also found was that the correlation between solar activity and global temperatures ended around 1975, hence recent warming must have some other cause than solar variations.
also found was that the correlation between solar activity and global temperatures ended around 1975, hence recent warming must have some other cause than solar variations.
solar activity and climate:84
scafetta and west correlated solar proxy data and lower tropospheric temperature for the preindustrial era, before significant anthropogenic greenhouse forcing, suggesting that tsi variations may have contributed 50% of the warming observed between 1900 and 2000 (although they conclude "our estimates about the solar effect on climate might be overestimated and should be considered as an upper limit.")