Articles | Volume 12, issue 3
Nonlin. Processes Geophys., 12, 345–352, 2005
https://doi.org/10.5194/npg-12-345-2005

Special issue: Nonlinear analysis of multivariate geoscientific data - advanced...

Nonlin. Processes Geophys., 12, 345–352, 2005
https://doi.org/10.5194/npg-12-345-2005

  21 Feb 2005

21 Feb 2005

Holocene climate variability on millennial scales recorded in Greenland ice cores

A. Witt and A. Y. Schumann A. Witt and A. Y. Schumann
  • Nonlinear Dynamics Group, Physics Department, University of Potsdam, PB 601553, 14469 Potsdam, Germany

Abstract. Climate variability is triggered by several solar and orbital cycles as well as by the intern ocean dynamics. Consequently, paleoclimate proxy records are expected to vary on very different time scales ranging from subdecadal to millennial duration. We demonstrate, that Foster's (Foster, 1996) wavelet analysis technique is an appropriate tool for investigating temporarily changing spectral properties of records characterized by awkward sampling quality, which is a typical feature of climate proxy records. By applying it to the Holocene part of different glaciochemical records of Greenland ice cores we proof evidence for a significant contribution of the 1.47 kiloyears cycle over alomst the entire Holocene.