Using pressure-sensor equipped inverted echo sounder (PIES) to estimate variation in hydrographic field ─ Application to the variability off the east of Taiwan and north east of Luzon
Date Issued
2015
Date
2015
Author(s)
Tsai, Cheng-Ju
Abstract
The influence and fate of westward-propagating eddies that impinge on the Kuroshio were observed with pressure-sensor equipped inverted echo sounders (PIESs) deployed east of Taiwan and northeast of Luzon. Zero-lag correlations observed between PIES-measured acoustic travel times and satellite-measured sea surface height anomalies are negative, consistent with the pycnocline shoaling and deepening beneath sea surface lows and highs, respectively. Correlations have lower magnitude towards the west, suggesting eddy-influence weakens across the Kuroshio. Anticyclones intensify sea surface and pycnocline slopes across the Kuroshio, while cyclones weaken these slopes. During the 6 month period of overlap between the PIES arrays, one anticyclone affected the depth of the pycnocline first at the array northeast of Luzon and 21 days later off Taiwan. Kuroshio response to eddies is complicated due to the variations in eddy strength and shape and due to the simultaneous influences of multiple eddies arriving from different directions.
Subjects
Kuroshio
mesoscale eddy
eddy-western boundary current interactions
pressure-sensor equipped inverted echo sounders
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02241104-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):5697a3295545d8e39da8a7b3d839d084