Solar cyclic variability can modulate winter Arctic climate
Sci Rep. 2018; 8: 4864. Published online 2018 Mar 20. doi: 10.1038/s41598-018-22854-0 PMCID: PMC5861038 PMID: 29559646 Indrani Roy Abstract This study investigates the role of the eleven-year solar cycle on the Arctic climate during 1979–2016. It reveals that during those years, when the winter solar sunspot number (SSN) falls below 1.35 standard deviations (or mean value), the Arctic warming extends from the lower troposphere to high up in the upper stratosphere and vice versa when SSN is above. The warming in the atmospheric column reflects an easterly zonal wind anomaly consistent with warm air and positive geopotential height anomalies for years …