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040 _aEC-PaCDF
_bspa
_cEC-PaCDF
041 _aeng
082 0 4 _223
_a551.462
100 1 _aCollins, C.
_eautor
245 1 0 _aStructure of ocean circulation between the Galápagos Islands and Ecuador /
_cC. Collins, A. Mascarenhas and R. Martinez.
260 3 _c2013.
300 _a: 3-12 p.
520 0 _aFrom 27 March to 5 April 2009, upper ocean velocities between the Galapagos Islands and Ecuador were measured using a vessel mounted ADCP. A region of posible strong cross-hemisphere exchange was observed immediately to the east of the Galapagos, where a shallow (200 m) 300 km wide northeastward surface flow transported 7–11 Sv. Underlying this strong northeastward surface current, a southward flowing undercurrent was observed which was at least 600 m thick, 100 km wide, and had an observed transport of 7–8 Sv. Next to the Ecuador coast, the shallow (<200 m) Ecuador Coastal Current was observed to extend offshore 100 km with strongest flow, 0.33 ms-1, near the surface. Immediately to the west of the Ecuador Coastal Current, flow was directed eastward and southward into the beginnings of the Peru-Chile Countercurrent. The integral of the surface currents between the Galapagos and Ecuador agreed well with observed sea level differences. Although the correlation of the sea level differences with large scale climate indices (Niño3 and the Southern Oscillation Index) was significant, more than half of the sea level variability was not explained. Seasonal variability of the sea level difference indicated that sea level was 2 cm higher at the Galapagos during late winter and early spring, which could be associated with the pattern of northward surface flows observed by R/V Knorr.
546 _aInglés
653 _aStructure
653 _aEstructura
653 _aOcean circulation
653 _aCirculación oceánica
653 _aGalapagos Islands
653 _aIslas Galápagos
700 1 _aMascarenhas, A.
_eautor
700 1 _aMartinez, R.
_eautor
773 0 _gVol. 33 (2013), p. 3-12
_tAdvances in Geosciences.
856 _uhttp://dx.doi.org/10.5194/adgeo-33-3-2013
942 _2ddc
_cARTICLE
999 _c13076
_d13076