Water properties and circulation in Arctic Ocean models
Article first published online: 7 MAR 2007
Copyright 2007 by the American Geophysical Union.
Journal of Geophysical Research: Oceans (1978–2012)
Volume 112, Issue C4, April 2007
How to Cite
2007), Water properties and circulation in Arctic Ocean models, J. Geophys. Res., 112, C04S03, doi:10.1029/2006JC003642., et al. (
- Issue published online: 7 MAR 2007
- Article first published online: 7 MAR 2007
- Manuscript Accepted: 10 AUG 2006
- Manuscript Revised: 18 JUL 2006
- Manuscript Received: 13 APR 2006
 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×∇D where V is monthly mean velocity and ∇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.