Muhammad Asim

Master of science Muhammad Asim will Friday March 31, 2023, at 12:15 hold his disputas for the PhD degree in Science. The title of his thesis is: 

"Optical remote sensing of water quality parameters retrieval in the Barents Sea"


This thesis addresses various aspects of monitoring water quality indicators (WQIs) using optical remote sensing technologies. The dynamic nature of aquatic systems necessitate frequent monitoring at high spatial resolution. Machine learning (ML)-based algorithms are becoming increasingly common for these applications. ML algorithms are required to be trained by a significant amount of training data, and their accuracy depends on the performance of the atmospheric correction (AC) algorithm being used for correcting atmospheric effects. AC over open oceanic waters generally performs reasonably well; however, limitations still exist over inland and coastal waters. AC becomes more challenging in the high north waters, such as the Barents Sea, due to the unique in-water optical properties at high latitudes, long ray pathways, as well as the scattering of light from neighboring sea ice into the sensors’ field of view adjacent to ice-infested waters.

Evaluation Committee 

  • Dr. Ewa Kwiatkowska, Eumesat, Darmstad, Germany (1. opponent)
  • Professor Maycira Costa, University of Victoria, Canada (2. opponent)
  • Professor Anthony Doulgeris, IFT, UiT (intern member and leader of the committee)


  • Researcher Katalin Blix, IFT, UiT (main supervisor)
  • Professor Torbjørn Eltoft, IFT, UiT
  • Professor Marit Reigstad, Department of Arctic and Marine Biology, UiT
  • Professor Camilla Brekke, IFT, UiT
  • Associate Professor Atsushi Matsuoka, IFT, UiT

The Disputas will be led by Professor Arne Smalås, dean of the Faculty of Science and Technology at UiT.

Streaming site

The disputas and trial lecture will be streamed from these sites:

Trial Lecture (10:15 - 11:00)

Disputas (12:15 - 16:00)


The thesis is available through Munin.

When: 31.03.23 at 12.15–16.00
Where: Store Auditorium B302, Realfagsbygget
Location / Campus: Digital, Tromsø
Target group: Employees, Students, Guests, Invited, Unit
Contact: Helge Ravn
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