Search for dissertations about: "meteorologi"

Showing result 1 - 5 of 210 swedish dissertations containing the word meteorologi.

  1. 1. Large Eddy Simulation of Non-Local Turbulence and Integral Measures of Atmospheric Boundary Layers

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Igor Esau; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Planetary boundary layers; large eddy simulations; non-local turbulence; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; Meteorology; meteorologi;

    Abstract : A new large eddy simulation (LES) code is developed and used to investigate non-local features of turbulent planetary boundary layers (PBLs). The LES code is based on filtered Navier-Stokes equations, which describe motions of incompressible, Boussinesq fluid at high Reynolds numbers. READ MORE

  2. 2. Influence of External Factors on the Turbulence Structure in the Atmospheric Boundary Layer

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Cecilia Johansson; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; Meteorology; meteorologi;

    Abstract : The theory used in today’s weather- and climate models to describe processes near the earth’s surface, i.e. transport of heat, moisture and momentum between the ground and the atmosphere, is based on the idea that only local factors are important, such as temperature and wind speed near the ground. READ MORE

  3. 3. Mesoscale Simulations of Atmospheric Flow in Complex Terrain

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Matthias Mohr; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Mesoscale modeling; Flow in complex terrain; Atmospheric dispersion; Model comparison; Boundary conditions; Numerical modeling; Atmospheric pressure; Gravity waves; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; Meteorology; meteorologi;

    Abstract : The MIUU mesoscale model was further developed, in order to include information on large-scale atmospheric fields from global or regional atmospheric climate- and weather-prediction models. For this purpose, a new lateral boundary condition was developed and implemented into the model. READ MORE

  4. 4. Impact of Rossby waves on ozone distribution and dynamics of the stratosphere and troposphere

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Grigory Nikulin; Umeå universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; ozone; wave activity; trends; Brewer-Dobson circulation; Rossby waves; Arctic Oscillation; low ozone events; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; meteorologi; Meteorology;

    Abstract : Several physical mechanisms concerning the impact of Rossby waves on ozone distribution and circulation in the stratosphere and troposphere are studied in the thesis.Summertime total ozone variability over Middle Asia and Northern Scandinavia shows similar wave-like behaviour with typical periods of 10-20 days and amplitudes of 20-50 Dobson units. READ MORE

  5. 5. Uncertainties and variability in the global carbon cycle

    University dissertation from Stockholm : Stockholm University

    Author : Stephens Craig; Stockholms universitet.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; meteorologi; Meteorology;

    Abstract : Anthropogenic emissions of carbon dioxide (CO2) are perturbing the radiation balance of the atmosphere that ultimately determines the climate for all life on Earth. The prediction of future climate change and the explanation of observed changes are contingent on us quantitatively understanding the link between CO2 emissions and atmospheric concentrations that is provided by the biogeochemical carbon cycle. READ MORE