Journal article

The Changing Length of the Warming Period of the Annual Temperature Cycle in the High Latitudes Under Global Warming

John Bye, Klaus Fraedrich, Silke Schubert, Xiuhua Zhu



The mechanism of climate change involves not only an increase in surface temperature but also an adjustment of the global seasons through changes in the timing of the annual temperature cycle. By locating the temperature extrema in monthly temperature records using Lagrangian interpolation in regions where a single maximum and minimum occurs, we define the warming period as the interval between the dates of the temperature minimum and the temperature maximum. The length and mid-point of the warming period are objective measures which can be computed from reanalysis data and from climate model predictions. We have used the 40-year reanalysis dataset from the European Centre for Medium-range W..

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University of Melbourne Researchers


Funding Acknowledgements

The work presented in this paper was made possible by a computer program for analyzing the lag provided by Edilbert Kirk (KlimaCampus, The University of Hamburg). JB gratefully acknowledges support given by Integrated Climate System Analysis and Prediction (CliSAP), Hamburg, in two invited visits to the KlimaCampus, and KF acknowledges support by the Max Planck Society, and John Boland is especially thanked for advice and discussions. The paper was completed whilst JB held a Fellowship at the Hanse Institute for Advanced Study in Delmenhorst, Germany, during the first six months of 2013. The reviewers and the Associate Editor are also thanked for their useful comments, which have greatly improved the presentation of our results.