Modeling of the bottom water flow through the Romanche Fracture Zone with a primitive equation model—Part I: Dynamics

International audience This paper investigates the dynamics of the Antarctic Bottom Water (AABW) flow through the Romanche Fracture Zone (RFZ) in a primitive equation model with a high horizontal and vertical resolution. Two examples of flows over simple bathymetries show that a reduced gravity mode...

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Bibliographic Details
Published in:Journal of Marine Research
Main Authors: Ferron, B., Mercier, H., Tréguier, Anne-Marie
Other Authors: Laboratoire de physique des océans (LPO), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2000
Subjects:
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Antarctic
The Antarctic
Antarc*
Online Access:https://hal.science/hal-00267670
https://doi.org/10.1357/002224000763485728
Description
Summary:International audience This paper investigates the dynamics of the Antarctic Bottom Water (AABW) flow through the Romanche Fracture Zone (RFZ) in a primitive equation model with a high horizontal and vertical resolution. Two examples of flows over simple bathymetries show that a reduced gravity model captures the essential dynamics of the primitive equation model. The reduced gravity model is then used as a tool to identify what are the bathymetric structures (sills, narrows) that mostly constrain theAABW flow through the RFZ. When only these structures are represented in the primitive equation model, the AABW flow is shown to be coherent with observations (transports, density and velocity structures)

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