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The challenge ahead: Ocean Predictions in the
Arctic Region
Lars Petter Røed*
Presented at the OPNet Workshop 14-15 May 2008, Geilo, Norway
*Also affiliated with Department of Geosciences, University of Oslo, Norway
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Challenge one: The ocean is big
Gre
enla
ndNorway
France
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Challenge two: The eddies are small
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Challenge two: The eddies are small
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Challenge one
• Rossby radius of deformationis small– Range from 2 to 15 km
• Current computer capacity constrainsresolution– Non-eddy resolving– Eddies must be parameterized
• Nesting of smaller areas necessary to capture eddy growth
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Sample: Non eddy resolving model
SST and ice concentration
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Observation (OSI-SAF)
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Eye validation
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Challenge two
• Nesting conditions– Two way nesting
• Assimilation– Observations– Methods
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Challenge two
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Similar eddy structures?
Similar eddy structures?
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Conclusions
• Eddies are small scale, elusive features
• They spawn in one place, grow as they are advected and their effect is felt in a third place
• Energy analyses– Useful to enhance our understanding – Not practical as a predictive tool in its
present form
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