissions, source contributions, and impacts of air pollutants on regional climate and health. READ MORE

  7. 10. Forests and Greenhouse gases. Fluxes of CO2, CH4 and N2O from drained forests on organic soils

    Author : Karin von Arnold; Leif Klemedtsson; Mats Nilsson; Björn Hånell; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Greenhouse gases; GHG; fluxes of CO2; CH4; drained forests; organic soils; Skogsbotanik; miljöaspekter; växthusgaser; Water in nature and society; Vatten i natur och samhälle;

    Abstract : One of the largest environmental threats believed to be facing us today is global warming due to the accumulation of green house gases (GHG). The concentrations of GHG in the atmosphere are a result of the net strength of different sinks and sources. READ MORE