Sunspots, Geomagnetic Indices and the Weather: A Cross-Spectral Analysis between Sunspots, Geomagnetic Activity and Global Weather Data

Cross-spectral computations using the time series of Zurich sunspot numbers and seasonal mean temperature and precipitation totals indicate that these series are uncorrelated at individual stations and when grouped together into latitude bands. The same computations with the time series of the geomanetic index Aa and these meteorological series also show no correlation either at individual stations or when grouped together in latitude bands.