Sökning: "havsis"

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

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

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

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

    Sammanfattning : 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. LÄS MER

  3. 2. Methane Sulphonic Acid in East Antarctic Coastal Firn and Ice Cores and Its Relationship with Chlorophyll-a and Sea Ice Extent in the Southern Ocean

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Emma Nilsson; [2022]
    Nyckelord :methane sulphonic acid; firn cores; sea ice proxy; marine primary productivity; Fimbul Ice Shelf; Dronning Maud Land; metansulfonsyra; firnkärnor; havsis-proxy; marin primärproduktion; Fimbulisen; Dronning Maud Land;

    Sammanfattning : The seasonal retreat of sea ice in the austral spring and summer around Antarctica has a significant effect on phytoplankton activity, mainly due to light availability, meltwater input of dissolved iron, and surface water stratification. Phytoplankton produce dimethylsulfoniopropionate, the precursor to the climate-cooling gas dimethyl sulphide, which is ventilated to the atmosphere and oxidised to methane sulphonic acid (MSA). LÄS MER

  4. 3. Intercomparison of a Dynamic Ocean for Earth-like Aqua-planets

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Fredrik Plane; [2022]
    Nyckelord :Astrobiology; Planets; Aqua-planets; Atmosphere and Ocean physics; Exoplanet; Habitability; General Circulation Model; GCM; Climate Modelling; Dynamic Ocean;

    Sammanfattning : I present herein an ensemble of ROCKE-3D aqua-planet simulations which I compare with the simulations presented in the work of Yang et al. (2019) and other similar works. The focus was on contrasting differences in the greenhouse effect between the models. LÄS MER

  5. 4. Climate Simulations of an Exoplanet with a Slab Ocean: A 3D Model Intercomparison of various GCMs

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Moa Biserud; [2022]
    Nyckelord :Climate simulations; GCM; ROCKE-3D; Exoplanet; Slab Ocean; Qflux=0;

    Sammanfattning : Three-dimensional (3D) planetary general circulation models (GCMs) have been derived from global climate models used to project 21st century changes in Earth's climate. GCMs are used to address questions regarding the climate-and habitability aspects of terrestrial planets within the solar system and assess the habitability of planets outside of the solar system, so called exoplanets. LÄS MER

  7. 5. Drivved I Arktis : En dendrokronologisk sammanställning över teorier och förekomster

    Kandidat-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Nathalie Hallbäck; [2020]
    Nyckelord :;

    Sammanfattning : Klimatet på Arktis har förändrats genom Holocen. Under tidig holocen (10.4 år BP till 8.2 år BP)kännetecknas perioden med att glaciärerna började dra sig tillbaka och att klimatet blev varmare. LÄS MER