From IOP.Science:- https://iopscience.iop.org/article/10.1088/1674-4527/21/6/131 Abstract In order to evaluate how much Total Solar Irradiance (TSI) has influenced Northern Hemisphere surface air temperature trends, it is important to have reliable estimates of both quantities. Sixteen different estimates of the changes in TSI since at least the 19th century were compiled from the literature. Half of these estimates are…… Continue reading How much has the Sun influenced Northern Hemisphere temperature trends? An ongoing debate.