A deep boundary current in the Arabian Basin

Gregory C. Johnson; Bruce A. Warren; Donald B. Olson

doi:10.1016/0198-0149(91)90004-Y

A deep boundary current in the Arabian Basin

Gregory C. Johnson, Bruce A. Warren, Donald B. Olson

Ocean Sciences

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Recently collected CTD data are supplemented by historical Nansen bottle data to examine the circulation of bottom water in the Arabian Basin. A deep western-boundary current is observed flowing southeastward below a mid-depth zero-velocity surface along the Carlsberg Ridge. A zero-velocity surface at potential isotherm 1.7°C in chosen on the basis of water-mass properties. However, the origin of the bottom water in the Arabian Basin cannot be determined in a like manner. The bottom water could enter from the Somali Basin through the Owen Fracture Zone, or from the Central Indian Basin through passages in the Chagos-Laccadive Ridge south of the equator. Application of the Stommel-Arons framework for deep-circulation dynamics to the basin suggests that the bottom water is supplied primarily through the Owen Fracture Zone.

Original language	English (US)
Pages (from-to)	653-661
Number of pages	9
Journal	Deep Sea Research Part A, Oceanographic Research Papers
Volume	38
Issue number	6
DOIs	https://doi.org/10.1016/0198-0149(91)90004-Y
State	Published - Jun 1991

ASJC Scopus subject areas

Environmental Science(all)
Earth and Planetary Sciences(all)

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10.1016/0198-0149(91)90004-Y

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title = "A deep boundary current in the Arabian Basin",

abstract = "Recently collected CTD data are supplemented by historical Nansen bottle data to examine the circulation of bottom water in the Arabian Basin. A deep western-boundary current is observed flowing southeastward below a mid-depth zero-velocity surface along the Carlsberg Ridge. A zero-velocity surface at potential isotherm 1.7°C in chosen on the basis of water-mass properties. However, the origin of the bottom water in the Arabian Basin cannot be determined in a like manner. The bottom water could enter from the Somali Basin through the Owen Fracture Zone, or from the Central Indian Basin through passages in the Chagos-Laccadive Ridge south of the equator. Application of the Stommel-Arons framework for deep-circulation dynamics to the basin suggests that the bottom water is supplied primarily through the Owen Fracture Zone.",

author = "Johnson, {Gregory C.} and Warren, {Bruce A.} and Olson, {Donald B.}",

note = "Funding Information: Acknowledgements--SJOeHeN SONe t al. (1991).S upportf or work at sea and subsequenatn alysisa shorew as providedb y the U.S. NationaSl cienceF oundatiounn derg rantsO CE8800135a ndO CE8513825to D.B.O.. by the U.S. Office of Naval Researchu nderc ontracNt (JOOI4-87-K-O001N.R 083-004a ndg rantN O0014-89-J-I076. code 1122POt o B.A.W. and by the U.S. Office of Naval Researchth rougha Secretaroyf the Navy Graduate Fellowshipin Oceanographtoy G.C.J. WHOI ContributioNn o. 7382. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1991",

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doi = "10.1016/0198-0149(91)90004-Y",

language = "English (US)",

volume = "38",

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AB - Recently collected CTD data are supplemented by historical Nansen bottle data to examine the circulation of bottom water in the Arabian Basin. A deep western-boundary current is observed flowing southeastward below a mid-depth zero-velocity surface along the Carlsberg Ridge. A zero-velocity surface at potential isotherm 1.7°C in chosen on the basis of water-mass properties. However, the origin of the bottom water in the Arabian Basin cannot be determined in a like manner. The bottom water could enter from the Somali Basin through the Owen Fracture Zone, or from the Central Indian Basin through passages in the Chagos-Laccadive Ridge south of the equator. Application of the Stommel-Arons framework for deep-circulation dynamics to the basin suggests that the bottom water is supplied primarily through the Owen Fracture Zone.

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A deep boundary current in the Arabian Basin

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