Arctic ROOS report

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Arctic ROOS report 2008-2009 By S. Sandven,
NERSC
What has been done within the region during the
last year? What plans does ARCTIC ROOS have for
next year? What long-term plans are there?
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Members
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Main components of Arctic ROOS

• In situ observation systems ship-borne systems,
  moorings, ice buoys, floats and drifters (e.g.
  DAMOCLES)
• Satellite remote sensing polar orbiting
  satellites using active and passive microwave,
  optical and infrared instruments
• Modelling data assimilation, nowcasting, short
  term forecasting, seasonal forecasting, model
  comparison and validation (e.g. MyOCEAN)

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Satellite observations of sea ice

• Well-established for large-scale monitoring of
  ice area and extent

Reference NERSC/NIERSC
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Arctic sea ice drift
Combination of scatterometer (QuikSCAT) and
radiometer (SSM/I)
Grid resolution 62.5 km Daily in
winter Since 1992
In systematic processing
- 3 days lag - 6 days lag - 30 days
lag
Continuity of the time series with the new
Merging ASCAT/SSMI
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CTD sections in the Greenland Sea by IOPAS
Hydrographic surveys
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Ice thickness data from submarines and AUVs
Courtesey Peter Wadhams, UCAM
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Glider experiment in the Fram Strait July
September 2008

• Courtesy E. Fahrbach, AWI

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Glider data example

• Courtesy E. Fahrbach, AWI

Section of temperature 20-27 July 2008
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Ferrybox lines
Norbjørn, NIVA/Akvaplan-niva Trollfjord,
NIVA/Akvaplan-niva Vesterålen,
IMR Norønna, MARlab/NIVA Bergensfjord, NIVA Col
or Fantasy, NIVA Lysbris, GKSS/NIVA
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Ferrybox data
Tromsø Longyearbyen section
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Acoustic Ice Tethered Profiler
(Ref. J.-C. Gascard
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Acoustic tomography in Fram StraitDAMOCLES and
ACOBAR projects

Monitor temperature by measure acoustic travel
times between sources and receivers First
experiment started in August 2008, and will
continue until 2012
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TOPAZ model system Ocean and sea ice model

• One way nested configuration of
• HYCOM model (Bleck, 2002)
• Boundaries conditions from TOPAZ3 (11-16 km)
• 4.5 to 5.5 km grid cell resolution
• 22 hybrid layers
• Atmospheric forcing fields from ERA40 reanalysis
  with 1.125resolution (used for FA as well)
• Tidal forcing on the boundary
• Ice dynamics from elastic viscous plastic model
  (Hunke and Dukowicz, 1997)
• Thermodynamics fluxes from Drange and
  Simonsen,(1996)

TOPAZ3 SST May 1990 week 2
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Sea ice forecasting in the Barents Sea
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Examples of online data presented on
http//arctic-roos.org

• Sea ice data from passive microwave data
  http//arctic-roos.org/observations
• SAR archive for the Barents Sea region
  http//sat.nersc.no/archive/show.php?regionbarent
  s (password required)
• Water quality chlorophyll-a and SST maps
  http//hab.nersc.no/archive.htm
• TOPAZ modelling and forecasting system
  http//topaz.nersc.no/
• Ice forecast in the Fram Strait
  http//topaz.nersc.no/Knut/IceForecast/FramStrait/
  

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Usage of the website
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Conclusion and further work

• Continue the routine field observation activities
  in the Arctic and sub-Arctic seas, and test new
  observing systems, aiming to build up long-term
  data sets for climate studies
• Improve the exploitation of existing and new
  satellite data covering Arctic regions
• Improve ice-ocean forecasting systems including
  validation by increased use of in situ data and
  satellite data
• Implement MyOcean Integrated project (EU FP7)
  where the Arctic is one of the target regions
• Interaction with users of operational
  oceanography services
• Contribute to SAON Sustaining Arctic Observing
  Networks
• Contribute to SIOS Svalbard Integrated Observing
  System