Sökning: "lake sediments"

Visar resultat 1 - 5 av 124 uppsatser innehållade orden lake sediments.

  1. 1. Changes in lake-water organic carbon over recent centuries in northern Sweden, Västerbotten : Past and present mechanisms, and the potential implications on mercury

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

    Författare :Magnusson Petter; [2023]
    Nyckelord :Lake-water TOC; Summer forest farming; traditional agriculture; land-use; geochemistry; mercury;

    Sammanfattning : Due to the current increase in lake water total organic carbon (LW-TOC), many studies have investigated the long-term dynamics using lake sediments. However, these have mainly been focused on Sweden’s south and south-central parts. LÄS MER

  3. 2. Unlocking lost potentials : Reviving water in Falun as a living and interweaved spine

    Master-uppsats, KTH/Urbana och regionala studier

    Författare :Filip Wadsten; [2023]
    Nyckelord :urban planning; urban design; Falun; polluted water; sediment challenges; stormwater management; flooding management; green structure; movement network; new nodes;

    Sammanfattning : The city of Falun has a rich history of mining with the open mine, Stora Stöten, centrally located in the city and nowadays a well-known world heritage tourist attraction. The mine is the main reason that Falun even exists. LÄS MER

  4. 3. 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

  5. 4. Mercury accumulation in lake sediments on different time scales – the influence of algal primary production

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

    Författare :Anne Rebotzke; [2023]
    Nyckelord :mercury; lake sediment; primary productivity; algal scavenging; biogenic silica; diatom proxy; chlorophyll-a; organic matter;

    Sammanfattning : The aim of this work is to test the proposed approach of algal scavenging as a driver of sediment mercury (Hg) on different time scales and to gain a better understanding of the mechanisms of Hg accumulation in lake sediments. A 3000-year sediment record from Nylandssjön in northern Sweden was analysed for this purpose, as well as a 20-year sediment record from the seasonal sediment traps of this lake. LÄS MER

  7. 5. Vilken ny kunskap ger aDNA-analyser om vegetationsutvecklingen i Nordeuropa under och efter Weichsel-istiden?

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Beatrix Cordes; [2023]
    Nyckelord :aDNA; ancient DNA; vegetationshistoria; vegetationsförändring; PCR; NGS; Nordeuropa; next generation sequencing; Weichselistiden; Earth and Environmental Sciences;

    Sammanfattning : Under de senaste 30 åren har en ny metod för att få information om tidigare ekosystem utveck- lats, nämligen att analysera gammalt (“ancient”) DNA (aDNA). Denna forskningsgren är fortfarande ung men har redan hittat många områden inom vilka den kan tillämpas. LÄS MER