title: The dependence of global ocean modeling on background diapycnal mixing.
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.
authors.affiliation: Key Laboratory of Digital Ocean, State Oceanic Administration, Tianjin 300171, China ; National Marine Data and Information Service, Tianjin 300171, China.
authors.forename: Zengan
authors.identifier: 0000-0003-4531-1622
authors.initials: Z
authors.lastname: Deng
mesh_terms: D057446:Hydrodynamics; D008962:Models, Theoretical; D009792:Oceans and Seas; D013696:Temperature