Sökning: "boreal lakes"

Visar resultat 1 - 5 av 35 uppsatser innehållade orden boreal lakes.

  1. 1. Deposition av Black carbon i sjöar efter den stora skogsbranden i Västmanland 2014

    Magister-uppsats, Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC); Lunds universitet/Miljövetenskaplig utbildning

    Författare :Danny Wong; [2023]
    Nyckelord :Black carbon; BC; climate; environment; wildfire; boreal forests; lake sediments; Västmanland.; Earth and Environmental Sciences;

    Sammanfattning : Black carbon (BC) is produced during incomplete combustion of Biomass and fossil fuels. BC and other carbonaceous pollutants have characteristics that affect the climate, environment, and human health. Historically, BC emissions have been measured and monitored in the atmosphere, and BC emissions to the air are quite well documented. LÄS MER

  3. 2. Spatial resolution of methane production and ebullition in Lake Alsta

    Master-uppsats, Uppsala universitet/Limnologi; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Evelina Hiltunen; [2021]
    Nyckelord :methane; ebullition; TN;

    Sammanfattning : Freshwater ecosystems cover about 4 % of the Earth’s surface. Yet they are important components in the global C cycle, as they in addition to their within-lake primary production, receive and process organic matter loads originating from terrestrial environments. The boreal forest biome has the highest density of lakes globally. LÄS MER

  4. 3. Patterns and factors affecting brownification in a boreal river

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Emil Winqvist; [2021]
    Nyckelord :Bolmen; brownification; precipitation; discharge; sulfur deposition; land use; trend analysis; Technology and Engineering;

    Sammanfattning : During the last decades a brownification of the lakes and streams in the northern hemisphere has been observed. The change has been attributed to an increase of organic content in the water, leached from the top soil layers, called humic substances. LÄS MER

  5. 4. The influence of diel cycles on the bacterial community composition of two boreal lakes : A case study in Jämtland

    Master-uppsats, Uppsala universitet/Limnologi; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Sofia Papadopoulou; [2021]
    Nyckelord :freshwater; lake; diel cycle; bacterioplankton; bacterial community composition;

    Sammanfattning : In the Boreal region, the length of day and night varies extremely over the year and organisms are exposed to different diel (24 h) fluctuations of light and temperature. Among them are pelagic populations of bacteria that are ubiquitous in freshwater ecosystems. LÄS MER

  7. 5. Influence of land cover changes on organic carbon and organic nitrogen concentrations in Swedish rivers

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

    Författare :Julia Iwan; [2021]
    Nyckelord :Total Organic Carbon TOC ; Total Organic Nitrogen TON ; Land Cover Change; Sweden; WaterBase; Earth and Environmental Sciences;

    Sammanfattning : There is increasing pressure on freshwater systems due to excessive nutrient loading by anthropogenic sources. In Sweden, freshwaters have become browner due to increasing exports of organic matter from soils into streams, rivers, and lakes. LÄS MER