Sea surface height variability from satellite altimetry and pressure-recording inverted echo sounders in the north equatorial current region

Title
Sea surface height variability from satellite altimetry and pressure-recording inverted echo sounders in the north equatorial current region
Author(s)
전찬형; 박재훈; 김동국; 김응; 전동철; Randolph D. Watts
KIOST Author(s)
Kim, Dong Guk(김동국)Kim, Eung(김응)
Publication Year
2014-10-23
Abstract
An array of 4 pressure-recording inverted echo sounders (PIESs) was deployed across the North Equatorial Current (NEC) in the Northwestern Pacific Equatorial (NPE) region. The PIES measures bottom pressure and round-trip acoustic travel time from the sea floor to the sea surface. The mass-loading and steric height variations in sea surface height (SSH) anomaly are estimated with the bottom pressure and round-trip acoustic travel time measurements, respectively. In situ SSH anomaly measurements from the PIESs are compared with three sets of satellite-measured SSH anomaly products from AVISO, mono-mission and multi-mission along-track delayed-time products and reference merged (gridded) delayed-time product (Ref-MSLA). Out of the three AVISO products, Ref-MSLA shows the best match with PIES-derived SSH anomaly in the range of 0.68 to 0.78 correlations. Outstanding error-reduced results in Ref-MSLA are accounted for the merging process conducted by AVISO. This work suggests that Ref-MSLA is the preferable data set to investigate the SSH variability in the NPE region than along-track products.e from the sea floor to the sea surface. The mass-loading and steric height variations in sea surface height (SSH) anomaly are estimated with the bottom pressure and round-trip acoustic travel time measurements, respectively. In situ SSH anomaly measurements from the PIESs are compared with three sets of satellite-measured SSH anomaly products from AVISO, mono-mission and multi-mission along-track delayed-time products and reference merged (gridded) delayed-time product (Ref-MSLA). Out of the three AVISO products, Ref-MSLA shows the best match with PIES-derived SSH anomaly in the range of 0.68 to 0.78 correlations. Outstanding error-reduced results in Ref-MSLA are accounted for the merging process conducted by AVISO. This work suggests that Ref-MSLA is the preferable data set to investigate the SSH variability in the NPE region than along-track products.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25928
Bibliographic Citation
PICES 2014 annual meeting, pp.165 - 167, 2014
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

Physical oceanography,Marine security,Marine safety,해양물리,해양방위,해양안전

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