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Water properties and circulation in Arctic Ocean models

Holloway, G; Dupont, F.; Golubeva, E.; Hakkinen, S.; Hunke, E.; Jin, M.; Karcher, M.; Kauker, F.; Maltrud, M.; Maqueda, M.A.M.; Maslowski, W.; Platov, G.; Stark, D.; Steele, M.; Suzuki, T.; Wang, J.; Zhang, J.. 2007 Water properties and circulation in Arctic Ocean models. Journal of Geophysical Research, 112 (C4). C04S03. 10.1029/2006JC003642

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Abstract/Summary

As a part of the Arctic Ocean Model Intercomparison Project, results from 10 Arctic ocean/ice models are intercompared over the period 1970 through 1999. Models' monthly mean outputs are laterally integrated over two subdomains (Amerasian and Eurasian basins), then examined as functions of depth and time. Differences in such fields as averaged temperature and salinity arise from models' differences in parameterizations and numerical methods and from different domain sizes, with anomalies that develop at lower latitudes carried into the Arctic. A systematic deficiency is seen as AOMIP models tend to produce thermally stratified upper layers rather than the "cold halocline", suggesting missing physics perhaps related to vertical mixing or to shelf-basin exchanges. Flow fields pose a challenge for intercomparison. We introduce topostrophy, the vertical component of V x del D where V is monthly mean velocity and del D is the gradient of total depth, characterizing the tendency to follow topographic slopes. Positive topostrophy expresses a tendency for cyclonic "rim currents". Systematic differences of models' circulations are found to depend strongly upon assumed roles of unresolved eddies

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1029/2006JC003642
Programmes: Oceans 2025 > Climate, ocean circulation and sea level
ISSN: 0148-0227
Additional Keywords: ISI REF HIJ AJWOCT07 NISCOCT07 OPM2007 AR0708 JOURNAL THEME 1 LLF1801 OCEANS 2025 OVERSEAS CO-AUTHORS WORLD OCEAN HALOCLINE PARAMETERIZATION ADVECTION LAYER TRANSPORT DYNAMICS SCHEME FLUX ANTARCTIC OCEAN MODEL
NORA Subject Terms: Marine Sciences
Date made live: 08 Oct 2008 12:11
URI: http://nora.nerc.ac.uk/id/eprint/2706

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