Natural Hazards

, Volume 65, Issue 1, pp 991–997 | Cite as

Oscillations of sea level rise along the Atlantic coast of North America north of Cape Hatteras

Short Communication

Abstract

It is shown in the short comment that the sea levels are oscillating about a longer-term trend and that the sea level rise (SLR) computed with time windows of 20, 30 or 60 years also oscillates, with the amplitude of these latter oscillations reducing as the time window increases. The use of only two values of the SLR distribution is misleading to infer conclusions about the accelerating behaviour. In particular, the comparison of the 30-year SLR 1950–1979 with the 30-year SLR 1980–2009 for the tide gauges along the Atlantic coast of North America north of Cape Hatteras to infer an accelerating behaviour is particularly wrong because the 30-year time window is a too short interval to appreciate the longer-term sea level trend cleared of the multi-decadal oscillations, and the two values from the SLR distribution are computed, respectively, at the times of a valley and a peak for the 60-year Atlantic Ocean multi-decadal oscillation. By using a 60-year time window or all the data since opening when more than 60 years of recording are available and by analysing the SLR time history, the only conclusion that can be inferred from the analysis of the tide gauges along the North American Atlantic coast is that the sea levels are oscillating without too much of a positive acceleration along their longer-term trend.

Keywords

Sea level rise Sea level acceleration Decadal and multi-decadal oscillations Tide gauges Atlantic Ocean North America 

References

  1. Burton D (2012) The point of the bill is to conform policy to science. www.burtonsys.com/climate/Reply_to_Chameides_2012-06-08.html#howlong. Accessed 19 June 2012
  2. National Oceanic and Atmospheric Administration (2001) Sea level variations of the United States 1854–1999. Technical Report NOS CO-OPS 36. tidesandcurrents.noaa.gov/publications/techrpt36doc.pdf. Accessed 19 June 2012
  3. National Oceanic and Atmospheric Administration (2009) Sea level variations of the United States 1854–2006. Technical Report NOS CO-OPS 53. tidesandcurrents.noaa.gov/publications/Tech_rpt_53.pdf. Accessed 19 June 2012
  4. National Oceanic and Atmospheric Administration (2012a), MSL sea level trend for the United States. tidesandcurrents.noaa.gov/sltrends/msltrendstable.htm. Accessed 19 June 2012
  5. National Oceanic and Atmospheric Administration (2012b) Mean Sea Level Trends for Global Network Stations. tidesandcurrents.noaa.gov/sltrends/sltrends_global.shtml. Accessed 19 June 2012
  6. Permanent Service on Mean Sea Level (2012) Data and station information for the battery, NY. www.psmsl.org/data/obtaining/rlr.monthly.data/1896.rlrdata. Accessed 19 June 2012
  7. Sallenger AH Jr, Doran KS, Howd PA (2012) Hotspot of accelerated sea-level rise on the Atlantic coast of North America. Nat Clim Chang. doi:10.1038/nclimate1597 Google Scholar
  8. Tisdale B (2012) Cooling that Atlantic Coast sea level hotspot. wattsupwiththat.com/2012/06/29/cooling-that-east-coast-sea-level-hotspot/. Accessed 19 June 2012

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.University of BallaratBallaratAustralia

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