Cristin-resultat-ID: 1419467
Sist endret: 2. januar 2017, 15:52
Resultat
Rapport
2016

Evaluation of open boundary conditions in ROMS

Bidragsytere:
  • Arne Melsom og
  • Marta Trodahl

Utgiver/serie

Utgiver

Norwegian Meteorological Institute

Serie

MET report
ISSN 2387-4201

Om resultatet

Rapport
Publiseringsår: 2016
Hefte: 20/2016
Antall sider: 23

Klassifisering

Vitenskapsdisipliner

Oseanografi

Emneord

Havmodeller • Randbetingelser • Saltholdighet • Norskekysten

Beskrivelse Beskrivelse

Tittel

Evaluation of open boundary conditions in ROMS

Sammendrag

Results from the operational model for ocean circulation in Norwegian coastal waters, NorKyst-800m, have been compiled on a daily basis since 2012-06-27. The results for salinity and temperature have been compared to cruise data that are available from the Institute of Marine Research (Norway). Generally, the results have a slight cold bias of a few tenths of a degree, and a strong, positive salinity bias of 0.5 – 2 PSU. The purpose of the present study is to examine the role of open boundary conditions (OBCs) for the biases, with a focus on the salinity bias. A set of three 1-year long experiments have been run, differing in the choice of OBCs. We find that the various experiments give contrasting results for salinity, but also to some degree the ocean temperature distribution and the eddy kinetic energy. We conclude that using OBCs from a different source than in the present operational set-up will likely improve the quality of the model results. Our recommendation is that an alternative configuration to today’s operational NorKyst-800m is implemented and run in parallel. When the new implementation is stable and is found to exhibit the improvements that are reported here, this implementation should be the base for future development of the NorKyst-800m configuration. At some point, a complete substitution of today’s operational configuration with the recommended alternative should also be considered.

Bidragsytere

Arne Melsom

  • Tilknyttet:
    Forfatter
    ved Meteorologisk institutt

Marta Trodahl

  • Tilknyttet:
    Forfatter
    ved Matematisk-naturvitenskapelig fakultet ved Universitetet i Oslo
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