DOI QR코드

DOI QR Code

Sea Level Variations at Kerguelen Island in the South Indian Ocean by the Satellite Data(ARGOS) and Meteorological Data(METEO)

  • Yoon, Hong-Joo (Dept. of Ocean Engineering, Division of Ocean System, Yosu National University)
  • Published : 2000.06.01

Abstract

We studied the sea level variations at Kerguelen island in the South Indian Ocean with ARGOS data and meteorological data during about 1 year(May 1993~April 1994) through using filter, spectral analysis, coherency and phase, and found characteristics for the two oceanic signal levels(detided oceanic signal level, h$_{detided}$ and seasonal oceanic level, h$_{corr.ib}$). The forms of atmospheric pressure variations are good agreed to between ARGOS data and meteorological data in the observed periods. This Kerguelen area shows the inflow of an air temperature(gain of a radiant heat) into the sea water and the stagnation of high atmospheric pressure bands in summer, and the outflow of a sea water temperature(loss of sensible and latent heat) toward the atmosphere and the stagnation of low atmospheric pressure bands in winter. The seasonal difference of sea level between summer and winter is about 1.6cm. Both the detided oceanic signal level(h$_{detided}$) variation and the inverted barometer level(h$_{ib}$) variation have a strong correlation for T>1day period bands. The characteristics of h$_{detided}$ variation are not decided by the influence of any meteorological distributions (atmospheric pressure), but the influence of other factors(bottom water temperature) for T>2days periods bands. h$_{corr.ib}$ plays a very important role of sea level variation in the observed periods (especially T>about 180days period bands).

Keywords

References

  1. J. of Geophysical Research v.95 no.3 Oceanic Tides from Geosat altimetry Cartwright, D. E.;R. D. Ray
  2. J. of Geophysical Research v.91 no.9 Ocean signals in Tide Gauge Records Chelton, D. B.;D. B. Enfield
  3. Deep-sea Res. v.20 The theory of the seasonal variability in the ocean Gill, A. E.;P. P. Miller
  4. Joint Oceanographic Institute The future of Spaceborne Altimetry, ocean and climate change Koblinsky, C. J.;P. gaspar;D. Loyerloet
  5. Oceanol. Act. v.4 no.3 A model of prediction of tidal elevation over the English Channel Le Provost C.
  6. La meteorologi no.40 Le Provost C.
  7. Tides, Surges and Mean Sea Level, Chichester Pugh, D. J.
  8. Geophysical Monography 69 v.Ⅱ Sea level variability in the Crozet- Kerguelen- Amsterdam Area from Bottom Pressure and Geosat Altimetry Park, Y. H.;S. G. bernard
  9. J. of Geophysical Res. v.98 no.7 frontal structure, water Masses, and Circulation in the Crozet basin Park, Y. H.;Gamberoni;E. charriaud
  10. Theory and Application of Digital signal processing Rabiner, L. R.;B. Gold
  11. Climate of the Oceans Climate of the Indian Ocean South of 35°S Taljaard, H. A.;H. von Loon;H. von Loon(ed.)
  12. Climate and Global Change with recommendation Global sea level Change on the decimal to century time scales, Discussion of scientific problem in contex of NOAA's program Welander, P.