Argentina 3 Climatology 3 Cubic polynomials 3 Dry days 3 Inter-decadal variability 3 Interannual variation 3 Linear trends 3 Low pass filters 3 Patagonian coasts 3 Seasonal cycle 3 Spatial and temporal variability 3 Time series analysis 3 Wavelet analysis 3 annual variation 3 decadal variation 3 regional climate 3 seasonal variation 3 spatial variation 3 temporal variation 3 trend analysis 3 twentieth century 3 wavelet analysis 3