Essays about: "permafrost"

Showing result 1 - 5 of 50 essays containing the word permafrost.

  1. 1. Greenhoue gas flux over a 50-year post permafrost thaw gradient. Decomposition of soil organic carbon from the Swedish tussock tundra.

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Johan Martinelli; [2020-02-11]
    Keywords : greenhouse gas; permafrost;

    Abstract : As the globe is warming the extent of permafrost drastically decreases in the high latitudes. Upon thawthe stored soil organic carbon (SOC) undergoes rapid decomposition and is partly released as trace gasesto the atmosphere. READ MORE

  2. 2. Feedback effects in the Arctic region and how they affect the global climate

    University essay from Lunds universitet/Miljövetenskaplig utbildning

    Author : Lotta Nyman; [2020]
    Keywords : Arctic warming; Arctic change; Climate feedback effect; Lower latitude weather; Arctic amplification; Permafrost; Earth and Environmental Sciences;

    Abstract : The Arctic is warming at a rate two to three times that of the global average. Although only covering a small area of the globe, it is a vital component of the climate system. Through climatic feedback effects the warming is enhanced, and risks leading to further climate change. READ MORE

  3. 3. The potential disturbance of the 210Pb profile in peat cores by roots and the implications for 210Pb dating.

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

    Author : Nora Spjut; [2020]
    Keywords : Permafrost thaw; 210Pb dating; and Dwarf shrub roots;

    Abstract : At this moment there is a gap in information regarding the affect roots might have on 210Pb distribution in peat cores and in turn the obtained chronologies by 210Pb dating. Therefore, four peat cores were collected from the snow manipulation study site within the mire complex Storflaket (68°20048″N, 18°58016″E). READ MORE

  4. 4. Snow insulation effects across the Arctic : evaluating a revised snow module in LPJ-GUESS

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Alexandra Pongrácz; [2019]
    Keywords : active layer depth; Arctic; LPJ-GUESS; snow; soil temperature; Earth and Environmental Sciences;

    Abstract : The effect of future changes in temperature and precipitation patterns on arctic ecosystem functioning is often assessed using state-of-the-art ecosystem models. Many models however lack detailed representation of wintertime processes, as pointed out by recent studies (Wang et al. 2016, Slater and Lawrence 2013). READ MORE

  5. 5. Microbial community responses to freeze : thaw cycles in active layer soils of permafrost tundra, Disko Island, Greenland

    University essay from SLU/Dept. of Soil and Environment

    Author : Isabelle Gough; [2019]
    Keywords : microbial ecology; active layer soils; bacteria; fungi; permafrost system; amplicon-sequencing; QIIME2; FUN-guild; ; greenhouse gas fluxes; fluorogenic enzyme as-says;

    Abstract : Permafrost affected soils are a vast pool of Carbon, storing around 1300Pg below the ground. As a result of climate change, permafrost soils that have been frozen for thousands of years are thawing, causing the ancient organic matter to be metabolised by microorgan-isms. READ MORE