Fysiker som jobber med tverrfaglig forskning knyttet opp lys i havet. Lys er svært viktig for marine økosystemer, særlig planteplankton som bruker lys til å omdanne CO2 til biomasse og oksygen gjennom fotosyntese. Men det er fortsatt vanskelig å modellere akkurat hvor mye lys som trenger ned til 10, 30 eller 100 meter under havflaten – hvordan kan vi gjøre dette bedre? Dette er det jeg jobber med i min nåværende kontrakt på UiB. 

I tillegg blir optiske målinger ofte brukt til å estimering av hvor mye plankton eller andre mikroskopiske partikler som befinner seg i havet, f. eks. ved bruk av fluorimetre, turbidimetre eller satelliter, men det er mange utfordringer knyttet til å forsøke å måle denne komplekse mikroskopiske verdenen på en enkel måte... 

Konferanseposter

• Arne Skodvin Kristoffersen; Elinor Tessin; Børge Hamre et al. (2022). Two shades of green: Comparing the optical properties of an Emiliania huxleyi bloom and a glacial meltwater fjord. (ekstern lenke)
• Zoe Charlotte Koenig; Sigrid Gjessing Lind; Øyvind Lundesgaard et al. (2023). From Winter to Late Summer in the Northwestern Barents Sea Shelf: Sea Ice and Upper Ocean Evolution and Impacts on Nutrient and Phytoplankton Dynamics. (ekstern lenke)
• Håkon Johan Sandven; Stacey Connan-McGinty; Børge Hamre et al. (2024). Modeling changes in light availability in the Barents Sea and Arctic Ocean driven by sea ice decline over the last four decades. (ekstern lenke)
• Håkon Sandven; Arne Skodvin Kristoffersen; Yi-Chun Chen et al. (2018). Measurements of volume scattering function and particle size distribution in Norwegian fjords and Arctic waters. (ekstern lenke)
• Arne Skodvin Kristoffersen; Elinor Tessin; Håkon Johan Sandven et al. (2024). Optical properties of Norwegian fjords: Glacial meltwater and coccolithophore blooms. (ekstern lenke)
• Håkon Johan Sandven; Mats Granskog; David McKee et al. (2023). Optical observations and parametrizations of Svalbard coastal waters and the adjacent Barents Sea. (ekstern lenke)

Vitenskapelig artikkel

• Håvard Stavn Ugulen; Håkon Johan Sandven; Børge Hamre et al. (2022). Efficient Monte Carlo simulation reveals significant multiple scattering errors in underwater angular scattering measurements. (ekstern lenke)
• Aga Nowak; Elisabeth Isaksson; Øyvind Sunde et al. (2024). Antarctic Blue Ice Areas are hydrologically active, nutrient rich and contain microbially diverse cryoconite holes. (ekstern lenke)
• Beatrice Tomasi; John Mulholland; Antonio Vasilijevic et al. (2025). Measured effective rates for underwater optical communications in the Trondheimsfjord. (ekstern lenke)
• Håkon Sandven; Arne Skodvin Kristoffersen; Yi-Chun Chen et al. (2020). In situ measurements of the volume scattering function with LISST-VSF and LISST-200X in extreme environments: evaluation of instrument calibration and validity. (ekstern lenke)
• Zoe Charlotte Koenig; Morven Muilwijk; Håkon Johan Sandven et al. (2024). From winter to late summer in the northwestern Barents Sea shelf: Impacts of seasonal progression of sea ice and upper ocean on nutrient and phytoplankton dynamics. (ekstern lenke)
• Håkon Johan Sandven; Mats Granskog; Anders Martin Frugård Opdal et al. (2025). Increased Light Availability in the Northern Barents Sea Driven by Sea Ice Loss. (ekstern lenke)
• Håvard Stavn Ugulen; Daniel Warren Koestner; Håkon Johan Sandven et al. (2023). Neural network approach for correction of multiple scattering errors in the LISST-VSF instrument. (ekstern lenke)
• Tristan Petit; Børge Hamre; Håkon Johan Sandven et al. (2022). Inherent optical properties of dissolved and particulate matter in an Arctic fjord (Storfjorden, Svalbard) in early summer. (ekstern lenke)
• Håkon Sandven; Børge Hamre; Tristan Petit et al. (2023). Seasonality and drivers of water column optical properties on the northwestern Barents Sea shelf. (ekstern lenke)

Konferanseforedrag

• Camilla Sætre; Håvard Stavn Ugulen; Håkon Johan Sandven et al. (2022). UNDERWATER OPTICAL COMMUNICATIONS AND CONTRIBUTION FROM FORWARD SCATTERED LIGHT. (ekstern lenke)
• Håkon Sandven; Arne Skodvin Kristoffersen; Yi-Chun Chen et al. (2018). Characterisation of the angular distribution of light scattered by ocean particles. (ekstern lenke)
• Håkon Johan Sandven (2024). Light availability in the Barents Sea and Arctic Ocean: Modelling and observations. (ekstern lenke)
• Håvard Stavn Ugulen; Håkon Johan Sandven; Børge Hamre et al. (2022). Simulating and correcting LISST-VSF measurements. (ekstern lenke)
• Håkon Sandven; Arne Skodvin Kristoffersen; Yi-Chun Chen et al. (2018). Measurements of volume scattering function and particle size distribution in natural waters in the Arctic Ocean.. (ekstern lenke)
• Ole Arve Misund; Paul Dodd; Dmitry V Divine et al. (2022). Arctic Expedition North Pole 2022 with "Kronprins Haakon". (ekstern lenke)
• Håkon Johan Sandven; Børge Hamre; Hongbo Liu et al. (2022). Observing the Barents Sea with bio-optical measurements. (ekstern lenke)
• Håkon Sandven; Arne Skodvin Kristoffersen; Yi-Chun Chen et al. (2019). Particle size distribution measurements in glacial meltwater using laser diffractometry. (ekstern lenke)
• Håkon Johan Sandven; Børge Hamre; Stacey Connan-McGinty et al. (2024). Sea ice decline drives strong changes in Barents Sea light availability in the last four decades. (ekstern lenke)
• Håkon Johan Sandven; Børge Hamre; Stacey Connan-McGinty et al. (2024). Strong changes in Barents Sea light availability in last four decades due to sea ice decline. (ekstern lenke)

Forskningsrapport

• Hanne Sagen; Espen Storheim; Astrid Stallemo et al. (2025). Useful Arctic Knowledge - Training, Collaboration, and Innovation in ocean observing A contribution to the Ocean Decade. (ekstern lenke)
• Hanne Sagen; Stein Sandven; Torill Hamre et al. (2020). UAK 2020: Research School in the Barents Sea with KV Svalbard. (ekstern lenke)

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