TY - JOUR
T1 - Inverted Echo Sounder Measurement of Dynamic Height Through an ENSO Cycle in the Central Equatorial Pacific
AU - Wimbush, Mark
AU - Donohue, Kathleen A.
AU - Chiswell, Stephen M.
AU - Lukas, Roger
PY - 1990/10
Y1 - 1990/10
N2 - A four-year record from an inverted echo sounder, deployed near Palmyra Island at 6—N in the central Pacific Ocean, is compared with a simultaneous record of subsurface pressure from this island's lagoon. A factor m, converting round-trip acoustic travel time to surface dynamic height relative to a deep pressure level, was estimated from the ratio of the spectra of the two records in the energetic synoptic oscillation band. Year-to-year variation in m was not statistically significant. For the overall record, m was found to be - 70 — 8 dyn m s-1, where the error bounds represent a 90% confidence interval. This is consistent with first-baroclinic-mode excitation.
AB - A four-year record from an inverted echo sounder, deployed near Palmyra Island at 6—N in the central Pacific Ocean, is compared with a simultaneous record of subsurface pressure from this island's lagoon. A factor m, converting round-trip acoustic travel time to surface dynamic height relative to a deep pressure level, was estimated from the ratio of the spectra of the two records in the energetic synoptic oscillation band. Year-to-year variation in m was not statistically significant. For the overall record, m was found to be - 70 — 8 dyn m s-1, where the error bounds represent a 90% confidence interval. This is consistent with first-baroclinic-mode excitation.
KW - ENSO
KW - Inverted echo sounder
KW - acoustic travel time
KW - dynamic height
UR - http://www.scopus.com/inward/record.url?scp=0025502574&partnerID=8YFLogxK
U2 - 10.1109/48.103534
DO - 10.1109/48.103534
M3 - Article
AN - SCOPUS:0025502574
SN - 0364-9059
VL - 15
SP - 380
EP - 383
JO - IEEE Journal of Oceanic Engineering
JF - IEEE Journal of Oceanic Engineering
IS - 4
ER -