Search for dissertations about: "deep sea"

Showing result 21 - 25 of 108 swedish dissertations containing the words deep sea.

  2. 21. Testing palaeomagnetic and 14C based geochronological methods in the Baltic Sea

    Author : Bryan Lougheed; Kvartärgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; coastal; geochronology; palaeomagnetic secular variation; PSV; radiocarbon; 14C; reservoir age; R t ; ΔR; salinity; δ18O; geomagnetic field; Holocene; deglacial; Fennoscandia.;

    Abstract : The Baltic Sea is a continental shelf sea that is influenced by both river runoff and marine water. The two water masses are vertically stratified in the Baltic Sea, resulting in a positive, estuarine circulation system, which has undergone changes in the past due to isostatic uplift of the Baltic basin. READ MORE

  4. 22. 231Pa and Th isotopes as tracers of deep water ventilation and scavenging in the Mediterranean Sea

    Author : Sandra Gdaniec; Per Anerson; Carl-Magnus Mörth; Matthieu Roy-Barman; Helen Coxall; Per Roos; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Protactinium; Thorium; particle transport; deep water circulation; geokemi; Geochemistry;

    Abstract : The naturally occurring isotopes 231Pa and 230Th are used as tracers of marine biogeochemical processes. They are both produced from the radioactive decay of their uniformly distributed uranium parents (235U and 234U) in seawater. READ MORE

  5. 23. Benthic metabolism and sediment nitrogen cycling in Baltic sea coastal areas : the role of eutrophication, hypoxia and bioturbation

    Author : Stefano Bonaglia; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eutrophication; Sediment; Benthic Flux; Nitrogen Cycle; Denitrification; Baltic Sea; Biogeochemistry; biogeokemi; marin- och brackvattensekologi; Marine and Brackish Water Ecology; Marine Ecology; marin ekologi; geokemi; Geochemistry;

    Abstract : Eutrophication is one of the greatest threats for the Baltic Sea, and one of its more critical consequences is bottom water hypoxia. Nutrient enrichment and oxygen-depletion affect both the deep central basins and a number of coastal areas, even though strategies for nutrient reduction have lately been implemented. READ MORE

  6. 24. Benthic Nitrogen Cycling in Deep-Sea and Contrasting Continental Margin Environments

    Author : Jenny Brunnegård; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  7. 25. Transport, degradation and burial of organic matter released from permafrost to the East Siberian Arctic Shelf

    Author : Lisa-Marie Bröder; Örjan Gustafsson; Tommaso Tesi; Elizabeth Canuel; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; organic carbon; marine sediments; East Siberian Sea; Laptev Sea; cross-shelf transport; degradation rate constants; carbon isotopes; terrestrial biomarkers; HMW wax lipids; lignin phenols; compound-specific radiocarbon analysis; Applied Environmental Science; tillämpad miljövetenskap;

    Abstract : Permafrost soils in the Arctic store large quantities of organic matter, roughly twice the amount of carbon that was present in the atmosphere before the industrial revolution. This freeze-locked carbon pool is susceptible to thawing caused by amplified global warming at high latitudes. READ MORE