Sökning: "Weddell Sea"

Hittade 5 uppsatser innehållade orden Weddell Sea.

  1. 1. The atmospheric effects of Southern Ocean open-ocean polynyas onto the coastal polynyas from EC-Earth3

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Jakob Gunnarsson; [2023-05-10]
    Nyckelord :;

    Sammanfattning : Polynyas are recurring areas of open water or thin ice within the sea ice pack, which alter the local oceanatmosphere heat and moisture exchange. They are differentiated as coastal (latent heat) or open-ocean (sensible heat) polynya according to their formation process. 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. Invasive species in Weddell Sea : Effects on food web structure

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Inger-Marie Wohlfarth; [2020]
    Nyckelord :Centrality; Climate change; Food webs; Google PageRank; Invasive species; Structure; Weddell Sea;

    Sammanfattning : The cold water of Antarctica has a unique endemic fauna, where durophagous predators are rare or absent. Due to climate change the water is heating up and the predators have begun to return to the Southern Ocean, which could bring a lot of changes to the food web. There is a high risk it will lead to losses in the unique marine fauna of Antarctica. LÄS MER

  5. 4. Searching for atmospheric signals in states of low Antarctic sea ice concentration

    Master-uppsats, Stockholms universitet/Meteorologiska institutionen (MISU)

    Författare :Aiden Jönsson; [2018]
    Nyckelord :Sea ice; atmospheric circulation; Antarctic; polar; moisture transport;

    Sammanfattning : The Antarctic sea ice region is relatively stable in extent from year to year and sees little long-term variability, the primary driver for its seasonal advance and retreat being the seasonal changes in advection of heat through the atmosphere. However, observations show a slight positive trend in its extent over recent decades. LÄS MER

  7. 5. Termohalin cirkulation i Nordatlanten

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

    Författare :Katarina Hahn; [2004]
    Nyckelord :North Atlantic; thermohaline circulation; oceans; climate change; physical geography; cartography; pedology; geomorphology; climatology; geomorfologi; naturgeografi; marklära; kartografi; klimatologi; Earth and Environmental Sciences;

    Sammanfattning : Den termohalina cirkulationen är en global havscirkulation driven av densitetsskillnader, som gör att varmt vatten transporteras mot polerna och kallt vatten mot ekvatorn. Densiteten påverkas av temperatur och salinitet (och tryck, som vanligtvis ignoreras). Därför heter cirkulationen termohalin. LÄS MER