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http://dx.doi.org/10.4217/OPR.2021.43.4.219

Estimation of Sea Surface Height using Pressure-recording Inverted Echo Sounders Data in the Mindanao Current Region  

Hwang, Chorong (Ocean Circulation Research Center, Korea Institute of Ocean Science & Technology)
Min, Hong Sik (Ocean Circulation Research Center, Korea Institute of Ocean Science & Technology)
Jeon, Chanhyung (Department of Oceanography, College of Natural Sciences, Pusan National University)
Kim, Dong Guk (Ocean Circulation Research Center, Korea Institute of Ocean Science & Technology)
Park, Jae-Hun (Department of Ocean Sciences, College of Natural Sciences, Inha University)
Publication Information
Ocean and Polar Research / v.43, no.4, 2021 , pp. 219-227 More about this Journal
Abstract
Sea surface height (SSH) anomalies were estimated from data recorded by four pressure-recording inverted echo sounders (PIESs) in the Mindanao Current region over a duration of 2 years from December 2017 to November 2019. The steric components of SSH anomalies were derived from round-trip acoustic travel times from the sea floor to the sea surface, whereas mass-loading components were derived from bottom pressures. Temporal variabilities in the total (steric and mass-loading) SSH anomalies and the steric component are extremely similar; this result implies that the steric component plays a major role in SSH anomalies in this region. Comparisons of the PIES-derived SSH anomalies with satellite-measured SSH anomalies reveal that the former has less temporal variability. Correlation coefficients between the total SSH anomalies and satellite-measured SSH anomalies are less than 0.85, which is lower than the correlation coefficient between the steric components and satellite-measured SSH anomalies.
Keywords
sea surface height; pressure-recording inverted echo sounders (PIES); satellite altimetry; mindanao current region;
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