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... 

Vitenskapelig artikkel

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

Rapport

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

Poster

• Kristoffersen, Arne Skodvin; Tessin, Elinor; Sandven, Håkon Johan et al. (2024). Optical properties of Norwegian fjords: Glacial meltwater and coccolithophore blooms. (ekstern lenke)
• Sandven, Håkon Johan; Connan-McGinty, Stacey; Hamre, Børge 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)
• Sandven, Håkon Johan; Granskog, Mats; McKee, David et al. (2023). Optical observations and parametrizations of Svalbard coastal waters and the adjacent Barents Sea. (ekstern lenke)
• Koenig, Zoe Charlotte; Lind, Sigrid Gjessing; Lundesgaard, Øyvind 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)
• Kristoffersen, Arne Skodvin; Tessin, Elinor; Hamre, Børge et al. (2022). Two shades of green: Comparing the optical properties of an Emiliania huxleyi bloom and a glacial meltwater fjord. (ekstern lenke)
• Sandven, Håkon; Kristoffersen, Arne Skodvin; Chen, Yi-Chun et al. (2018). Measurements of volume scattering function and particle size distribution in Norwegian fjords and Arctic waters. (ekstern lenke)

Vitenskapelig foredrag

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

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