Hanne Sagen

Research interests
Sagen is a researcher at the Nansen Environmental and Remote Sensing Center. Her expertise is in applied mathematics specialized within ocean acoustic. Her research interests are focused on using new technologies for observing the Arctic environment, such as acoustic tomography, passive acoustics, floats and gliders. She was deputy-coordinator in the EU projects (AMOC (1998-2001) and ACOBAR (2008-2013)), and she led the follow up ACOBAR II project funded by RCN project.
Sagen has led the development of the acoustic tomography system in the Fram Strait, and coordinated annual ocean/acoustic cruises to the Fram Strait since 2007 (involving open ocean vessel, icebreakers and aircraft missions). Currently, Sagen lead the UNDER-ICE – Arctic Ocean under melting ice; and she is the deputy coordinator of the EU project INTAROS - Integrated Arctic Observation System. Sagen has a strong international network in USA, and Europe within research and technologies.
Sagen is a member of the Acoustical Society of America and she is a member of the Norwegian Scientific Academy for Polar Research. She has served as member in research programmes committees in the Norwegian Research Council, and is a former member of the Norwegian National International Polar Year Committee (2004-2005). She is member of the ITU/WMO/UNESCO-IOC Joint Task Force (JTF) - Green Cables sin 2013 and of the scientific steering committee of the International Quiet Ocean Experiment (SCOR committee) from 2016.She received her Cand.mag. in 1985, Cand. Scient. in 1987 and Dr. Scient. in 1998 in applied mathematics from the University of Bergen, Norway.
Project leader of the following projects
Project deputy leader of the following projects
Peer Review Publications and Books
2018
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GPS data from sea ice trackers deployed in Fram Strait in 2016. Data in Brief. 2018;18..
2017
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The Role of Simulated Small-Scale Ocean Variability in Inverse Computations for Ocean Acoustic Tomography. Journal of the Acoustical Society of America. 2017;142(6)..
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Resolution, identification, and stability of broadband acoustic arrivals in Fram Strait. Journal of the Acoustical Society of America. 2017;141(3).
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Measured and modeled acoustic propagation underneath the rough Arctic sea-ice. Journal of the Acoustical Society of America. 2017;141..
2016
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Time series of temperature in Fram Strait determined from the 2008-2009 DAMOCLES acoustic tomography measurements and an ocean model. Journal of Geophysical Research - Oceans. 2016;121(7)..
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A Comparative Study of Moored/Point and Acoustic Tomography/Integral Observations of Sound Speed in Fram Strait Using Objective Mapping Techniques. Bulletin of The American Meteorological Society - (BAMS). 2016;.
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Identification and quantification of soundscape components in the Marginal Ice Zone. Journal of the Acoustical Society of America. 2016;139(4)..
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Sound speed as a proxy variable to temperature in Fram Strait. Journal of the Acoustical Society of America. 2016;140(1)..
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On the effects of small-scale variability on acoustic propagation in Fram Strait: The tomography forward problem. Journal of the Acoustical Society of America. 2016;140(2)..
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Time series of temperature in Fram Strait determined from the 2008–2009 DAMOCLES acoustic tomography measurements and an ocean model. Journal of Geophysical Research - Oceans. 2016;121(7)..
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A comparative study of moored/point and acoustic tomography/integral observations of sound speed in fram strait using objective mapping techniques. Journal of Atmospheric and Oceanic Technology. 2016;33(10)..
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GEOMETRY OF ACOUSTIC COMMUNICATION LINKS IN THE ARCTIC. Proceedings of the Institute of Acoustics. 2016;.
2015
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Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System. Arctic. 2015;68(5).
Other Publications
2013
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Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System - AOS 2013. Arctic Observing Summit 2013. 2013;
2011
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Orgelpiper måler havtemperaturen i Arktis. Teknisk Ukeblad. 2011;158(04/3):75..
2010
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Acoustic technologies for observing the interior of the Arctic Ocean [Internet]. Ocean Obs´09: Sustained Ocean Observations and Information for Society. 2010;Available from: http://www.oceanobs09.net/
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The fram Strait tomography system for ocean model validation, assimilation, and inversion. IPY - Oslo Science Conference. 2010;
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Tomographic inversions from the Fram Strait 2008-9 experiment. European Conference on Underwater Acoustics (ECUA). 2010;
2009
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New technology reveals the Arctic´s secrets. International Innovation [Internet]. 2009;Available from: www.researchmedia.eu.
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ACOBAR: The Fram Strait Acoustic System for tomography and navigation of gliders. In the abstract book for the VISO workshop 11-12 June 2009 in Tromsø. 2009;.
2008
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Ocean acoustic tomography: Travel-time inversion in the eastern Fram Strait. proceeding for Acoustics´08, Paris. 2008;.