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The closure of the ocean mixed layer temperature budget using level-coordinate model fields

Show simple item record Kim, Seung-Bum Fukumori, Ichiro Lee, Tong 2008-09-23T22:20:02Z 2008-09-23T22:20:02Z 2005-10-06
dc.identifier.citation Journal of Atmospheric and Oceanic Technology Vol. 23, p. 840-853, June 2006 en_US
dc.identifier.clearanceno 05-1392
dc.description.abstract Entrainment is an important element of the mixed layer mass, heat, and temperature budgets. Conventional procedures to estimate entrainment heat advection often do not permit the closure of heat and temperature budgets because of inaccuracies in its formulation. In this study a rigorous approach to evaluate the effect of entrainment using the output of a general circulation model (GCM) that does not have an explicit prognostic mixed layer model is described. The integral elements of the evaluation are 1) the rigorous estimates of the temperature difference between mixed layer water and entrained water at each horizontal grid point, 2) the formulation of the temperature difference such that the budget closes over a volume greater than one horizontal grid point, and 3) the apparent warming of the mixed layer during the mixed layer shoaling to account for the weak vertical temperature gradient within the mixed layer. This evaluation of entrainment heat advection is compared with the estimates by other commonly used ad hoc formulations by applying them in three regions: the north-central Pacific, the Kuroshio Extension, and the Niño-3 areas in the tropical Pacific. In all three areas the imbalance in the mixed layer temperature budget by the ad hoc estimates is significant, reaching a maximum of about 4 K yr-1. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher American Meteorological Society en_US
dc.subject mixed layer mass en_US
dc.subject general circulation model (GCM) en_US
dc.subject temperature gradient en_US
dc.title The closure of the ocean mixed layer temperature budget using level-coordinate model fields en_US
dc.type Article en_US

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