Corals track past Hurricanes

Dullo, Wolf-Christian and Latif, Mojib (2008) Corals track past Hurricanes IFM-GEOMAR Annual Report, 2007 . pp. 22-24.

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The strong hurricane activity observed during the last decade fuelled the debate whether global warming is a major force. The crux of the recent debate is the limited length of the reliable instrumental record that exacerbates the detection of possible long-term changes in hurricane activity, which naturally exhibits strong multidecadal variations in association with the Atlantic Multidecadal Oscillation (AMO). We analysed the stable oxygen (δ18O) of a Caribbean brain coral which records both hurricane activity and AMO. This proxy record is equally sensitive to variations in sea surface temperature (SST) and seawater δ18O, with the latter being strongly linked to precipitation and evaporation. The SST and precipitation signals in the coral provide the longest continuous proxybased record of hurricane activity that interestingly exhibits a long-term increase over the last century.

Document Type: Article
Keywords: Hurricanes, global warming, globale Erwärmung, Coral, Korallen
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: No
Date Deposited: 05 Oct 2012 05:53
Last Modified: 16 Oct 2018 13:27

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