Wavelet transforms Atmospheric temperature Surface temperatures Time series 20th-century reanalysis Antarctica Argentina Atmospheric pressure Climate change Climatology Complementary characteristics El Nino-Southern Oscillation Empirical Mode Decomposition Empirical mode decomposition method Information science Isotopes Long-term behavior Mathematical transformations Meteorological observation Multidecadal variability Mutual informations Non-stationary time series Nonlinear analysis Nonlinear time series Office buildings Orcadas temperature Oxygen isotope records Piecewise linear techniques Processing technique Reanalysis