Physics
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3305605o&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 5, CiteID L05605
Physics
16
Oceanography: General: Equatorial Oceanography, Oceanography: General: Diurnal, Seasonal, And Annual Cycles (0438), Oceanography: Physical: Currents, Oceanography: Physical: Fronts And Jets, Oceanography: Physical: General Circulation (1218, 1222)
Scientific paper
Acoustic float data collected near 800 m depth, are used to map zonal mean currents within the Antarctic Intermediate Water (AAIW) tongue in the equatorial Atlantic. Alternating zonal jets of 2° latitudinal width are revealed between 6°S and 6°N. Displacements from profiling floats drifting near 1000 m depth, also reveal similar zonal jets at the base of the AAIW layer. The strongest jets (15 cm s-1 peak) are found at 4°S, 2°S, 0°, 2°N and 4°N. They are coherent longitudinally over order of 3000 km and, poleward of 1°S and 1°N, generally coherent vertically between 800 m and 1000 m. Large seasonal fluctuations exist at both levels: within 1° of equator, AAIW at 800 m flows westward (8 cm s-1 mean) in boreal summer and fall but eastward (3 cm s-1 mean) in winter, whereas the flow at 1000 m is eastward in late fall and winter.
Fratantoni David
Lankhorst Matthias
Ollitrault Michel
Richardson Philip
Zenk Walter
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