Read here. Global warming alarmist scientists have claimed (predicted) that atmospheric levels of CO2 drive climatic changes, including changes in rainfall/snowfall. The newest research clearly shows that major natural forces, such as solar cycles, are what determines the varying cycles of precipitation levels.
"Once again we have another real-world example of cyclical solar activity controlling the cyclical nature of precipitation variations, wherein, in the words of the researchers who conducted the study, "higher solar output corresponds to a stronger monsoon, which intensifies the uplift of air mass on the high Tibetan Plateau and strengthens the subsidence of air mass over the Qaidam Basin," while "the reverse is true during the period of lower solar output," so that "high solar activity is correlated with dry climate in the Qaidam Basin and increased precipitation in monsoonal areas.""