Sökning: "turbulent fluxes"

Visar resultat 1 - 5 av 21 uppsatser innehållade orden turbulent fluxes.

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. Flux Measurements at Lake Erken

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

   Författare :Christopher Greenland; [2021]
   Nyckelord :Turbulence; flux; exchange coefficients; UVCN-regime; COARE3.0 algorithm; variance;

   Sammanfattning : Turbulent fluxes govern the exchange of momentum, heat and moisture between the Earth’s surface and the overlying air. Computations of these fluxes are crucial, particularly over lakes and seas because most of the earth’s surface consists of water. LÄS MER

4. 3. Outdoor thermal comfort in Drottninghög, Helsingborg: a study on the effects of urban densification in a warmer climate

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

   Författare :Daniel Erlström; [2020]
   Nyckelord :Earth and Environmental Sciences;

   Sammanfattning : Extreme heat can lead to a significant increase in mortality, especially for urban citizens. Densification of urban areas can dramatically affect the local climate of the city by replacing green areas with impermeable materials and changing both radiative and turbulent fluxes. LÄS MER

5. 4. Energy balance closure, water balance, carbon exchange, and water use efficiency : observed and modeled outcomes for a managed, hemiboreal forest in Southern Sweden

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

   Författare :Linsey Marie Avila; [2019]
   Nyckelord :Energy balance; energy balance closure; energy balance ratio; net radiation; sensible heat; latent heat; turbulent fluxes; ground heat flux; energy storage; available energy; Bowen ratio; evaporative fraction; latent heat of vaporization; water balance; evapotranspiration; precipitation; water storage; water discharge; gross primary production; ecosystem respiration; net ecosystem production; carbon exchange; water use efficiency; Earth and Environmental Sciences;

   Sammanfattning : The claims for the potential of boreal and sub-boreal forests to combat negative effects of climate change have been substantial with over half of Earth’s primary forests found within boreal and temperate regions of the Northern Hemisphere. Given the likely occurrence of more extreme climate events in the future, ascertaining a better understanding of how climate effects, such as profound fluctuations in precipitation, decreases in yearly snow, faster snow melt rates, variability in evapotranspiration due to environmental stress, and related changes in the energy, hydrological, and carbon cycles will change these northern, boreal landscapes is crucial. LÄS MER

7. 5. CARBONDIOXIDE FLUXES FROM A CONTROLLED BOREAL RIVER

   Master-uppsats, Mittuniversitetet/Avdelningen för ekoteknik och hållbart byggande

   Författare :FRANK ARTHUR; [2018]
   Nyckelord :Carbon dioxide fluxes; Gas transfer Velocity; Turbulence; Eddy covariance; Stream flow; Wind speed; Global Carbon cycle; Latent and sensible heat fluxes.;

   Sammanfattning : River, lakes and   streams account for more carbon dioxide emissions than all other freshwater   reservoirs together. However, there is still lack of knowledge of the   physical processes that control the efficiency of the air-water exchange of   CO2 in these aquatic systems. LÄS MER