UNIS contact person: Frank Nilsen
Enrolment in a relevant PhD programme. Strong mathematical background, knowledge in Air-Sea-Ice interaction corresponding to AGF-211 Air-Sea-Ice interaction I and be able to analyse and present data in e.g. Matlab. Experience with numerical modelling is an advantage.
The course describes processes involved in air-sea exchange of heat and momentum at high latitudes. This includes deep convection and mechanisms for breaking down vertical stratification in the ocean. Production of dense water by cooling or ice freezing at the surface is studied with examples from case studies in the Svalbard area. Surface buoyancy fluxes and wind-stirring are described as agents for eroding the base of the mixed layer, whereas tides and internal waves interacting with topography, double diffusion and thermobaricity are considered in the discussion of deep mixing.
Standard oceanographic and boundary layer observations are supplemented with detailed measurements of turbulence structure and turbulent fluxes in weakly stratified fluid layers. The results of the analyzed field observations will be compared with numeric models, which will be set up for the actual region. Model experiments will be conducted with coupled models, including sea ice. The fieldwork will be conducted by an ice-going research vessel and observations will be carried out above, under, and on top of the sea ice.
Upon completing the course, the students will be able to develop new knowledge and be in the forefront of :
- processes controlling the sea ice cover in the Marginal Ice Zone (air-ocean)
- thermodynamic and mechanical ice growth
- boundary layer theories.
Upon completing the course, the students will be able to plan and carry out research within air-ice-ocean processes and:
- be able to analyse and calculate thermodynamic- and mechanical ice growth in the Marginal Ice Zone (MIZ)
- be able to analyse data collected during air-ice-sea campaigns
- be able to classify boundary layers above and below sea ice and apply turbulence theory in order to calculate the turbulent heat- and salt fluxes in the water column
- have acquired skills in developing a model for sea ice growth and water mass transformation and how to calibrate the model using field data.
Upon completing the course, the students will:
- be familiar with Arctic marine fieldwork operations
- gain experience in leading a small group project
- be able to handle oceanographic instruments in the field, processing the data, writing a scientific report and presenting the results in public
- be able to discuss and defend the scientific results from individual field reports.
The course extends over ca 6 weeks including compulsory safety training, and is run in combination with AGF-311.
The effective learning of air-ice-sea interaction II has four essential components:
- Building a knowledge base through classroom lectures, seminars, and laboratory experiments.
- Fieldwork, where the students engage in research case studies using their knowledge base and theoretical models in the real world. Students are supervised in using different instruments and measuring techniques, and work in cooperative learning groups.
- Give a seminar based on a scientific paper listed in the course syllabus.
- Writing reports, where the analysis of data is tested against theoretical model, and vice versa. Reports are written under supervision, where feedback and formative / peer assessments are given.
The final examination is oral where we focus on the understanding of the physical processes studied in the course. The students are allowed to defend their report and discuss it in a larger context, connecting it to other students’ reports as well as theory.
Total lecture hours: 30 hours.
Total seminar hours: 10 hours.
Cruise: 5–7 days.
Compulsory learning activities:
Field work, leading writing of field report and leading presentation of field report. The PhD students report should be comparable to a scientific article manuscript suitable for publication in scientific journal. The PhD students must also hold a seminar based on a scientific paper listed in the course syllabus.
All compulsory learning activities must be approved in order to sit the exam.
Percentage of final grade