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. CAATEX: Coordinated Arctic Acoustic Thermometry Experiment
  2. Marine Data i Arktis: Marine data i Arktis: Fra kartlegging til kunnskap
  3. Ocean Flagship: Ocean Flagship
  4. UNDER-ICE: Arctic ocean under melting ice
  5. 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. UAK: Useful Arctic Knowledge -
  3. NFR-INTAROS: INTEGRATED ARCTIC OBSERVATION SYSTEM (INTAROS)
  4. INTAROS: Integrated Arctic Observation System
  5. ONR-Acoustics: Under-ice Acoustic propagation
  6. ACOBAR: Acoustic Technology for Observing the interior of the Arctic Ocean
  7. DAMOCLES: Developing Arctic Modelling and Observing Capabilities for Long-term Studies

Peer Review Publications and Books

36 total publications.

2021

  1. Chotiros NP, Hope G, Storheim E, Hobæk H, Freitag L, Sagen H. Inversion of surficial sediment thickness from under-ice acoustic transmission measurement. Journal of the Acoustical Society of America. 2021;149(371).

2020

  1. Worcester PF, Dzieciuch MA, Sagen H. Ocean Acoustics in the rapidly changing Arctic. Journal of the Acoustical Society of America. 2020;16(1).
  2. Geyer F, Sagen H, Cornuelle BD, Mazloff M, Vazquez HJ. Using a regional ocean model to understand the structure and variability of acoustic arrivals in Fram Strait. Journal of the Acoustical Society of America. 2020;147(2).

2019

  1. Lee CM, Starkweather S, Eicken H, Timmermans M-L, Wilkinson J, Sandven S, et al. A Framework for the Development, Design and Implementation of a Sustained Arctic Ocean Observing System. Frontiers in Marine Science. 2019;

2018

  1. Hope G. Acoustic propapgation under the Arctic sea-ice. 2018.
  2. Muckenhuber S, Sagen H. GPS data from sea ice trackers deployed in Fram Strait in 2016. Data in Brief. 2018;18.

2017

  1. Sagen H, Worcester PF, Dzieciuch M, Geyer F, Sandven S, Babiker M, et al. Resolution, identification, and stability of broadband acoustic arrivals in Fram Strait. Journal of the Acoustical Society of America. 2017;141(3).
  2. Hope G, Sagen H, Storheim E, Hobæk H, Freitag L. Measured and modeled acoustic propagation underneath the rough Arctic sea-ice. Journal of the Acoustical Society of America. 2017;141.
  3. Dushaw B, Sagen H. 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).

2016

  1. 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).
  2. 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. [Internet]. In: 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
  3. 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).
  4. Dushaw B, Sagen H, Beszczynska-Möller A. 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).
  5. 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).
  6. 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. In: The Acoustic and environmental variability, fluctuations and coherence. 2016.
  7. 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).
  8. Hope G, Hobæk H, Sagen H. GEOMETRY OF ACOUSTIC COMMUNICATION LINKS IN THE ARCTIC. Proceedings of the Institute of Acoustics. 2016;
  9. Storheim E, Yamakawa A, Sagen H, Pedersen G. Impact of long distance propagated seismic signals on the soundscape in the Fram Strait. Use ACOBAR data and PE modeling. In: The Acoustic and environmental variability, fluctuations and coherence. 2016.
  10. Geyer F, Sagen H, Worcester PF, Babiker M, Hope G, Yamakawa A. Soundscape components in the Marginal Ice Zone: identification and quantification. In: The Acoustic and environmental variability, fluctuations and coherence. 2016.
  11. Morozov AK, Webb DC, Ching-Sang C, Worcester PF, Dzieciuch MA, Sagen H, et al. High-efficient tunable sound sources for ocean and bottom tomography, 15 years of operating history. OCEANS. 2016;

Other Publications

2019

  1. Lee CM, Starkweather S, Eicken H, Timmermans M-L, Wilkinson J, Sandven S, et al. A Framework for the Development, Design and Implementation of a Sustained Arctic Ocean Observing System [Internet]. 2019;6. Available from: http://hdl.handle.net/11250/2609560
  2. Howe BM, Miksis-Olds J, Rehm E, Sagen H, Worcester PF, Haralabus G. Observing the Oceans Acoustically. 2019;6.

2013

  1. Mikhalevsky PN, Sagen H, Worcester PF, Baggeroer AB, Orcutt J, Moore SE, et al. Multipurpose Acoustic Networks in the Integrated Arctic Ocean Observing System - AOS 2013. Arctic Observing Summit 2013. 2013;

2011

  1. Sagen H, Sandven S, Haugen SA, Worcester PF, Beszczynska-Möller A, Kemp J, et al. Design and specification of the ACOBAR acoustic array in the Fram Strait. 2011.
  2. Sagen H, Sandven S, Beszczynska-Möller A. Orgelpiper måler havtemperaturen i Arktis. Teknisk Ukeblad. 2011;158(04/3):75.
  3. Sagen H, Sandven S, Fahrbach E, Beszczynska-Möller A, Klatt O, Worcester PF, et al. AOEM deliverable D9 - Final report on design of the acoustic network for acoustic tomography, underwater navigation and passive listening in the Fram Strait. 2011.
  4. Taroudakis M, Skarsoulis E, Papadakis P, Sagen H, Sandven S, Jesus S, et al. Ocean Acoustic Observatories - Concept and spesifications. 2011.

2010

  1. Haugen SA. Acoustic Tomography in the Fram Strait: - Predicted and measured travel times. 2010.
  2. Sagen H, Sandven S, Beszczynska-Möller A, Boebel O, Duda TF, Freitag L, et al. 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/
  3. Haugen SA, Sagen H, Sandven S, Bertino L, Sakov P, Counillon F. Use of acoustic Travel Times for ocean model validation, and assimilation. 2010;
  4. Sagen H, Sandven S, Skarsoulis E, Worcester PF, Beszczynska-Möller A, Bertino L, et al. The fram Strait tomography system for ocean model validation, assimilation, and inversion. IPY - Oslo Science Conference. 2010;
  5. Sagen H, Dumont D, Beszczynska-Möller A, Haugen SA, Sandven S. DAMOCLES deliverable D4.1-06 - Report describing the validation experiment of FRAM strait model. 2010.
  6. Haugen SA, Sagen H, Sandven S, Dzieciuch MA, Worcester PF, Skarsoulis E, et al. Results from the Fram Strait acoustic tomography experiment and system evaluation. 2010.
  7. Sagen H, Sandven S, Worcester PF, Kemp J. Report on Tomography Array ready for deployment. 2010.
  8. Sagen H, Haugen SA, Sandven S. Results of assimilation of acoustic measurements into TOPAZ-3. 2010.
  9. Sandven S, Kahrs HR, Eknes E, Kvingedal B, Bruserud K, Nilsen F, et al. ICESONAR Monitoring of sea ice thickness from a subsea 4D sonar. 2010.
  10. Skarsoulis E, Piperakis G, Kalogerakis M, Sagen H, Haugen SA, Beszczynska-Möller A, et al. 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 [Internet]. 2009;Available from: www.researchmedia.eu
  2. Sagen H. Final Environmental Assessment Report for the ACOBAR acoustic tomography experiment in Fram Strait. 2009.
  3. Spikes C, Labak SJ, Frankel A, Vigeness K, Raposa KV, Schroeder C, et al. Final EAR for the ACOBAR Acoustic tomography experiment in the Fram Strait. 2009.
Nansen Environmental and Remote Sensing Center Logo
Nansen Environmental and Remote Sensing Center
NABIC Logo
Nansen-Bangladesh International Centre for Coastal, Ocean and Climate Studies
Nansen International Environmental and Remote Sensing Center Logo
Nansen International Environmental and Remote Sensing Center
Nansen Environmental Research Center – India Logo
Nansen Environmental Research Center – India
Nansen–Zhu International Research Centre Logo
Nansen–Zhu International Research Centre
Nansen-Tutu Centre for Marine Environmental Research Logo
Nansen-Tutu Centre for Marine Environmental Research