Advertisement

Journal of Geodesy

, Volume 73, Issue 12, pp 638–647 | Cite as

Seasonal sea level change from TOPEX/Poseidon observation and thermal contribution

  • J. L. Chen
  • C. K. Shum
  • C. R. Wilson
  • D. P. Chambers
  • B. D. Tapley
Article

Abstract.

Seasonal steric sea-level change due to temperature variation in the mixing layer is assessed using space-measured sea-surface temperature data and historical in situ temperature measurements. The results are compared with TOPEX/Poseidon satellite altimeter measurement at different large spatial scales. It is indicated that thermal effect accounts for much of the observed seasonal variability, especially when averaging over zonal regions. Some regional seasonal patterns of sea-level anomalies in the tropical oceans are well represented by the thermal model prediction. Systematic differences are shown between TOPEX/Poseidon observation and thermal contribution at a 1–2 cm level. The potential causes for these differences are discussed, including water mass exchanges among the atmosphere, land, and oceans, and error sources in the steric result and geophysical corrections applied in TOPEX/Poseidon data.

Key words: TOPEX/Poseidon – Sea-level change – Thermal effect 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • J. L. Chen
    • 1
  • C. K. Shum
    • 3
  • C. R. Wilson
    • 2
  • D. P. Chambers
    • 1
  • B. D. Tapley
    • 1
  1. 1. Center for Space Research, University of Texas at Austin, 3925 W. Braker Lane, Suite 200, Austin, TX 78759-5321, USA e-mail: chen@csr.utexas.edu; Tel.: +1 512 471 5573; Fax: +1 512 471 3570US
  2. 2. Department of Geological Sciences, University of Texas at Austin, Austin, TX 78759, USAUS
  3. 3. Department of Civil and Environmental Engineering and Geodetic Science, Ohio State University, Columbus, OH, USAUS

Personalised recommendations