Analysis of daily temperature fluctuations

We study daily temperature fluctuations over more than 50 yr in two places on the globe that are separated by more than 3000 km. We analyze the temperature fluctuations ΔTi with respect to the mean noon temperature Ti averaged, for each day of the year, over the whole year, ΔTi = Ti − Ti . We find that the ΔTi are correlated and can be characterized for up to at least 103 days by a power law correlation with an exponent α 0.65.