Comparison of Measurements from Pressure-recording Inverted Echo Sounders and Satellite Altimetry in the North Equatorial Current Region of the Western Pacific SCIE SCOPUS KCI

Cited 5 time in WEB OF SCIENCE Cited 6 time in Scopus
Title
Comparison of Measurements from Pressure-recording Inverted Echo Sounders and Satellite Altimetry in the North Equatorial Current Region of the Western Pacific
Author(s)
Jeon, Chanhyung; Park, Jae-Hun; Kim, Dong Guk; Kim, Eung; Jeon, Dongchull
KIOST Author(s)
Kim, Dong Guk(김동국)Kim, Eung(김응)
Alternative Author(s)
김동국; 김응; 전동철
Publication Year
2018-06
Abstract
An array of 5 pressure-recording inverted echo sounders (PIESs) was deployed along the Jason-2 214 ground track in the North Equatorial Current (NEC) region of the western Pacific Ocean for about 2 years from June 2012. Round-trip acoustic travel time from the bottom to the sea surface and bottom pressure measurements from PIES were converted to sea level anomaly (SLA). AVISO along-track mono-mission SLA (Mono-SLA), reference mapped SLA (Ref-MSLA), and up-to-date mapped SLA (Upd-MSLA) products were used for comparison with PIES-derived SLA (eta (tot)). Comparisons of eta (tot) with Mono-SLA revealed that hump artifact errors significantly contaminate the Mono-SLA. Differences of eta (tot) from both Ref-MSLA and Upd-MSLA decreased as the hump errors were reduced in mapped SLA products. Comparisons of Mono-SLA measurements at crossover points of ground tracks near the observation sites revealed large differences though the time differences of their measurements were only 1.53 and 4.58 days. Comparisons between Mono-SLA and mapped SLA suggested that mapped SLA smooths out the hump artifact errors by taking values between the two discrepant Mono-SLA measurements at the crossover points. Consequently, mapped SLA showed better agreement with eta (tot) at our observation sites. AVISO mapped sea surface height (SSH) products are the preferable dataset for studying SSH variability in the NEC region of the western Pacific, though some portions of hump artifact errors seem to still remain in them.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/900
DOI
10.1007/s12601-018-0012-4
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.53, no.2, pp.207 - 213, 2018
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Subject
SURFACE HEIGHT VARIABILITY
Keywords
SSH comparison; PIES-derived SSH; along-track and mapped AVISO SSH; hump errors in AVISO SSH; NEC region of the western Pacific
Type
Article
Language
English
Document Type
Article
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