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 (ηtot). Comparisons of ηtot with Mono-SLA revealed that hump artifact errors significantly contaminate the Mono-SLA. Differences of ηtot 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 ηtot 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
AVISO (2012) DT CorSSH and DT SLA Product Handbook. CLS-DOS-NT-08.341
AVISO (2013) SSALTO/DUACS user handbook: (M)SLA and (M)ADT near-real time and delayed time products. CLSDOS-NT-06-034
AVISO (2014) A new version of SSALTO/Duacs products available in April 2014. https://www.aviso.altimetry.fr/fileadmin/documents/data/duacs/Duacs2014.pdf Accessed 20 Sep 2017
AVISO (2016a) OSTM/Jason-2 Products Handbook. SALP-MUM-OP-15815-CN
AVISO (2016b) SSALTO/DUACS user handbook: (M)SLA and (M)ADT near-real time and delayed time products. CLSDOS-NT-06-034
AVISO (2017) OSTM/Jason-2 Products Handbook. SALP-MUM-OP-15815-CN
Baker-Yeboah S, Watts DR, Byrne DA (2009) Measurements of sea surface height variability in the eastern South Atlantic from pressure sensor-equipped inverted echo sounders: baroclinic and barotropic components. J Atmos Ocean Tech 26(12): 2593–2609
Behnisch M, Macrander A, Boebel O, Wolff JO, Schröter J (2013) Barotropic and deep-referenced baroclinic SSH variability derived from Pressure Inverted Echo Sounders (PIES) south of Africa. J Geophys Res-Oceans 118(6):3046–3058
Brown G (1977) The average impulse response of a rough surface and its applications. IEEE T Antenn Propag 25(1):67–74
Chassignet EP, Hurlburt HE, Metzger EJ, Smedstad OM, Cummings JA, Halliwell GR, Bleck R, Baraille R, Wallcraft AJ, Lozano C, Tolman HL, Srinivasan A, Hankin S, Cornillon P, Weisberg R, Barth A, He R, Werner F, Wilkin J (2009) US GODAE: global ocean prediction with the HYbrid Coordinate Ocean Model (HYCOM). Oceanography 22(2):64–75
Chelton DB, Schlax MG, Samelson RM, de Szoeke RA (2007) Global observations of large oceanic eddies. Geophys Res Lett 34(15):L15606
Chelton DB, Schlax MG, Samelson RM (2011) Global observations of nonlinear mesoscale eddies. Prog Oceanogr 91(2):167–216
Dibarboure G, Boy F, Desjonqueres JD, Labroue S, Lasne Y, Picot N, Poisson JC, Thibaut P (2014) Investigating short-wavelength correlated errors on low-resolution mode altimetry. J Atmos Ocean Tech 31(6):1337–1362
Donohue KA, Kennelly MA, Cutting A (2016) Sea surface height variability in Drake Passage. J Atmos Ocean Tech 33(4): 669–683
Fu LL, Chelton D, Le Traon PY, Morrow R (2010) Eddy dynamics from satellite altimetry. Oceanography 23(4):14–25
Fukumori I, Raghunath R, Fu LL (1998) Nature of global largescale sea level variability in relation to atmospheric forcing: a modeling study Ichiro by daily winds and climatological heat fluxes corresponding to the period from January. J Geophys Res- Oceans 103(C3):5493–5512
Gilson J, Roemmich D, Cornuelle B, Fu LL (1998) Relationship of TOPEX/Poseidon altimetric height to steric height and circulation in the North Pacific. J Geophys Res-Oceans 103(C12): 27947–27965
Guinehut S, Le Traon PY, Larnicol G (2006) What can we learn from Global Altimetry/Hydrography comparisons? Geophys Res Lett 33(10):1–5
Hirose N, Takayama K, Moon JH, Watanabe T, Nishida Y (2013) Regional data assimilation system extended to the East Asian marginal seas. Umi to Sora (Sea and Sky) 89(2):43–51
Kim YH, Hwang C, Choi BJ (2015) An assessment of ocean climate reanalysis by the data assimilation system of KIOST from 1947 to 2012. Ocean Model 91:1–22
Mccarthy MC, Talley LD, Roemmich D (2000) Seasonal to interannual variability from expendable bathythermograph and TOPEX/Poseidon altimeter data in the South Pacific subtropical gyre. J Geophys Res-Oceans 105(C8):19535–19550
Park JH, Watts DR, Donohue KA, Tracey KL (2012) Comparisons of sea surface height variability observed by pressure-recording inverted echo sounders and satellite altimetry in the Kuroshio Extension. J Oceanogr 68(3):401–416
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jeon, C., Park, JH., Kim, D.G. et al. Comparison of Measurements from Pressure-recording Inverted Echo Sounders and Satellite Altimetry in the North Equatorial Current Region of the Western Pacific. Ocean Sci. J. 53, 207–213 (2018). https://doi.org/10.1007/s12601-018-0012-4
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12601-018-0012-4