Other
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....11118b&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #11118
Other
Scientific paper
From November 1999 to November 2000, an array composed of three moorings was deployed at 10W, as part of the EQUALANT project. Two of the moorings were localized at 0.45° North and South and the other at the equator. They had 4 current meters each, at depths between 745 and 1525 m. The mooring right at the equator had an ADCP at the surface. Although meridional and zonal components of the velocity are of the same amplitude, the meridional component and its associated high frequencies have received little attention. Most studies so far have concentrated on the low frequency fluctuations of the zonal velocity component. We focus here on the high frequency fluctuations (periods shorter than 100 days) which may have an important role in inter-hemispheric water mass exchange and mixing at the equator. Both meridional and zonal components are examined using wavelets, an appropriate method since frequencies vary with the seasonal cycle. Frequencies also vary with depth. Both components exhibit coherent structures which may be interpreted in relation to instability waves, upwelling events and planetary waves.
Bunge L.
Kartavsteff A.
Provost Christine
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