Search for dissertations about: "atlantic-ocean"

Showing result 1 - 5 of 40 swedish dissertations containing the word atlantic-ocean.

2. 1. 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 : NATURVETENSKAP; NATURAL SCIENCES; 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. 2. Some aspects of the Atlantic ocean circulation

   Author : Rezwan Mohammad; Peter Lundberg; Johan Nilsson; Lawrence Mysak; Stockholms universitet; []
   Keywords : 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

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

   Author : Sara Berglund; Kristofer Döös; Jonas Nycander; Göran Broström; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 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

6. 4. Eel migration - results from tagging studies with relevance to management

   Author : Niklas B. Sjöberg; Sture Hansson; Håkan Wickström; Erik Petersson; Alan Walker; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Anguilla anguilla; Migration; Stocking; Marking; Anguillicola crassus; Data storage tags; Carlin tagging; Strontium; Survival analysis; Dormancy; Lake Mälaren; Baltic Sea; Atlantic Ocean; Sargasso Sea; Marine Ecology; marin ekologi;

   Abstract : In response to the drastic decline of the European eel (Anguilla anguilla (L.)) fisheries have been reduced and elvers are stocked in areas where natural abundances are low. READ MORE

7. 5. Dynamical aspects of coherent eddies in the North Atlantic Ocean : Insights from Satellite Observations

   Author : Arunraj Kondetharayil Soman; Léon Chafik; Johan Nilsson; Caroline Katsman; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eddy detection and tracking; Ocean heat content; Satellite altimetry; Lagrangian Trajectories; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

   Abstract : Oceanic mesoscale eddies, often referred to as the “weather of the ocean”, have horizontal scales of O(10) − O(102) kilometers and timescales spanning days to months. These structures comprise a complex system of coherent eddies (meaning they retain their shape and structure over time and space), filaments, and spirals that influence the transport of heat, salt, and nutrients in the ocean. READ MORE