A deep boundary current in the Arabian Basin

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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)653-661
Number of pages9
JournalDeep Sea Research Part A, Oceanographic Research Papers
Volume38
Issue number6
DOIs
StatePublished - Jun 1991

ASJC Scopus subject areas

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

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