Reversing bottom circulation in the Somali Basin

Lisa Beal, Robert L. Molinari, Teresa K. Chereskin, Paul E. Robbins

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Two sets of direct velocity measurements were taken, concurrent with hydrographic data, in the bottom waters of the northern Somali Basin in June and September, 1995. The velocities indicate a temporal flow reversal in the bottom circulation, which is consistent with the changing density structure between the sections. In June, there is evidence of a southward Deep Western Boundary Current with a transport of 5 Sv. By September, flow close to the boundary is northward, with a transport of 2.6 Sv. Furthermore, the deep density gradient across the interior of the Somali Basin also changes between occupations, implying a cyclonic circulation in June and anticyclonic flow in September. Rossby wave activity is high in this region during the southwest monsoon, yet there is also evidence of a strong barotropic component to the Great Whirl in September, which may cause the reversal in the abyssal circulation.

Original languageEnglish (US)
Pages (from-to)2565-2568
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number16
DOIs
StatePublished - Aug 15 2000
Externally publishedYes

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reversing
abyssal circulation
whirl
basin
western boundary current
monsoons
Rossby wave
planetary waves
velocity measurement
bottom water
occupation
monsoon
gradients
causes
water

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Beal, L., Molinari, R. L., Chereskin, T. K., & Robbins, P. E. (2000). Reversing bottom circulation in the Somali Basin. Geophysical Research Letters, 27(16), 2565-2568. https://doi.org/10.1029/1999GL011316

Reversing bottom circulation in the Somali Basin. / Beal, Lisa; Molinari, Robert L.; Chereskin, Teresa K.; Robbins, Paul E.

In: Geophysical Research Letters, Vol. 27, No. 16, 15.08.2000, p. 2565-2568.

Research output: Contribution to journalArticle

Beal, L, Molinari, RL, Chereskin, TK & Robbins, PE 2000, 'Reversing bottom circulation in the Somali Basin', Geophysical Research Letters, vol. 27, no. 16, pp. 2565-2568. https://doi.org/10.1029/1999GL011316
Beal, Lisa ; Molinari, Robert L. ; Chereskin, Teresa K. ; Robbins, Paul E. / Reversing bottom circulation in the Somali Basin. In: Geophysical Research Letters. 2000 ; Vol. 27, No. 16. pp. 2565-2568.
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