"Comparison of the relationships between the Indian temperature anomalies and solar activity (SSN) provides evidence favouring a mechanism that depends not only on the level of sunspot activity but also on solar polarity."and in turn show that this may be related to Svensmark's cosmic ray theory of climate [one of many solar amplification mechanisms described in the scientific literature]:
"Reversal in the polarity of the solar polar magnetic field takes place near the solar activity maximum in each solar cycle, and the large-scale interplanetary magnetic field is an extension of the solar polar magnetic field in space (Smith et al., 1978). It is also known that the large-scale structure of the interplanetary magnetic field is of basic importance for the long-term modulation of galactic cosmic rays (Venkatesan and Badruddin, 1990, Kudela et al., 2000 and Badruddin et al., 2007). There are indications that long-term variability in cosmic ray intensity influences the Earth’s climate (Svensmark and Friis-Christensen, 1997, Kirkby, 2007 and Rao, 2011). Thus, we have studied the Sun–climate relationship by averaging the data over the time scales of solar polarity epoch (peak to peak SSN). Averaged over this time scale, we found a significant improvement in correlation between
and temperature anomalies as compared to decadal and solar activity cycle timescales."