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Firing et al. 1998
Firing, E., Wijffels, S.E. and Hacker, P. (1998). Equatorial subthermocline currents across the Pacific. Journal of Geophysical Research 103: doi: 10.1029/98JC01944. issn: 0148-0227.

Recent sections crossing the equator at nine longitudes from 146 ¿E to 86 ¿W show zonal currents below 400 m similar to those found in a 16-month mean section on 159 ¿W from the Pacific Equatorial Ocean Dynamics (PEQUOD) program in 1982--1983. Most of the new measurements were made with a lowered acoustic Doppler current profiler. Eastward current extrema (North and South Intermediate Countercurrents) are found in all sections about 2¿ from the equator in the depth range 500--1500 m, with the possible exceptions of 146 ¿E, where topography complicates the picture south of the equator, and 150 ¿E, where the sections extend only from 1 ¿S to 2 ¿N. Poleward of the intermediate countercurrents, westward flow is found near 3¿ from the equator in most of the sections. On the equator, from 250--500 m depth, a westward Equatorial Intermediate Current is found in many but not all of the sections. Similarly, it is present in the PEQUOD mean but not in all synoptic sections. Below the intermediate currents and countercurrents, an eastward current near 3000 m was found at and south of the equator in the PEQUOD mean and in the new sections from 150 ¿E to 110 ¿W. Near 4000 m there is westward flow south of the equator in the PEQUOD mean and near the equator in the new sections from 179 ¿E to 135 ¿W. Geostrophic currents calculated from an 8-year mean hydrographic section at 165 ¿E also resemble the PEQUOD mean. Although not conclusive, the evidence presented here indicates that these currents are basin-scale components of the general circulation, perhaps involving vigorous horizontal recirculation in a set of basin-wide elongated gyres within a few degrees of the equator. ¿ 1998 American Geophysical Union

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Abstract

Keywords
Oceanography, Physical, Currents
Journal
Journal of Geophysical Research
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American Geophysical Union
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