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The Scientific World Journal
Volume 2014 (2014), Article ID 838701, 7 pages
http://dx.doi.org/10.1155/2014/838701
Research Article

The Dependence of Global Ocean Modeling on Background Diapycnal Mixing

1Key Laboratory of Digital Ocean, State Oceanic Administration, Tianjin 300171, China
2National Marine Data and Information Service, Tianjin 300171, China

Received 16 August 2013; Accepted 23 October 2013; Published 22 January 2014

Academic Editors: F. Criado-Aldeanueva and P. Gillet

Copyright © 2014 Zengan Deng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Argo-derived background diapycnal mixing (BDM) proposed by Deng et al. (in publish) is introduced to and applied in Hybrid Coordinate Ocean Model (HYCOM). Sensitive experiments are carried out using HYCOM to detect the responses of ocean surface temperature and Meridional Overturning Circulation (MOC) to BDM in a global context. Preliminary results show that utilizing a constant BDM, with the same order of magnitude as the realistic one, may cause significant deviation in temperature and MOC. It is found that the dependence of surface temperature and MOC on BDM is prominent. Surface temperature is decreased with the increase of BDM, because diapycnal mixing can promote the deep cold water return to the upper ocean. Comparing to the control run, more striking MOC changes can be caused by the larger variation in BDM.