Tropical ocean-atmosphere controls on inter-annual climate variability in the Cretaceous Arctic
Article first published online: 11 FEB 2011
Copyright 2011 by the American Geophysical Union.
Geophysical Research Letters
Volume 38, Issue 3, February 2011
How to Cite
2011), Tropical ocean-atmosphere controls on inter-annual climate variability in the Cretaceous Arctic, Geophys. Res. Lett., 38, L03706, doi:10.1029/2010GL046151., , and (
- Issue published online: 11 FEB 2011
- Article first published online: 11 FEB 2011
- Manuscript Accepted: 21 DEC 2010
- Manuscript Revised: 10 DEC 2010
- Manuscript Received: 11 NOV 2010
 The first annually resolved sedimentary record from the Cretaceous is used to develop time series of inter-annual and decadal scale climate variability from the Arctic Ocean. Analysis of records spanning 1000 years reveals strong periodicities in the quasi-biennial oscillation and El Niño - Southern Oscillation (ENSO) band as well as a 14 year period, which all closely match periodicities typical of modern high latitude climate variability. This supports the view that an Arctic Ocean free of permanent sea ice would be driven by similar forcing to the present state, implicating tropical ocean atmosphere interaction and demonstrating that stratosphere-troposphere coupling likely played a prominent role in the transmission of Cretaceous equatorial climate forcing to polar latitudes as has recently been established for the modern earth system. On the other hand, the prominent ENSO periodicities in our records argue against the hypothesized link between past warm climates and “permanent El Niño” states.