publication . Article . 2011

AMO AND ICE CORE DATA

Glen Lesins; Chris K. Folland; Henk A. Dijkstra; Petr Chylek; Manvendra K. Dubey;
Open Access
  • Published: 12 Jul 2011 Journal: Geophysical Research Letters, volume 38, pages n/a-n/a (issn: 0094-8276, Copyright policy)
  • Publisher: American Geophysical Union (AGU)
Abstract
[1] Using five ice core data sets combined into a single time series, we provide for the first time strong observational evidence for two distinct time scales of Arctic temperature fluctuation that are interpreted as variability associated with the Atlantic Multidecadal Oscillation (AMO). The dominant and the only statistically significant multidecadal signal has a time scale of about 20 years. The longer multidecadal variability of 45–85 years is not well defined and none of the time scales in this band is statistically significant. We compare these observed temperature fluctuations with results of coupled climate model simulations (HadCM3 and GFDL CM2.1). Both...
Subjects
arXiv: Physics::Geophysics
free text keywords: General Earth and Planetary Sciences, Geophysics, Arctic, HadCM3, Geology, Observational evidence, Climate model, Atlantic multidecadal oscillation, Ice core, Climatology
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