Monsoon-like winds reverse oceanic circulation in the Panama Bight

Andrea Devis-Morales, Wolfgang Schneider, Raúl A. Montoya-Sánchez, Efrain Rodríguez-Rubio

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Seasonal circulation and three-dimensional thermohaline structure within the Panama Bight are examined by employing satellite-derived sea surface winds and dense in-situ hydrographic datasets. The northerly Panama wind jet, associated with a dipole structure of wind stress curl that is positive (negative) on its eastern (western) flank, dominates the bight in winter. This wind jet generates a cyclonic eddy with mean geostrophic velocities of 60 cm s-1, including the poleward flowing coastal Colombia Current, and induces a well pronounced thermocline dome. As a result, temperature (salinity) in the bight is much colder (saltier) than in its surrounding waters. Winds blow from southwesterly directions in summer and the bight is dominated by an anticyclonic eddy associated with a thermocline bowl. Mean geostrophic velocities are on the order of 40 cm s-1 and the Colombia Current is not observed. Temperature (salinity) in the bight is much warmer (fresher) than in its surrounding waters.

Original languageEnglish (US)
Article numberL20607
JournalGeophysical Research Letters
Volume35
Issue number20
DOIs
StatePublished - Oct 28 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • General Earth and Planetary Sciences

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