Volatility in atmospheric temperature variability

الأصل · EN

Using detrended fluctuation analysis (DFA), we study the scaling properties of the volatility time series Vᵢ=| Tᵢ₊₁-Tᵢ| of daily temperatures Tᵢ for ten chosen sites around the globe. We find that the volatility is long range power-law correlated with an e xponent γ close to 0.8 for all sites considered here. We use this result to test the scaling performance of several state-of-the art global climate models and find that the models do not reproduce the observed scaling behavior.