Sökning: "troposfären"

Visar resultat 1 - 5 av 18 uppsatser innehållade ordet troposfären.

  1. 1. Evaporation Duct Modelling for a Wave-Propagation Simulator

    Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Oscar Eklund; [2022]
    Nyckelord :evaporation; duct; height; monin; obukhov; mos; surface; layer; ssft; byc; pj; businger; dyer; beljaars; holtslag; cheng; brutsaert; sheba;

    Sammanfattning : Long-range communication proves to be a challenge due to the Earth’s curvature, since electromagnetic waves propagate away from the Earth’s surface in a free atmosphere. A possible solution to beyond line-of-sight communication is the atmospheric phenomenon known as the evaporation duct. LÄS MER

  3. 2. Molnens påverkan på jordens strålningsbalans och klimatsystem

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Hans Jägfeldt; [2022]
    Nyckelord :moln; kondensation; aerosol; strålningsbalans; klimat; klimatsystem; kosmisk strålning; troposfären; Earth and Environmental Sciences;

    Sammanfattning : The role of clouds in the climate system has been studied and their impact on the Sun's impact on the Earth's energy balance. The Earth's albedo affects the energy balance by influencing how much of the Sun’s radiation is reflected or absorbed. Clouds affect the Earth's albedo and therefore play an important role in this balance. LÄS MER

  4. 3. Analysis of High and Low Rossby Wave Phase Speed Events Over Northern Mid-Latitudes

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Emma Rosengren; [2022]
    Nyckelord :Rossby waves; phase speed; atmospheric blocking; storm track; windstorms; Rossbyvågor; fashastighet; atmosfärisk blockering; lågtrycksbana; vindstormar;

    Sammanfattning : The large-scale, mid-latitude circulation in the upper troposphere is dominated by Rossby waves. The jet stream flows along the wave structure and surface cyclones can be found ahead of the troughs of the waves, propagating eastward. LÄS MER

  5. 4. Investigation of Emission Source Heights in FLEXPART 10.02 for the Wildfire in Pedrógão Grande, Portugal, 2017

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Anton Nygren; [2019]
    Nyckelord :wildfire; Pedrógão Grande; structural similarity; SSIM; FLEXPART; MERRA2; CO; emission source height; skogsbränder; Pedrógão Grande; strukturell likhet; SSIM; FLEXPART; MERRA2; CO; utsläppshöjd;

    Sammanfattning : One of the worst wildfires in Portugal in 2017 on June17- 21 started at the central part of Pedrógão Grande and spread fast to the surrounding areas Góis, Pampilhosa da Serra and Arganil. The wildfire took 64 lives and a large smoke plume was observed. LÄS MER

  7. 5. Global scale patterns and trends in tropospheric NO2 concentrations

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Daniel Klingmyr; [2019]
    Nyckelord :Geography; Geographical Information Systems; GIS; Nitrogen dioxide; NO2; Remote sensing; OMI; Spatial patterns; Temporal trends; DBEST; Polytrend; Earth and Environmental Sciences;

    Sammanfattning : Nitrogen dioxide (NO2) is an important air pollutant with both environmental and epidemiological effects. The main aim of this thesis is to explore spatial patterns and temporal trends of tropospheric NO2 concentrations globally using data from the OMI instrument aboard NASA’s Aura spacecraft. LÄS MER