Sökning: "boreal lake"

Visar resultat 1 - 5 av 32 uppsatser innehållade orden boreal lake.

  1. 1. Controls over stream temperature in a northern boreal landscape

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Oskar Damström; [2023]
    Nyckelord :Aquatic ecosystems; Climate change; Stream warming; Boreal streams;

    Sammanfattning : With widespread increases in air temperature, it is expected that the temperature of aquatic ecosystems will also increase, especially at high latitudes. Warmer streams and rivers could have severe, direct impacts on cold-adapted aquatic fauna but may also indirectly influence species by reducing the amount of suitable habitat. LÄS MER

  3. 2. 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

  4. 3. Modelling the Effects of Climate Change on Future DOC Export to Lake Mälaren Using a Generalized Watershed Loading Functions (GWLF) Model

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Klara Lindqvist; [2022]
    Nyckelord :Hydrology; DOC; browning; climate change; drinking water production; Mälaren; Hydrologi; DOC; brunifiering; klimatförändringar; dricksvattenproduktion; Mälaren;

    Sammanfattning : Browning of boreal freshwaters due to an increased export of terrestrial dissolved organic carbon (DOC) has been observed for some decennia. Drivers include recovery from acid deposition and changing climate and land cover. LÄS MER

  5. 4. Väder- och klimatförändringars effekter på produktivitet och sedimentation i en boreal sjö

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Albin Eriksson; [2021]
    Nyckelord :Chlorophyll; Climate-change; Paleolimnology; Sediment traps; Freeze-coring; Klorofyll; Klimatförändringar; Paleolimnologi; Sedimentfällor; Frysproppar;

    Sammanfattning : This report aimed to investigate how chlorophyll-concentrations (Chl-a) in the water column and varved sediments were affected by changes in air temperature and precipitation and consequently how climate change will affect the sedimentation and productivity in boreal aquatic ecosystems. VRS (visible-reflectance-spectroscopy) was used to asses Chl-a and its derivates in sediment trap samples between 2002-2021 and in a series of freeze cores (1979-2021) from lake Nylandssjön, with annually laminated sediments. LÄS MER

  7. 5. 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