The sea state bias in altimeter estimates of sea level from collinear analysis of TOPEX data Public Deposited

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  • The wind speed and significant wave height (H1/3) dependencies of the sea state is in altimeter estimates of sea level, expressed in the form ∆hSSB=bH1/3, are examined from least squares analysis of 21 cycles of collinear TOPEX data. The bias coefficient b is found to increase in magnitude with increasing wind speed up to about 12 m s–1 and decrease monotonically in magnitude with increasing H1/3. A parameterization of b as a quadratic function of wind speed only, as in the formulation used to produce the TOPEX geophysical data records (GDRs), is significantly better than a parameterization purely in terms of H1/3. However, a four-parameter combined wind speed and wave height formulation for b (quadratic in wind speed plus linear in H1/3) significantly improves the accuracy of the sea state bias correction. The GDR formulation in terms of wind speed only should therefore be expanded to account for a wave height dependence of b. An attempt to quantify the accuracy of the sea state bias correction ∆hSSB concludes that the uncertainty is a disconcertingly large 1% of H1/3.
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  • Chelton, D.B., 1994, The sea state bias in altimeter estimates of sea level from collinear analysis of TOPEX data. Journal of Geophysical Research, Vol. 99, pg. 24,995–25,008
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  • description.provenance : Approved for entry into archive by Linda Lamb(llamb@coas.oregonstate.edu) on 2010-03-29T23:04:01Z (GMT) No. of bitstreams: 1 Chelton JGR 1994.pdf: 1211356 bytes, checksum: c25dd855eab2507d178abed281dda942 (MD5)
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-03-29T21:57:29Z No. of bitstreams: 1 Chelton JGR 1994.pdf: 1211356 bytes, checksum: c25dd855eab2507d178abed281dda942 (MD5)
  • description.provenance : Made available in DSpace on 2010-03-29T23:04:01Z (GMT). No. of bitstreams: 1 Chelton JGR 1994.pdf: 1211356 bytes, checksum: c25dd855eab2507d178abed281dda942 (MD5) Previous issue date: 1994-12-15
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  • 0148-0227

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