In answer to the OP: Yes, he is all wet.
Here is a part of the Wikipedia entry
Abdusamatov claims that global warming results not from the emission of greenhouse gases into the atmosphere, but from an unusually high level of solar radiation and a lengthy - almost throughout the last century - growth in its intensity.". This view contradicts the scientific consensus on climate change. Abdusamatov also contends that even the natural greenhouse effect does not exist, stating "Ascribing 'greenhouse' effect properties to the Earth's atmosphere is not scientifically substantiated." He further states that "Heated greenhouse gases, which become lighter as a result of expansion, ascend to the atmosphere only to give the absorbed heat away." The latter statement contradicts measurements of the chemical composition of the atmosphere, while the former violates Fourier's law of heat conduction.
So, not only does he disagree with the consensus on AGW, he doesn't even believe in the natural greenhouse effect (which you can literally demonstrate the existence of with a back-of-the-envelope calculation) and he believes things about the chemical composition of the atmosphere that contradict measurements of it.
It is also worth noting that his views on the relation of the sun and AGW to the current warming do not seem to have been published in any sort of refereed journal as near as I can find
, which is a very bad sign for a piece of research that some are proposing overturns the research from thousands of peer-reviewed papers.