The Atlantic North Equatorial Countercurrent
Gustavo Jorge Goni(1) and Carlos Fonseca(2)
4301 Rickenbacker Causeway,
Miami, FL 33149,
(2) University of Miami, 4301 Rickenbacker Causeway, Miami, FL 33149, United States
More than ten years of sea height anomaly fields are used in combination with climatological hydrographic data to investigate the spatial and temporal variability of the North Equatorial Countercurrent (NECC). Results obtained here are compared against those derived from temperature sections obtained from the high density XBT transect AX08 and of the depth of the 20C isotherm derived from PIRATA moorings. A marked shift to the north was observed in the location of the core of the NECC in 1997, which coincides with a similar shift previously observed in the location of the North Brazil Current retroflection. The location of the NECC is observed to have a strong annual and semiannual component with maximum northerly locations in February and August. The geostrophic transport exhibits a predominant annual cycle with maximum values occurring during November.