Sökning: "atmosfärvetenskap och oceanografi"
Visar resultat 11 - 15 av 66 avhandlingar innehållade orden atmosfärvetenskap och oceanografi.
11. Tidally generated internal waves
Sammanfattning : This thesis deals with the internal tide in the deep ocean, which is generated by the barotropic tide flowing over the bottom topography. The energy flux from the barotropic tide to the internal-wave field at the bottom is calculated using a method based on linear-wave theory and the traditional WKB approximation valid for a slowing varying vertical stratification. LÄS MER
12. Spiritum sidus : The star of our life – On internal tides in the ocean
Sammanfattning : Tidal currents flowing over rough bathymetry generate internal tides. These internal waves with tidal frequency can be decomposed into vertical modes. Low modes generally travel thousands of kilometers, until they break due to shear flow instabilities, while high modes are believed to break close to the generation site. LÄS MER
13. The global marine carbon system through time
Sammanfattning : Carbon dioxide is an important greenhouse gas and in order to understand its effect on the climate we need to identify its sources and sinks. This thesis focuses on different aspects of the marine carbon system and the exchange of carbon between the ocean and the atmosphere. LÄS MER
14. An investigation into ocean thermodynamics and water-mass transformation
Sammanfattning : This thesis presents oceanic budgets of potential temperature, salinity and buoyancy as well as a novel way of diagnosing water-mass transformation in salinity-temperature space. The buoyancy of seawater is given by a nonlinear function of temperature, salinity and pressure and much of the work in this thesis revolves around how fluxes of heat and salinity influence the buoyancy of seawater through these nonlinearities. LÄS MER
15. Dynamical aspects of coherent eddies in the North Atlantic Ocean : Insights from Satellite Observations
Sammanfattning : 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. LÄS MER
