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On the different assessments of present velocity and acceleration in a tide gauge record characterized by a quasi-60-year periodic oscillation: comment to “Parker A., oscillations of sea level rise along the Atlantic coast of North America north of Cape Hatteras, natural hazards, in press, accepted manuscript”

Author

Listed:
  • Thomas Watson
  • Alberto Boretti

    (University of Ballarat)

Abstract

The paper describing sea level rise oscillations at Cape Hatteras, USA, by Parker (2012) has opened the discussion regarding if the velocity in a tide gauge record characterized by a quasi-60-year multi-decadal oscillation can be computed by linear fitting of 30 years of data in two ad hoc selected times and if acceleration can then be inferred by comparing these two values as proposed by Sallenger et al. (2012), or if this comparison is meaningless in that the 60-year time window is the minimum amount of time needed to evaluate the velocity in a record characterized by a quasi-60-year multi-decadal oscillation, and the acceleration has then to be computed as the time derivative of this velocity as suggested by Parker (2012a; b). For the specific case of The Battery, NY, it is shown here that the 60-year time window is the minimum time length needed to compute a velocity, and both the 60-year windows and the all data velocities are free of any acceleration at the present time. The 30-year time window velocity of 2009 is not representative of the present sea level rise, and the comparison of the 30-year time window velocity of 2009 and 1979 near a peak and a valley, respectively, of the 60-year multi-decadal oscillation to claim a present acceleration has no scientific background.

Suggested Citation

  • Thomas Watson & Alberto Boretti, 2023. "On the different assessments of present velocity and acceleration in a tide gauge record characterized by a quasi-60-year periodic oscillation: comment to “Parker A., oscillations of sea level rise al," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 119(3), pages 2321-2325, December.
    • Handle: RePEc:spr:nathaz:v:119:y:2023:i:3:d:10.1007_s11069-013-0580-7
    DOI: 10.1007/s11069-013-0580-7
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