Hanne Sagen

Job Position: 
Research Leader/Senior Researcher
Research Group: 
E-mail: 
Phone: 
+47 93213296
Hanne Sagen Staff Picture

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

  1. HiAOOS: High Arctic Ocean Observation System (HiAOOS)
  2. CAATEX: Coordinated Arctic Acoustic Thermometry Experiment
  3. Marine Data i Arktis: Fra kartlegging til kunnskap
  4. Ocean Flagship: Ocean Flagship
  5. UNDER-ICE: Arctic ocean under melting ice
  6. ACOBAR II: Analysis and publication of results from the Fram Strait tomographic experiment.

Project deputy leader of the following projects

  1. FyB: Float Your Boat
  2. CAPARDUS: Capacity-building in Arctic standardization development
  3. UAK: Useful Arctic Knowledge -
  4. NFR-INTAROS: INTEGRATED ARCTIC OBSERVATION SYSTEM (INTAROS)
  5. INTAROS: H2020: Integrated Arctic Observation System
  6. ONR-Acoustics: Under-ice Acoustic propagation
  7. ACOBAR: Acoustic Technology for Observing the interior of the Arctic Ocean
  8. DAMOCLES: Developing Arctic Modelling and Observing Capabilities for Long-term Studies

Peer Review Publications and Books

44 total publications.

2016

  1. Sagen H, Dushaw B. 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).
  2. Yamakawa A, Sagen H, Babiker M, Worcester PF, Furevik BR. Soundscape Characterization and the Impact of Environmental Factors in the Central Part of the Fram Strait. I: The Acoustic and environmental variability, fluctuations and coherence. 2016.
  3. Dushaw B, Sagen H. 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).
  4. Hope G, Hobæk H, Sagen H. GEOMETRY OF ACOUSTIC COMMUNICATION LINKS IN THE ARCTIC. Proceedings of the Institute of Acoustics. 2016;
  5. Geyer F, Sagen H, Worcester PF, Babiker M, Hope G, Yamakawa A. Soundscape components in the Marginal Ice Zone: identification and quantification. I: The Acoustic and environmental variability, fluctuations and coherence. 2016.
  6. Morozov AK, Webb DC, Ching-Sang C, Worcester PF, Dzieciuch MA, Sagen H, mfl. High-efficient tunable sound sources for ocean and bottom tomography, 15 years of operating history. OCEANS. 2016;
  7. Sagen H, Dushaw B, Skarsoulis E, Dumont D, Dzieciuch MA, Beszczynska-Møller A. Time series of temperature in Fram Strait determined from the 2008-2009 DAMOCLES acoustic tomography measurements and an ocean model. Journal of Geophysical Research (JGR): Oceans. 2016;121(7).
  8. Dushaw B, Sagen H. 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;
  9. Storheim E, Yamakawa A, Sagen H, Pedersen G. Impact of long distance propagated seismic signals on soundscape in the Fram Strait. Use of ACOBAR data and PE modelling. [Internett]. I: Proceedings of the Institute of Acoustics, Vol. 38, Pt. 3. 2016. Available from: https://under-ice.nersc.no/sites/under-ice.nersc.no/files/AEVFC_2016_Storheim_etal.pdf
  10. Geyer F, Sagen H, Hope G, Babiker M, Worcester PF. Identification and quantification of soundscape components in the Marginal Ice Zone. Journal of the Acoustical Society of America. 2016;139(4).
  11. Dushaw B, Sagen H, Beszczynska-Møller A. Sound speed as a proxy variable to temperature in Fram Strait. Journal of the Acoustical Society of America. 2016;140(1).

2015

  1. Mikhalevsky PN, Sagen H, Worcester PF, Baggeroer AB, Orcutt J, Moore SE, mfl. Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System. Arctic. 2015;68(5).
  2. Menze S. Estimating fin whale distribution from ambient noise spectra using Bayesian inversion. 2015.

2014

  1. Tollefsen D, Sagen H. Seismic exploration noise reduction in the marginal ice zone. Journal of the Acoustical Society of America. 2014;136(1).
  2. Sandven S, Sagen H, Bertino L, Beszczynska-Møller A, Fahrbach E, Worcester PF, mfl. The Fram Strait integrated observing and modelling system. I: Sustainable Operational Oceanography - Proceedings of the Sixth International Conference on EuroGOOS 4–6 October 2011, Sopot, Poland. 2014.

2011

  1. Dumont D, Squire V, Sandven S, Sagen H, Bertino L. Forecasting Waves-in-ice for Arctic Operators. Exploration and Production: Oil and Gas Review [Internett]. 2011;9. Available from: http://www.touchoilandgas.com/forecasting-waves-arctic-operators-a8824-1.html

2010

  1. Haugen SA. Acoustic Tomography in the Fram Strait: - Predicted and measured travel times. 2010.

2003

  1. Johannessen OM, Sagen H, Sandven S, Stark KV. Hotspots in Ambient Noise Caused by Ice Edge Eddies in the Greenland Sea and the Barents Sea. IEEE Journal of Oceanic Engineering. 2003;28:212-228.

2002

  1. Johannessen OM, Sagen H, Hamre T, Hobæk HH, Hasselmann K, Maier-Reimer E, mfl. Acoustic Monitoring of Ocean Climate in the Arctic (AMOC). I: Referee paper in "Operational oceanography - Implementation at the european and regional scales. proceedings of the 2nd EuroGOOS International Conference, Rome, 11-13 March, 1999. Elsevier Oceanography Series. 2002.

1998

  1. Sagen H. Ambient Noise in the Marginal Ice Zone. 1998.

Other Publications

2010

  1. Sandven S, Kahrs HR, Eknes E, Kvingedal B, Bruserud K, Nilsen F, mfl. ICESONAR Monitoring of sea ice thickness from a subsea 4D sonar. 2010.
  2. Skarsoulis E, Piperakis G, Kalogerakis M, Sagen H, Haugen SA, Beszczynska-Möller A, mfl. Tomographic inversions from the Fram Strait 2008-9 experiment. European Conference on Underwater Acoustics (ECUA). 2010;

2009

  1. Sandven S, Sagen H. New technology reveals the Arctic´s secrets. International Innovation [Internett]. 2009;Available from: www.researchmedia.eu
  2. Spikes C, Labak SJ, Frankel A, Vigeness K, Raposa KV, Schroeder C, mfl. Final EAR for the ACOBAR Acoustic tomography experiment in the Fram Strait. 2009.
  3. Sagen H. Final Environmental Assessment Report for the ACOBAR acoustic tomography experiment in Fram Strait. 2009.
  4. Sagen H, Sandven S, Haugen SA, Beszczynska-Möller A, Fahrbach E. 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

  1. Sandven S, Sagen H, Haugen SA, Wåhlin J, Lind JS, Myking S, mfl. The Fram Strait tomography experiment 2008. 2008.
  2. Skarsoulis E, Piperakis G, Kalogerakis M, Sagen H. Ocean acoustic tomography: Travel-time inversion in the eastern Fram Strait. proceeding for Acoustics´08, Paris. 2008;
  3. Sagen H, Sandven S, Worcester PF, Dzieciuch MA, Skarsoulis E. The Fram Strait acoustic tomography system. proceeding for Acoustics´08, Paris. 2008;
  4. Sagen H, Sandven S, Lind JS, Marini C, Lisæter KA, Bertino L. Preparing for assimilation of acoustic data into an ice-ocean coupled model using EnKF. 2008.

2007

  1. Sandven S, Bertino L, Lisæter KA, Sagen H, Lygre K, Babiker M. Review of air-ice-ocean processes in the Marginal Ice Zone of importance for offshore activities in the Barents Sea region. 2007.
  2. Abrahamsen J, Fossan K, Dzieciuch MA, Kemp J, Sagen H, Sandven S, mfl. Plan for eastern Fram Strait tomography experiment and plan for downloading acoustic data. 2007.
  3. Sagen H, Sandven S, Skarsoulis E, Piperakis G, Kalogerakis M, Worcester PF. DAMOCLES: The Fram Strait Acoustic tomography system. Proc. Int. Conf. Underwater Acoustic Measurements, J. Papadakis and L. Bjørnø (Eds.), Heraklion 2007. 2007;
  4. Abrahamsen J, Fossan K, Dzieciuch MA, Green L, Horwitt D, Kemp J, mfl. DAMOCLES deliverable D8.2-02. Technically tested acoustic tomography source and one receiver array with acoustic modems and moorings. 2007.

2006

  1. Sandven S, Sagen H, Wadhams P, Wilkinson J, Doble M, Meldrum DT, mfl. SITHOS: Report and data analysis from the Field experiments in March-April 2003. 2006.
  2. Sandven S, Sagen H, Wadhams P, Wilkinson JP, Hughes N, Haas C, mfl. Sea Ice thickness Observing System: Report and data analysis on the 2004 and 2005 experiments. 2006.
  3. Abrahamsen J, Kalogerakis M, Papadakis P, Piperakis G, Sagen H, Sandven S, mfl. Specification of the Fram Strait acoustic tomography array. DAMOCLES deliverable D3.1-3. 2006.
  4. Sagen H, Sandven S. Input to a first report on describing the DAMOCLES Acoustic tomography system (Task 3.1). Requirement analysis for data delivery from the tomography arrays defined by assimilation needs (TOPAZ). DAMOCLES deliverable D4.1-2. 2006.
  5. Sagen H, Sandven S, Skarsoulis E, Kalogerakis M, Abrahamsen J, Skagen P, mfl. The Fram Strait Tomography system - A Technical Layout. In the proceeding of DAMOCLES High Technology Instrumetation Training Course, Brest. 2006;
  6. Bertino L, Lisæter KA, Sagen H. The TOPAZ Arctic monitoring and prediction system. Proceedings of the DAMOCLES workshop: Current Problems for operational short range weather, ocean and sea ice forecasting in the Arctic - a user perspective. The Polar Environmental Centre, Tromsø, Norway. 2006;
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