Essays about: "Low-level jets"

Found 5 essays containing the words Low-level jets.

  1. 1. Insights Into Wind Profile Characteristics in the Arctic Marine Boundary Layer

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Charlotte Sophie Gausa; [2024]
    Keywords : Arctic; wind profile power law; MOST; boundary layer; low level jets; sea ice; vindprofil; Arktis; gränsskikt; vindenergi; låghöjdsvindar; havsis;

    Abstract : The atmospheric boundary layer in the Arctic is essential for the understanding of climate change and improving regional weather prediction. The aim of this study is to investigate to which degree wind speed profiles retrieved in the Arctic agree with well known wind profile concepts and understand which local impact factors influence the wind speed profile. READ MORE

  3. 2. Turbulence Intensity During Low-Level Jets in the Baltic Sea

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Thomasson August; [2021]
    Keywords : Low-Level Jet; Turbulence intensity; Shear sheltering; LiDAR; Baltic Sea; Low-Level Jet; Turbulensintesitet; Shear sheltering; LiDAR; Östersjön;

    Abstract : Low-level jets (LLJs) are local wind speed maximums in the atmospheric boundary layer. In the Baltic Sea, LLJs are frequently occurring in spring and summer. It is an important phenomena to consider for wind energy parks, and changes in turbulence during the jets can effect the efficiency of said parks. READ MORE

  4. 3. Characterisation of Low-Level Jets and their Influence on Low-Level Clouds over the Baltic Sea; Östergarnsholm Observatory, Sweden

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Author : Johan Lundberg; [2021]
    Keywords : Low-level jets; Low-level clouds; LLJs; LLCs; Boundary layer; ABL; CBH; Lidar; Ceilometer; Turbulent intensity; Physics and Astronomy;

    Abstract : In this study, about two years of data from Östergarnsholm in the Baltic Sea are used to analyse offshore low-level clouds (LLCs) influenced by low-level jets (LLJs) in the marine atmospheric boundary layer. The LLJs are passages of strong horizontal winds near the surface and are measured using a Doppler LiDAR, which provides information about the wind speed and wind direction up to 300 meters. READ MORE

  5. 4. Nocturnal jets in Skåne: an analysis of data from Hyltemossa research tower

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Author : Tove Fast; [2019]
    Keywords : Physics and Astronomy;

    Abstract : A nocturnal jet is a low level air jet that is often seen at an altitude below 500 m during night time conditions. It can reach wind speeds of storm force and is thus of importance for aviation and also for transport of e.g. moisture and pollutants in the lower troposphere. READ MORE

  6. 5. An investigation of the surface fluxes and other parameters in the regional climate model RCA1 during ice conditions

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Camilla Tisell; [2004]
    Keywords : RCA; ERA-40; surface fluxes; Baltic Sea;

    Abstract : In this study data from the regional climate model RCA1 is compared to measured data to investigate how good the model is during ice conditions and mainly how well the turbulent surface fluxes are described by the model. Comparisons of the sensible heat flux and the momentum flux as well as mean parameters are included. READ MORE