From The Hockey Schtick
A paper published Tuesday in the Journal of Climate finds tiny variations in solar activity over 11-year solar cycles have greatly amplified effects upon climate via changes in the Arctic Oscillation, North Pacific sea surface temperatures & sea level pressure, and via changes in stratospheric ozone from solar UV. The authors find the Arctic Oscillation evolves from a negative mode a few years before solar maximums to a positive mode at and following solar maximums. The IPCC claims the tiny variations in solar activity during solar cycles cannot affect climate, but this paper and many others demonstrate solar activity has greatly amplified effects upon climate via ocean oscillations, atmospheric oscillations such as the Madden-Julian oscillation and Quasi-biennial oscillation, stratospheric ozone, and sunshine hours/clouds.
Here is the paper:
Journal of Climate 2013 doi: http://dx.doi.org/10.1175/JCLI-D-12-00843.1
The surface climate response to 11-yr solar forcing during northern winter is first re-estimated by applying a multiple linear regression (MLR) statistical model to Hadley Centre sea level pressure (SLP) and sea surface temperature (SST) data over the 1880-2009 period. In addition to a significant positive SLP response in the North Pacific found in previous studies, a positive SST response is obtained across the midlatitude North Pacific. Negative but insignificant SLP responses are obtained in the Arctic. The derived SLP response at zero lag therefore resembles a positive phase of the Arctic Oscillation (AO). Evaluation of the SLP and SST responses as a function of phase lag indicates that the response evolves from a negative AO-like mode a few years before solar maximum to a positive AO-like mode at and following solar maximum. For comparison, a similar MLR analysis is applied to model SLP and SST data from a series of simulations using an atmosphere-ocean general circulation model. The simulations differed only in the assumed solar cycle variation of stratospheric ozone. It is found that the simulation that assumed an ozone variation estimated from satellite data produces solar SLP and SST responses that are most consistent with the observational results, especially during a selected centennial period. In particular, a positive SLP response anomaly is obtained in the northeastern Pacific and a corresponding positive SST response anomaly extends across the midlatitude North Pacific. The model response versus phase lag also evolves from a mainly negative AO-like response before solar maximum to a mainly positive AO response at and following solar maximum.