Are secular correlations between sunspots, geomagnetic activity, and global temperature significant?

  title={Are secular correlations between sunspots, geomagnetic activity, and global temperature significant?},
  author={Jeffrey J. Love and Kalevi Mursula and Victor C. Tsai and David M. Perkins},
  journal={Geophysical Research Letters},
Recent studies have led to speculation that solar‐terrestrial interaction, measured by sunspot number and geomagnetic activity, has played an important role in global temperature change over the past century or so. We treat this possibility as an hypothesis for testing. We examine the statistical significance of cross‐correlations between sunspot number, geomagnetic activity, and global surface temperature for the years 1868–2008, solar cycles 11–23. The data contain substantial autocorrelation… 
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