Geir Pedersen

Key Qualifications

Physics - underwater acoustics - fisheries/bio-acoustics - technology. 

Acoustic backscatter by underwater targets (plankton, fish, gas bubbles, oil droplets), underwater sound generation and propagation, acoustic measurements and modelling. 

Methodology and autonomous platforms for marine data collection. Marine data processing and analysis.

Education

2002-2007 PhD – Physics/fisheries acoustics: Disputation date: 12.04.2007. Department of Physics and Technology, University of Bergen, Norway

1995-2001 Master of Science – Physics/hydroacoustics Department of Physics and Technology, University of Bergen, Norway 

Publications

Peer-reviewed publications (selected)

B. Khodabandeloo, M. D. Agersted, T. A. Klevjer, G. Pedersen, and W. Melle, “ Mesopelagic flesh shear viscosity estimation from in situ broadband backscattering measurements by a viscous–elastic model inversion ,” ICES J. Mar. Sci., vol. 78, no. 9, pp. 3147–3161, 2021.

S. C. Martin, A. S. Aniceto, H. Ahonen, G. Pedersen, and U. Lindstrøm, “Humpback Whale (Megaptera novaeangliae) Song on a Subarctic Feeding Ground,” Front. Mar. Sci., vol. 8, no. May, pp. 1–7, 2021.

S. Loranger, G. Pedersen, and A. E. A. Blomberg, “A model for the fate of carbon dioxide from a simulated carbon storage seep,” Int. J. Greenh. Gas Control, vol. 107, p. 103293, May 2021. https://doi.org/10.1016/j.ijggc.2021.103293

E. Ona, G. Zhang, G. Pedersen, and E. Johnsen. "In situ calibration of observatory broadband echosounders". ICES Journal of Marine Science, 2020. https://doi.org/10.1093/icesjms/fsaa177

A. S. Aniceto,  G. Pedersen,  R. Primicerio,  M. Biuw, U. Lindstrøm, and L. Camus. "Arctic marine data collection using oceanic gliders: providing ecological context to cetacean vocalizations". Front. Mar. Sci., 2020. doi: 10.3389/fmars.2020.585754' 

Boswell, K. M., Pedersen, G., Taylor, J. C., LaBua, S., Patterson, W. F. (2020). Examining the relationship between morphological variation and modeled broadband scattering responses of reef-associated fishes from the Southeast United States. Fisheries Research, Volume 228. https://doi.org/10.1016/j.fishres.2020.105590.

Zhang, G., Forland, T. N., Johnsen, E., Pedersen, G., & Dong, H. (2020). Measurements of underwater noise radiated by commercial ships at a cabled ocean observatory. Marine Pollution Bulletin, 153, 110948. https://doi.org/10.1016/j.marpolbul.2020.110948 

Strand, K. O., Breivik, Ø., Pedersen, G., Vikebø, F. B., Sundby, S., & Christensen, K. H. (2020). Long‐Term Statistics of Observed Bubble Depth Versus Modeled Wave Dissipation. Journal of Geophysical Research: Oceans, 125(2). https://doi.org/10.1029/2019JC015906 

S. Loranger, G. Pedersen, and T. Weber. “Broadband acoustic scattering from oblate hydrocarbon droplets”, Journal of the Acoustical Society of America, 146, 1176, 2019. https://doi.org/10.1121/1.5121699 (citations:0).

R. Kubilius and G. Pedersen. “Relative acoustic frequency response of induced methane, carbon dioxide and air gas bubble plumes, observed laterally”. Journal of the Acoustical Society of America, 140, 2902 (2016); doi: 10.1121/1.4964250. (citations: 1)

M. Bernasconi, R. Patel, L. Nøttestad, G. Pedersen, and A. S. Brierly. “The effect of depth on the target strength of a humpback whale (Megaptera novaeangliae)”. Journal of the Acoustical Society of America 134, 4316- 4322, 2013. (citations: 5)

G. J. Macaulay, H. Peña, S. M. M. Fässler, G. Pedersen, E. Ona. “Accuracy of the Kirchhoff-approximation and Kirchhoff-ray-mode Fish Swimbladder Acoustic Scattering Models”. PLoS ONE 8(5): e64055. doi:10.1371/journal.pone.0064055, 2013. (citations: 11)

G. Pedersen. O. R. Godø, E. Ona, and G. Macauley. ”A revised target strength–length estimate for blue whiting (Micromesistius poutassou): implications for biomass estimates”. ICES Journal of Marine Science, 68: 2222-2228, 2011. (citations: 12)

G. Pedersen, and R. Korneliussen. “The relative frequency response derived from individually separated targets of northeast Arctic cod (Gadus morhua), saithe (Pollachius virens), and Norway pout (Trisopterus esmarkii)”. ICES Journal of Marine Science, 66: 1149-1154, 2009. (citations: 16)

N. O. Handegard, G. Pedersen, and O. Brix. “Estimating tail-beat frequency using split-beam echosounders”. ICES Journal of Marine Science, 66: 1252-1258, 2009. (citations: 22)

G. Pedersen, N. O. Handegard, and E. Ona. “Lateral-aspect target strength measurements of in situ herring (Clupea harengus)”. ICES Journal of Marine Science, 66: 1191-1196, 2009. (citations: 19)

R. Patel, G. Pedersen, and E. Ona. “Inferring the acoustic dead-zone volume by split-beam echo sounder with narrow-beam transducer on a noninertial platform” Journal of the Acoustical Society of America, 125: 698-705, 2009. (citations: 9)

E. Ona, O. R. Godø, H. Handegard, V. Hjellvik, R. Patel, and G. Pedersen. ”Silent research vessels are not quiet”. Journal of the Acoustical Society of America, 121: 145-150, 2007. (citations: 61)

Conference papers with editor review (selected)

G. Pedersen, E. Storheim, L. S. Doksæter, O. R. Godø, and L. A. Ødegaard, “Concurrent passive and active acoustic observations of high-latitude shallow foraging sperm whales and mesopelagic prey layer,” in Citation: Proc. Mtgs. Acoust, 2017, vol. 30, no. 1, p. 010004. https://doi.org/10.1121/2.0001365

Pedersen, G., Falk-Petersen, S., Dunlop, K., Camus, L., Daase, M., Basedow, S. L., Bandara, K., et al. (2019). “Autonomous surface vehicles for persistent acoustic monitoring of zooplankton in a highly productive shelf area,” IEEE Ocean. Symp., Marseille, pp. 1-7.

Camus, L., Pedersen, G., Falk-Petersen, S., Dunlop, K., Daase, M., Aune, M., and Tassara, L. (2019). “Autonomous surface and underwater vehicles reveal new discoveries in the Arctic Ocean,” IEEE Ocean. Symp., Marseille.

Langeland, T., Cooke, J., Fonnes, G., Lampe, O. D., Pedersen, G., Kristiansen, T., Jaccard, P., et al. (2019) « A Data Management Platform for Data Harvesting and Analysis from Autonomous Marine Measurement Platforms”. OCEANS 2019 - Marseille, Marseille, France, 2019, pp. 1-5.

Ødegard, L. A., Pedersen, G., Johnsen, E. “Underwater noise from wind at the High North LoVe Ocean Observatory”. The 5th international conference and exhibition on Underwater Acoustics, Hersonissos, Crete, June 30 to July 5, 2019.

Loranger, S., Blomberg, A. E. A., Pedersen, G., Waarum, I-K., Austeng, A. «Broadband and multibeam observations of subsea releases of CO2”. The 5th international conference and exhibition on Underwater Acoustics, Hersonissos, Crete, June 30 to July 5, 2019.

Moloney, J, Cole, A., Hillis, C., Kowarski, K., MacDonald, B., Pedersen, G., Tassera, L., and Camus, L. “Observer/AMAR G4 Passive Acoustic Monitoring System for Autonomous Maritime Observation”. 2018 IEEE/OES Autonomous Underwater Vehicle Workshop (AUV), Porto, Portugal, 2018, pp. 1-9. doi: 10.1109/AUV.2018.8729796.

Øygard, S. H., Pedersen, G., and Lunde P. “Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory”. 42 Scandinavian Symposium on Physical Acoustics, February 1-4, Geilo, Norway, 6pp., 2019 (in press).

Storheim, E., Yamakawa, A., Sagen, H., Pedersen, G. 2016. «Impact of long distance propagated seismic signals on the soundscape in the Fram Strait. Use of ACOBAR data and PE modelling.”  Acoustic & Environmental Variability, Fluctuations and Coherence, Institute of Acoustics, 12-13 December 2016 – The Möller Centre, Cambridge University, Cambridge CB3 0DE.

Hauge, R., Pedersen, G., Kolltveit, E. “Fish finding with autonomous surface vehicles for the pelagic fisheries”. IEEE Oceans’16, Monterey, California, USA, 19-23 September.

Thomas, P.J., Pedersen, G. , Hide, A., Apostolidis, A. , Huber, C., Hovdenes, J., Tengberg, A., Hall, P. O. J., Atamanchuk, D. Putnam, R., Putnam. J. “Optical gas monitoring in sea water: Robust reliable and highly flexible, OCEANS - Bergen, 2013 MTS/IEEE , vol., no., pp.1,6, 10-14 June 2013.

International conference contributions (selected)

Pedersen, G., Johnsen, E., Ødegaard, L. A., Zhang, G., Grimsbø, E., Macaulay, G., … Hermansen, A. (2019). The Lofoten-Vesterålen Ocean Observatory—A cabled infrastructure for operational acoustical oceanography. The Journal of the Acoustical Society of America, 146(4), 2773–2773. https://doi.org/10.1121/1.5136604

Blomberg, A. E., Loranger, S., Pedersen, G., Waarum, I. K., Eek, E., & Totland, C. (2019). Acoustic determination of CO 2 bubble rise heights during a controlled release experiment. The Journal of the Acoustical Society of America, 146(4), 2773–2773. https://doi.org/10.1121/1.5136606

Pedersen, G., Storheim, E., Sivle, L., Godø, O. R., Ødegaard, L. A. “Concurrent passive and active acoustic observations of high-latitude shallow foraging sperm whales (Physeter macrocephalus) and mesopelagic prey layer”. The Journal of the Acoustical Society of America 141, 3941 (2017); http://doi.org/10.1121/1.4988929.

Pedersen, G. 2016. “Simulation of acoustic backscattering from bubbles and droplets under different shape regimes with implications for underwater detection of leakages using active acoustic sensors”. Journal of the Acoustical Society of America, 140: 3364–3364. Acoustical Society of America, ASA.

Pedersen, G., Peddie, D., Eliassen, I. K., Heggelund, Y., Lied, G. Ø., Korneliussen, R. J. “Sailbuoy Unmanned Surface Vehicle as an active acoustic measurement platform for biomass detection and monitoring; sensor integration, tests, and demonstration mission”. ICES Symposium – Marine Ecosystem Acoustics – Observing the Ocean Interior in Support of Integrated Management, May 25-28, Nantes, France, 2015.

Boswell, K., Pedersen, G., and Taylor, C. “Examining the wide band frequency responses of common reef fishes- comparisons between models and measures”. ICES Symposium – Marine Ecosystem Acoustics – Observing the Ocean Interior in Support of Integrated Management, May 25-28, Nantes, France, 2015.

Kubelius, R., Ona, E., Pedersen, G., and Torkelsen, T. “Lateral aspect acoustic frequency response of adult saithe (Pollachius virens)”. ICES Symposium – Marine Ecosystem Acoustics – Observing the Ocean Interior in Support of Integrated Management, May 25-28, Nantes, France, 2015.

Bernasconi, M., Pedersen, G., Patel, R., Nøttestad, L., and Brierly, A. S. “Advances in the use of active acoustics for detection and conservation of cetaceans”. Watkins Memorial Marine Mammal Bioacoustics Symposium, March 27 – 29, New Bedford Whaling Museum, 2015.

Pedersen, G., Kubelius, R., and Hauge, R. “Acoustic detection and of underwater gas and oil plumes: Effective medium modelling of backscattering by bubble and droplet plumes”. Ocean Outlook, February 19-20, Bergen, Norway, 2015.

Pedersen, G. “Efficient BEM for acoustic scattering with application to fish”. 38th Scandinavian Symposium on Physical Acoustics, February 1-4, Geilo, Norway, 2015.

G. Pedersen, R. Hauge, R. Kubilius, and T. Torkelsen. ”Active Acoustic Detection of Subsea Oil and Gas Leaks; Model Prediction and Measurements”. Journal of the Acoustical Society of America, 135: 2303, 2014.

G. Pedersen, G. J. Macauley, and H. Peña. “Use of efficient boundary integral equation solvers for fish target strength calculation”, ICES Working Group on Fisheries Acoustics, Science and Technology, 2014.

E. Ona and G. Pedersen. “Modelling of sandeel (Ammodytes marinus) target strength”. Underwater Acoustic Measurements: Technologies & Results, 3rd International Conference & Exhibition, Nafplion, Greece 21-26 June, 2009.

Dissertations

G. Pedersen. “Methodology for in situ target strength measurements”. Ph.D. thesis, Department of Physics and Technology, University of Bergen, Bergen, Norway. April 2007

G. Pedersen. “Akustisk strømning”. Cand.scient. thesis, Department of Physics and Technology, University of Bergen, Bergen, Norway. June 2001.