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.

1993

  1. Johannessen OM, Sagen H, Sandven S, Starke KV, Payne S, Engelsen I. Spatial variation in ambient sound level within ice edge eddies. I: Natural Physical Sources of Underwater Sound. 1993. p. 563-571.

1992

  1. Johannessen OM, Sagen H, Nesse Ø, Engelsen I, Sandven S. Ambient noise generation by ice-ocean jets, eddies and tidal current in the marginal ice zone. I: European Conference on Underwater Acoustics. 1992. p. 28-38.

1990

  1. Sagen H, Johannessen OM, Sandven S. The influence of sea ice on ocean ambient sound. In Ice Technology for Polar Operation. I: Ice Technology for Polar Operations, Computational Mechanics Publications. 1990. p. 415-426.

1989

  1. Tjøtta JN, Sagen H, Tjøtta S. Transmission of a sound beam across a two-fluid interface: Numerical results and asymptotic expressions. Journal Acoustical Society of America. 1989;85:24-38.

Other Publications

2006

  1. 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;

2005

  1. Mathisen JP, Sagen H, Stephens R. Metocean measurements in cold regions and ice forecasting system for the Barents Sea. 2005;
  2. Sandven S, Kloster K, Sagen H, Alexandrov V, Gerland S, Hall R, mfl. Cryosat pre-launch cal-val studies of sea ice thickness. 2005.
  3. Sandven S, Haas C, Sagen H, Kloster K, Forsberg R, Alexandrov V. CRYOSAT pre-launch CalVal study for sea ice thickness.(On CD-ROM). the 31-st International Symposium on Remote Sensing of Environment. Global Monitoring for Sustainability and Security. 2005;

2004

  1. Sandven S, Sagen H, Wadhams P, Wilkinson J, Doble M, Haas C, mfl. Sea Ice Thickness Observation System - SITHOS. 2004.

2003

  1. Evensen G, Gaspar P, Johannessen J, Lefevre F, Sagen H, Stephens R, mfl. Envisat monitoring and forecasting services for offshore industry, EMOFOR. 2003.

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.

2001

  1. Sandven S, Laxon SW, Drange H, Lisæter KA, Sagen H, Evensen G. The quantification of the importance of the sea ice budget in the climate system Final report. 2001.
  2. Sagen H, Johannessen OM, Hobæk HH, Hamre T, Sandven S. AMOC Task 3 Report - Simulation of the effect of integrated temperature change on acoustic propagation. 2001.
  3. Johannessen OM, Sandven S, Sagen H, Hamre T, Hobæk HH, Wadhams P, mfl. Acoustic monitoring of the Ocean climate in the Arctic Ocean (AMOC) Final report. 2001.
  4. Johannessen OM, Sagen H, Naugolnykh KA. Concept study of acoustic monitoring of temperature and current changes in the Fram Strait. 2001.

2000

  1. Johannessen OM, Sagen H, Sandven S, Hobæk HH, Hasselmann K, Maier-Reimer E, mfl. Acoustic monitoring of ocean climate in the Arctic (AMOC). Proceedings from the PORSEC conference, Goa, India 5-8 Dec. 2000 and in Proc. of the Fifth European Conference on Underwater Acoustics, ECUA 2000, Lyon, France 2000. 2000;
  2. Johannessen OM, Sagen H, Hobæk HH. Acoustic monitoring of ocean climate in the central Arctic. Scandinavian Symposium on Physical Acoustics, Ustaoset, Norway, 28-31 January 2000. 2000;

1999

  1. Hamre T, Sagen H, Sandven S. Reorganisation of LYBIN. Workpackage 2B Report. Development of a new system structure for SFK (Sjøforsvarets Forsyningskommando) (The Royal Norwegian Navy Material Command). 1999.
  2. Johannessen OM, Sagen H, Hamre T, Hobæk HH, Hasselmann K, Maier-Reimer E, mfl. Acoustic Monitoring of Oceans Climate in the Arctic (AMOC). Proceedings of the International Symposium on Acoustic Tomography and Acoustic Thermometry, 8-9 February, Tokyo Japan, 10 February, Yokosuka Japan, 1999. 1999;

1998

  1. Sagen H. Ambient Noise in the Marginal Ice Zone. 1998.
  2. Hamre T, Sagen H, Sandven S. Reorganisation of LYBIN. Workpackage 2A Report. Development of a new system structure for DFK (Sjøforsvarets Forsynings Kommando), (The Royal Norwegian Navy Material Command). 1998.
  3. Hamre T, Johannessen OM, Wadhams P, Hasselmann K, Bobylev L, Haugen VJ, mfl. AMOC Task 1 Report Compilation and analysis of existing ocean and ice data. 1998.

1997

  1. Hamre T, Sagen H, Sandven S. Reorganisering av LYBIN Arbeidspakke 1 rapport gjennomgang av nåværende LYBIN versjon. 1997.

1994

  1. Johannessen OM, Sagen H, Sandven S, Engelsen I. The influence of grease ice, swell and icebergs on ambient noise. In proceedings Second European conference on underwater acoustics, European Commission. 1994;
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