Bakgrunn og aktiviteter
Geir Johnsen is a professor in marine biology at the Department of Biology (NTNU), Prof II at University Centre on Svalbard (UNIS), and is one of the founding partners in a NTNU spin-off company Ecotone using new optical techniques for mapping and monitoring the marine environment.
- Marine ecology and biodiversity
- Pigment chemotaxonomy
- Underwater robotics and sensor development for in situ identification
- Mapping and monitoring of bio-geo-chemical objects of interest in the marine environment
He has been an adviser for 34 MSc students and 12 PhD candidates. Currently, he advises 10 MSc students and 5 PhD candidates.
He has published more than 100 papers in international scientific journals and been a co-editor for the books:
- "Ecosystem Barents Sea" (Tapir Academic Press)
- "Phytoplankton pigments: Updates on Characterization, Chemotaxonomy and Applications in Oceanography" (Cambridge University Press, 2011).
Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
- (2018) First hyperspectral imaging survey of the deep seafloor: High-resolution mapping of manganese nodules. Remote Sensing of Environment. vol. 209.
- (2018) The advective origin of an under‑ice spring bloom in the Arctic Ocean using multiple observational platforms. Polar Biology.
- (2018) Use of an Autonomous Surface Vehicle reveals small-scale diel vertical migrations of zooplankton and susceptibility to light pollution under low solar irradiance. Science Advances. vol. 4.
- (2017) Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ic. Scientific Reports. vol. 7.
- (2017) Windows in Arctic sea ice: light transmission and ice algae in a refrozen lead. Journal of Geophysical Research - Biogeosciences. vol. 122 (6).
- (2017) Spectral characteristics of coralline algae: a multi-instrumental approach, with emphasis on underwater hyperspectral imaging. Applied Optics. vol. 56 (36).
- (2017) Seabirds during Arctic Polar Night: underwater observations from Svalbard archipelago, Norway. Waterbirds (De Leon Springs, Fla.). vol. 40 (3).
- (2016) Ice-tethered observational platforms in the Arctic Ocean pack ice. IFAC-PapersOnLine. vol. 49 (23).
- (2016) Bioluminescence as an ecological factor during high Arctic polar night. Scientific Reports. vol. 6.
- (2016) Development of bryozoan fouling on cultivated kelp (Saccharina latissima) in Norway. Journal of Applied Phycology. vol. 28 (2).
- (2016) The use of underwater hyperspectral imaging deployed on remotely operated vehicle – methods and applications. IFAC-PapersOnLine. vol. 49 (23).
- (2015) Is ambient light during the high Arctic polar night sufficient to act as a visual cue for zooplankton?. PLoS ONE. vol. 10 (6).
- (2015) Unexpected levels of biological activity during the polar night offer new perspectives on a warming Arctic. Current Biology. vol. 25 (19).
- (2015) Enabling technology for Arctic research. Pan European Networks: Science and Techology Magazine. vol. 15.
- (2015) In the dark: a review of ecosystem processes during the Arctic polar night. Progress in Oceanography. vol. 139.
- (2015) Assessing the potential impact of water-based drill cuttings on deep water calcareous red algae using species specific impact categories and measured oceanographic and discharge data. Marine Environmental Research. vol. 112.
- (2015) Assessing the potential impact of water-based drill cuttings on deep-water calcareous red algae using species specific impact categories and measured oceanographic and discharge data. Marine Environmental Research. vol. 112.
- (2015) Integrated environmental mapping and monitoring, a methodological approach to optimise knowledge gathering and sampling strategy. Marine Pollution Bulletin. vol. 96 (1-2).
- (2015) Divinyl chlorophyll a in the marine eukaryotic protist Alexandrium ostenfeldii (Dinophyceae). Environmental Microbiology. vol. 18 (2).
- (2014) Arctic complexity: A case study on diel vertical migration of zooplankton. Journal of Plankton Research. vol. 36 (5).