북적도 해류 지역의 PIES 해면고도와 AVISO 위성 해면고도의 비교 연구
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Title
- 북적도 해류 지역의 PIES 해면고도와 AVISO 위성 해면고도의 비교 연구
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Alternative Title
- Comparison of measurements from pressure-recording inverted echo sounders and satellite altimetry in the North Equatorial Current region
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Author(s)
- 전찬형; 박재훈; 김동국; 김응; 전동철; D.Randolph Watts
- KIOST Author(s)
- Kim, Dong Guk(김동국); Kim, Eung(김응)
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Alternative Author(s)
- 전찬형; 박재훈; 김동국; 김응; 전동철
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Publication Year
- 2013-09-30
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Abstract
- Satellite-measured along-track and gridded sea surface height (SSH) anomaly products from AVISO are compared with in situ SSH anomaly measurements from an array of 4 pressure-recording inverted echo sounders (PIESs), which was deployed across the North Equatorial Current in the Western Pacific. PIESs measure bottom pressure (Pbot) and round-trip acoustic travel time from the sea floor to the sea surface (τ). The Pbot and τ measurements are used to estimate, respectively, the mass-loading and steric height variation in SSH anomaly. From Pbot and τ, it is revealed that the mass-loading component is relatively small in this region. Two sets of delayed-time SSH anomaly AVISO products are evaluated: (1) mono-mission Jason-2 along-track product with 9.92-day interval, and (2) “Reference” gridded products with 7-day interval using two satellites sampling from Jason-2 and Cryosat-2. Satellite-measured SSH anomaly, the variation of which is caused by westward-propagating mesoscale eddies and frontal fluctuations bordering subtropical- and tropical-gyres, agrees well with PIES-derived SSH anomaly. Our results confirm that satellite-measured SSH represents well the mesoscale physical processes around the North Equatorial Current.ss the North Equatorial Current in the Western Pacific. PIESs measure bottom pressure (Pbot) and round-trip acoustic travel time from the sea floor to the sea surface (τ). The Pbot and τ measurements are used to estimate, respectively, the mass-loading and steric height variation in SSH anomaly. From Pbot and τ, it is revealed that the mass-loading component is relatively small in this region. Two sets of delayed-time SSH anomaly AVISO products are evaluated: (1) mono-mission Jason-2 along-track product with 9.92-day interval, and (2) “Reference” gridded products with 7-day interval using two satellites sampling from Jason-2 and Cryosat-2. Satellite-measured SSH anomaly, the variation of which is caused by westward-propagating mesoscale eddies and frontal fluctuations bordering subtropical- and tropical-gyres, agrees well with PIES-derived SSH anomaly. Our results confirm that satellite-measured SSH represents well the mesoscale physical processes around the North Equatorial Current.
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/26749
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Bibliographic Citation
- 2013 International workshop-Tropical ocean dynamics and mid-latitudinal phenomena in northwestern Pacific Ocean, pp.1, 2013
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Publisher
- 한국해양과학기술원
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Type
- Conference
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Language
- English
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