Essays about: "alaska"

Showing result 1 - 5 of 24 essays containing the word alaska.

  1. 1. Co-occurring Cold Extremes in North America and Unusually Warm Weather in Europe

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

    Author : Petros Stergiou; [2023]
    Keywords : Extreme temperature events co-occurrence; cold spells; warm extremes; Europe; North America; Pan-Atlantic atmospheric teleconnections; Samtidiga extrema temperaturhändelser; kalla extrema; varma extrema; Europa; Nordamerika; Pan-Atlantiska atmosfäriska telekopplingar;

    Abstract : In this project, we identified and examined the 50 coldest extreme temperature eventsin North America (CENA) and the 50 warmest extreme temperature events insouthwestern Europe (WEEU) during the winter seasons from 1948 to 2023. For theanalysis, we utilized daily NCEP-NCAR reanalysis data for temperature, sea levelpressure (SLP), and 500hPa geopotential height (Z500). READ MORE

  3. 2. Hg concentration in humus soils in different Arctic and Subarctic tundra vegetation types : Including a method comparison for analyzing metals in humus soils

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Alice Sandvärn; [2022]
    Keywords : Hg concentration; vegetation types; Arctic tundra; elevation gradient; XRF;

    Abstract : Heavy metals, such as mercury (Hg), have a long residence time in the atmosphere and can be transported long distances and deposited in the Arctic via wet and dry deposition. Still, there are few studies on the complex mercury cycle and how different plant groups absorb Hg. READ MORE

  4. 3. Hg concentration in humus soils in different Arctic and Subarctic tundra vegetation types : Including a method comparison for analyzing metals in humus soils

    University essay from

    Author : Alice Sandvärn; [2022]
    Keywords : Hg concentration; vegetation types; Arctic tundra; elevation gradient; XRF;

    Abstract : Heavy metals, such as mercury (Hg), have a long residence time in the atmosphere and can be transported long distances and deposited in the Arctic via wet and dry deposition. Still, there are few studies on the complex mercury cycle and how different plant groups absorb Hg. READ MORE

  5. 4. Conservation Genomics of the Long-tailed Duck

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Brynhildur Magnúsdóttir; [2021]
    Keywords : Long-tailed duck; migration; conservation; population structure; genome;

    Abstract : With increasingly warming climate, many bird species have been forced to respond to environmental changes, and the long-tailed duck (Clangula hyemalis) is no exception. The populations of the long-tailed duck have been in decline the past few decades and the species is classified as globally vulnerable and near threatened in both Iceland and Sweden. READ MORE

  6. 5. Evaluation of potential marine current turbine sites in North American waters

    University essay from Uppsala universitet/Elektricitetslära

    Author : Tim Andersson; Muhammad Arsal Akram; Carl-Henrik Carlnäs; Tiffany Salisbury; [2020]
    Keywords : vertical axis; marine current turbines; alaska; florida;

    Abstract : Suitable locations for marine current power generation were scouted. The specific turbines considered in this project are vertical axis turbines and require an water velocity of 0.8 m/s to start and has a system efficiency of 20%. READ MORE