Article Type:
Research Article

De-Aliasing of Large-Scale High-Frequency Barotropic Signals from Satellite Altimetry in the Japan/East Sea

Yongsheng Xu Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas, and Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island

Search for other papers by Yongsheng Xu in
Current site
Google Scholar
PubMed Close
,
D. Randolph Watts Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island

Search for other papers by D. Randolph Watts in
Current site
Google Scholar
PubMed Close
, and
Jae-Hun Park Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island

Search for other papers by Jae-Hun Park in
Current site
Google Scholar
PubMed Close
Print Publication:
01 Sep 2008
DOI:
https://doi.org/10.1175/2008JTECHO582.1
Page(s):
1703–1709
Restricted access

Abstract

In the Japan/East Sea, energetic high-frequency large-scale barotropic motions are shown to lead to large aliasing errors in satellite altimetry observations. The combined aliasing from several neighboring and crossing tracks produces artificial mesoscale signals in altimeter-mapped products, significantly changing the map interpretation. The alias can be well suppressed by subtracting the large-scale barotropic motions observed by bottom pressure sensors. By using coastal tide gauge data in the Japan/East Sea, about 78% of the alias source variance can be removed, which offers an alternative way to suppress the alias for other time intervals without bottom pressure measurements.

Corresponding author address: Yongsheng Xu, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station #C1100, Austin, TX 78712-0254. Email: yongsheng@utig.ig.utexas.edu

Abstract

In the Japan/East Sea, energetic high-frequency large-scale barotropic motions are shown to lead to large aliasing errors in satellite altimetry observations. The combined aliasing from several neighboring and crossing tracks produces artificial mesoscale signals in altimeter-mapped products, significantly changing the map interpretation. The alias can be well suppressed by subtracting the large-scale barotropic motions observed by bottom pressure sensors. By using coastal tide gauge data in the Japan/East Sea, about 78% of the alias source variance can be removed, which offers an alternative way to suppress the alias for other time intervals without bottom pressure measurements.

Corresponding author address: Yongsheng Xu, Jackson School of Geosciences, The University of Texas at Austin, 1 University Station #C1100, Austin, TX 78712-0254. Email: yongsheng@utig.ig.utexas.edu

Save
Cover Journal of Atmospheric and Oceanic Technology
Journal of Atmospheric and Oceanic Technology

  • Ducet, N., Le Traon P-Y. , and Reverdin G. , 2000: Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2. J. Geophys. Res., 105 , 19477–19498.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Fukumori, I., Menemenlis D. , and Lee T. , 2007: A near-uniform basinwide sea level fluctuation of the Mediterranean Sea. J. Phys. Oceanogr., 37 , 338–358.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Garrett, C., 1983: Variable sea level and strait flows in the Mediterranean: A theoretical study of the response to meteorology forcing. Oceanol. Acta, 6 , 79–87.

    • Search Google Scholar
    • Export Citation

  • Gille, S. T., and Hughes C. W. , 2001: Aliasing of high-frequency variability by altimetry: Evaluation from bottom pressure recorders. Geophys. Res. Lett., 28 , 1755–1758.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Gille, S. T., Stevens D. P. , Tokmakian R. T. , and Heywood K. J. , 2001: Antarctic Circumpolar Current response to zonally averaged winds. J. Geophys. Res., 106 , 2743–2759.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Lyu, S. J., and Kim K. , 2005: Subinertial to interannual transport variations in the Korea Strait and their possible mechanisms. J. Geophys. Res., 110 .C12016, doi:10.1029/2004JC002651.

    • Search Google Scholar
    • Export Citation

  • Lyu, S. J., Kim K. , and Perkins H. T. , 2002: Atmospheric pressure-forced subinertial variations in the transport through the Korea Strait. Geophys. Res. Lett., 29 .1294, doi:10.1029/2001GL014366.

    • Search Google Scholar
    • Export Citation

  • Morimoto, A., Yanagi T. , and Kaneko A. , 2000: Tidal correction of altimetric data in the Japan Sea. J. Oceanogr., 56 , 31–41.

  • Munk, W. H., and Cartwright D. E. , 1966: Tidal spectroscopy and prediction. Philos. Trans. Roy. Soc. London, 259A , 533–581.

  • Nam, S. H., Lyu S. J. , Kim Y. H. , Kim K. , Park J-H. , and Watts D. R. , 2004: Correction of TOPEX/POSEIDON altimeter data for nonisostatic sea level response to atmospheric pressure in the Japan/East Sea. Geophys. Res. Lett., 31 .L02304, doi:10.1029/2003GL018487.

    • Search Google Scholar
    • Export Citation

  • Park, J-H., and Watts D. R. , 2005: Response of the southwestern Japan/East Sea to the atmospheric pressure. Deep-Sea Res. II, 52 , 1671–1683.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • SSALTO/DUACS, 2001: SSALTO/DUACS User Handbook. SSALTO/DUACS CLS.ED/NT/02.540, version 1, 31 pp. [Available online at http://woce.nodc.noaa.gov/woce_v3/wocedata_2/sat_sl/tpxers/handbook_duacs_uk.pdf.].

  • Stammer, D., Wunsch C. , and Ponte R. M. , 2000: De-aliasing of global high-frequency barotropic motions in altimeter observations. Geophys. Res. Lett., 27 , 1175–1178.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Tierney, C., Wahr J. , Bryan F. , and Zlotnicki V. , 2000: Short-period oceanic circulation: Implications for satellite altimetry. Geophys. Res. Lett., 27 , 1255–1258.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Wahr, J., Molenaar M. , and Bryan F. , 1998: Time variability of the Earth’s gravity field: Hydrological and oceanic effects and their possible detection using GRACE. J. Geophys. Res., 103 , 30205–30229.

    • Crossref
    • Search Google Scholar
    • Export Citation

  • Xu, Y., 2006: Analyses of sea surface height, bottom pressure and acoustic travel time in the Japan/East Sea. Ph.D. thesis, University of Rhode Island, 86 pp.

  • Xu, Y., Watts D. R. , Wimbush M. , and Park J-H. , 2007: Fundamental-mode basin oscillations in the Japan/East Sea. Geophys. Res. Lett., 34 .L04605, doi:10.1029/2006GL028755.

    • Search Google Scholar
    • Export Citation

  • Yanagi, T., Morimoto A. , and Ichikawa K. , 1997a: Co-tidal and co-range charts for the East China Sea and the Yellow Sea derived from satellite altimetric data. J. Oceanogr., 53 , 303–309.

    • Search Google Scholar
    • Export Citation

  • Yanagi, T., Takao T. , and Morimoto A. , 1997b: Co-tidal and co-range charts in the South China Sea derived from satellite altimetry data. La Mer, 35 , 85–93.

    • Search Google Scholar
    • Export Citation
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 246 102 5
PDF Downloads 131 37 3