Search for dissertations about: "Atlantic Ocean"

Showing result 1 - 5 of 61 swedish dissertations containing the words Atlantic Ocean.

  1. 1. Tracing pathways in the ocean circulation : A temperature and salinity perspective

    Author : Sara Berglund; Kristofer Döös; Jonas Nycander; Göran Broström; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Lagrangian trajectories; Climate modelling; Atlantic Ocean; Southern Ocean; Ocean circulation; heat; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : The ocean circulation plays an essential role in our climate system. It redistributes heat, salt, carbon and other tracers across the globe, making the climate of Earth more moderate. This thesis targets density differences that are driving the ocean circulation. These differences are caused by changes in temperature and salinity. READ MORE

  2. 2. Atlantic Water in the Nordic Seas : A satellite altimetry perspective on ocean circulation

    Author : Sara Broomé; Johan Nilsson; Jonas Nycander; Léon Chafik; Michael A. Spall; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Arctic Ocean climate; ocean heat transport; sea surface height; topographic control; Lagrangian trajectories; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : The Atlantic Water in the Nordic Seas contributes to the mild climate of Northern Europe and is the main oceanic source of heat for the Arctic. The northward bound transport of the warm and saline Atlantic Water is mediated by a topographically constrained cyclonic boundary current along the Norwegian continental slope. READ MORE

  3. 3. Iodine Isotopes and their Species in Surface Water from the North Sea to the Northeastern Atlantic Ocean

    Author : Peng He; Ala Aldahan; Per Roos; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; iodine isotopes; 129I; 127I; oceans; North Sea; speciation; Atlantic Ocean; English Channel; Celtic Sea; AMS; iodine chemistry; geochemistry; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Abstract : Huge amounts of anthropogenic 129I have been and still are released to the environment through liquid and gaseous discharges from the nuclear fuel reprocessing facilities worldwide and in particular the ones in Europe. Most of this 129I signal has been accumulated in the marine environment which plays a major role in the iodine natural pool. READ MORE

  4. 4. Anthropogenic Radionuclides in the Arctic Ocean: Distribution and Pathways

    Author : Dan Josefsson; Lund Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; americium; plutonium; iodine; strontium; cesium; Sellafield; Chernobyl; global fallout; currents; shelf; ocean; radioactivity; Arctic; Ecology; Ekologi;

    Abstract : Anthropogenic radionuclide concentrations have been determined in seawater and sediment samples collected in 1991, 1994 and 1996 in the Eurasian Arctic shelf and interior. Global fallout, releases from European reprocessing plants and the Chernobyl accident are identified as the three main sources. READ MORE

  5. 5. Some aspects of the Atlantic ocean circulation

    Author : Rezwan Mohammad; Peter Lundberg; Johan Nilsson; Lawrence Mysak; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Oceanography; Thermohaline circulation; Vertical mixing; Altimetry; Nordic Seas; Meteorology; Meteorologi;

    Abstract : The present thesis deals with the ocean circulation from two viewpoints: Pro primo, the dependence of the global thermohaline ocean circulation (THC) on the parameterization of the small-scale vertical mixing processes in the interior of the ocean, and, pro secundo, the dynamics of the circulation in the Nordic Seas. The THC is found be crucially dependent on the parameterization of the small-scale vertical mixing, two types of which have been compared: The commonly used constant diffusivity and a, physically more plausible, stability-dependent parameterization. READ MORE