LONG-RANGE POWER-LAW CORRELATIONS IN CLIMATE CHANGES OVER THE PAST 100000 YEARS Academic Article uri icon

abstract

  • Previous studies indicated weak long-range correlated behavior in daily temperature variations from their annual average. These temperature variations are found to be correlated over a decade. Here we study long-term (more than 100000 years) annual temperature changes reflected by data obtained from four ice-cores (two from the south-pole and two from the north-pole). We perform correlation analysis using the following techniques:(i) uneven sampled Fourier transform technique and (ii) the detrended fluctuation analysis which can eliminate higher order trends from the data. We show that changes in the delta-18O and delta-D (temperature proxies) are strongly long-range correlated over tens of thousands of years. Moreover, we also study the correlation properties of the magnitudes of the increments of climate changes (volatility) and find highly correlated behavior; these …

publication date

  • January 1, 2001