Equatorial currents at 1000 m in the Atlantic Ocean

Details Equatorial currents at 1000 m in the Atlantic Ocean Equatorial currents at 1000 m in the Atlantic Ocean

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..361m&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 3, p. 361-364

Physics

5

Oceanography: General: Equatorial Oceanography, Oceanography: Physical: Currents

Scientific paper

Twenty-seven Profiling ALACE (PALACE) floats were deployed in the equatorial Atlantic during July-August 1997. The floats were ballasted to drift at 1000 m for 10 to 14 days, return to the surface while obtaining a temperature profile, transmit data via satellite, and then after one day return to 1000 m. One-year float paths are now available. Floats deployed on the equator were launched into a deep westward jet. The jet extends some 1°-2° north of the equator, with eastward motion observed in floats to the north of 2°N. The equatorial current reverses in the central basin to the east in mid-October and then back to the west in mid-February. Flow to the north also reverses. The short space and time scales contrast with earlier work based on fewer floats that inferred space scales of some 5°-10° in latitude and time scales greater than one year. The new results are consistent with models that indicate that equatorial Rossby waves are the cause of the reversing currents.

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