Events

NERSC Internal Seminar by Edson Silva: Ocean colour for Norwegian coastal water
Ocean colour for Norwegian coastal water.
by Edson Silva, NERSC
Abstract:
Ocean color remote sensing has supported the monitoring of ocean water quality since the 1980s. However, bio-optical algorithms designed for the open ocean exhibit poor accuracy in coastal waters due to the inflow of dissolved and particulate matter from land, necessitating the calibration of regional bio-optical models. In this study, we calibrated bio-optical models for chlorophyll-a (Chl-a) concentration and Secchi depth (Zsd) in Norwegian coastal waters using Sentinel-3 OLCI. Support Vector Machines (SVM) and Multi-Layer Perceptron (MLP) models were employed for calibration, utilizing in situ observations of Chl-a and Zsd along with Sentinel-3 OLCI optical bands processed through three atmospheric corrections: Basic Atmospheric Correction (BAC), Polymer, and Acolite. The calibrated regional models outperformed standard models across all atmospheric corrections. For Chl-a estimation, the Pearson correlation coefficient improved from 0.19 (BAC-OC4ME) to 0.6 (Polymer–SVM), while Zsd estimations improved from 0.27 (BAC-OC4ME derived) to 0.65 (Polymer–SVM). Error rates were also reduced by more than half with the regional models. The application of the regional models led to two key improvements: (1) correction of Chl-a overestimations in inner coastal areas, likely caused by colored dissolved organic matter, and (2) improved representation of spring and summer bloom phenology along the coast. For Zsd, the main improvement was the reduction of overestimations in Northern Norway. In conclusion, the regional models, particularly Polymer–SVM, provide more accurate estimates and better represent the dynamics of Chl-a and Zsd along the Norwegian coastline, which can support water quality monitoring in the future up to 300 m resolution and daily frequency."

Prøveforelesning Andrew Walter Seidl
Andrew Walter Seidl holder prøveforelesning 27. mars kl. 12:00 over oppgitt emne: “Atmospheric moisture transport: processes, consequences, and uncertainties”.
I prøveforelesningskomitéen er:
Joachim Reuder, leder
Laura Dietrich
Costijn Zwartz
Veiledere:
Harald Sodemann (hovedveileder)
Hans Christian Steen-Larsen (biveileder)
Marius Opsanger Jonassen (biveileder)
Prøveforelesningen holdes på U105. (Geofysisk institutt)
Studenter er også velkomne!

Machine Learning Journal Club
Klimaomstillngskonferansen
Welcome to Sogndal – conference is held in Norwegian
Årets klimaomstillingskonferanse er i Sogndal 6.-7. mai. Programmet er nå sluppet – påmeldingsfrist 11. april https://klimaomstilling.no/
Velkommen til vakre Sogndal og givende møter med forskere, offentlige aktører og næringsliv.
Bjerknes Proposal Writing Workshop 2025 From idea to project: Writing successful project proposals
Registration deadline: 24.04.2025
Link for registration: https://forms.office.com/e/GA2YrAYWjP
Venue: UiB Læringsarena, Nygårdsgaten 5, Bergen
Workshop leaders: Friederike U. Hoffmann, Research coordinator at GFI and EU expert evaluator; Nadine Goris, Researcher and research adviser at NORCE; Catherine Downy, Research adviser at NERSC
Credit point: 1 (ECTS)
Maximum number of participants: 15
Target group is early career scientists (Post Doc, early career researchers, PhD) in climate sciences with little or no experience in proposal writing. The workshop targets both those who already have a concrete project idea and a plan to write a proposal, and those who want to gain general proposal writing and project development skills.
The workshop will enable you to apply for external funding of your own research. You will learn how to develop a research idea into a draft for a successful research project proposal.
Using your own research ideas, you will learn:
how to present a project idea shortly and concisely (pitch presentation)
how to develop and sharpen your research idea
how to plan and structure a draft proposal
how to develop the different components of the draft proposal
how to draft a project budget
where you can apply for funding
The course includes lectures, group work and plenary discussion. During the workshop, the participants will develop the project ideas of 3 participants into ready-to-use draft proposals.
Priorities if the workshop is overbooked: 1. Bjerknes members with project ideas, 2. Bjerknes members without project ideas, 3. Non-Bjerknes members with project ideas. For PhD students: this workshop makes the most sense if you are in the 3rd (or 4th) year of your PhD. PhD students in their 1st or 2nd year will not be prioritized – unless they are working on a proposal, such as for a travel grant, support for events, etc. In this case, please indicate this in your registration.
Find general information about the workshop here
Find reports on the workshop here
For questions, please contact Friederike.Hoffmann@uib.no

Machine Learning Journal Club

Bjerknes Climate Prediction Unit seminar: Applications of climate predictions

Bjerknes Climate Prediction Unit seminar: Mechanisms for predictability
