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: 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. 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

43 total publications.

2022

  1. Stallemo A. Upper-ocean hydrography in the Eurasian Basin and its implication on sound speed. [Internett]. 2022. Available from: https://hdl.handle.net/11250/3014836
  2. Røsvik B. Multidisciplinary Moorings in the Arctic and Coastal Areas. University of Bergen. [Internett]. 2022. Available from: https://hdl.handle.net/11250/3001633
  3. Geyer F, Sagen H, Dushaw B, Yamakawa A, Dzieciuch M, Hamre T. A dataset consisting of a two-year long temperature and sound speed time series from acoustic tomography in Fram Strait. Data in Brief. 2022;42.

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(1).
  2. Miksis-Olds JL, Rehm E, Howe BM, Worcester PF, Haralabus G, Sagen H. Envisioning a global multi-purpose ocean acoustic network. Marine Technology Society journal. 2021;55(3).
  3. Storheim E, Sagen H, Geyer F. Analysis of signal propagation in the UNDER-ICE experiment. Proceedings of Meetings on Acoustics (POMA). 2021;44(070031).
  4. Geyer F, Sagen H, Storheim E. A dataset of underwater passive acoustic recordings from a 2-year mooring deployment in Fram Strait (UNDER-ICE). Proceedings of Meetings on Acoustics (POMA). 2021;
  5. Hu S, Sagen H, Storheim E, Chen W, Yin J. Using ice-ocean environment from GECCO reanalysis into Bellhop to better understand sound propagation in the Fram Strait. Proceedings of Meetings on Acoustics (POMA). 2021;4(1).
  6. Lygre K, Hamre T, Monsen F, Olaussen T, Sagen H. Analysis of passive acoustic in situ observing systems in the Arctic Ocean using ARCMAP. Proceedings of Meetings on Acoustics (POMA). 2021;44(070018).

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).

2019

  1. Lee CM, Starkweather S, Eicken H, Timmermans M-L, Wilkinson J, Sandven S, mfl. 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. 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.
  2. 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).
  3. Sagen H, Worcester PF, Dzieciuch M, Geyer F, Sandven S, Babiker M, mfl. Resolution, identification, and stability of broadband acoustic arrivals in Fram Strait. Journal of the Acoustical Society of America. 2017;141(3).

2016

  1. 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).
  2. 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;
  3. 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).
  4. 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

Other Publications

2022

  1. Worcester PF, Badley M, Sagen H. Introduction to the special issue on ocean acoustics in the changing arctic [Internett]. 2022;151. Available from: https://asa.scitation.org/doi/pdf/10.1121/10.0010308

2019

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

2013

  1. Mikhalevsky PN, Sagen H, Worcester PF, Baggeroer AB, Orcutt J, Moore SE, mfl. 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, mfl. 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, mfl. 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, mfl. 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, mfl. Acoustic technologies for observing the interior of the Arctic Ocean [Internett]. Ocean Obs´09: Sustained Ocean Observations and Information for Society. 2010;Available from: http://www.oceanobs09.net/
  3. Sagen H, Sandven S, Skarsoulis E, Worcester PF, Beszczynska-Möller A, Bertino L, mfl. The fram Strait tomography system for ocean model validation, assimilation, and inversion. IPY - Oslo Science Conference. 2010;
  4. Haugen SA, Sagen H, Sandven S, Bertino L, Sakov P, Counillon F. Use of acoustic Travel Times for ocean model validation, and assimilation. 2010;
  5. Haugen SA, Sagen H, Sandven S, Dzieciuch MA, Worcester PF, Skarsoulis E, mfl. Results from the Fram Strait acoustic tomography experiment and system evaluation. 2010.
  6. Sagen H, Haugen SA, Sandven S. Results of assimilation of acoustic measurements into TOPAZ-3. 2010.
  7. 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.
  8. Sagen H, Sandven S, Worcester PF, Kemp J. Report on Tomography Array ready for deployment. 2010.
  9. 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.
  10. 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
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