Homogeneous record of Atlantic hurricane surge threat since 1923

Aslak Grinsted, John C. Moore, and Svetlana Jevrejeva
PNAS first published October 15, 2012 https://doi.org/10.1073/pnas.1209542109

  1. Edited by Kerry A. Emanuel, Massachusetts Institute of Technology, Cambridge, MA, and approved August 31, 2012 (received for review June 7, 2012)

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Abstract

Detection and attribution of past changes in cyclone activity are hampered by biased cyclone records due to changes in observational capabilities. Here we construct an independent record of Atlantic tropical cyclone activity on the basis of storm surge statistics from tide gauges. We demonstrate that the major events in our surge index record can be attributed to landfalling tropical cyclones; these events also correspond with the most economically damaging Atlantic cyclones. We find that warm years in general were more active in all cyclone size ranges than cold years. The largest cyclones are most affected by warmer conditions and we detect a statistically significant trend in the frequency of large surge events (roughly corresponding to tropical storm size) since 1923. In particular, we estimate that Katrina-magnitude events have been twice as frequent in warm years compared with cold years (P < 0.02).

Footnotes

  • ↵1To whom correspondence should be addressed. E-mail: ag{at}glaciology.net.

  • ↵2Present address: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.

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Atlantic hurricane surge threat since 1923
Aslak Grinsted, John C. Moore, Svetlana Jevrejeva
Proceedings of the National Academy of Sciences Oct 2012, 201209542; DOI: 10.1073/pnas.1209542109
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