Just recently, Sloan and Wolfendale published a paper in Environmental Research Letters, called "Testing the proposed causal link between cosmic rays and cloud cover". In the Institute of Physics Press Release, it said, "New research has deal a blow to the skeptics who argue that climate change is all due to cosmic rays rather than man made greenhouse gases". Did it really?
First, we should note that so called "skeptics" like myself or my serious colleagues never claimed that cosmic rays explain all the climate change, it does however explain most of the solar-climate link and a large fraction (perhaps 2/3's of the temperature increase over the 20th century).
Two arguments are based on the expectation for effects which are much larger than should actually be present. In the third argument, they expect to see no phase lag, where one should actually be present.
Sloan and Wolfendale did not raise any argument which bares any implications to the validity or invalidity of the link.
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