Who do you believe? Today there were two articles on the relation between solar radiance and global warming. In the American Thinker D. Bruce Merrifield writes that the global climate is driven by a variety of solar variations and that CO2 and methane concentrations are a product of heating and cooling rather than a cause of it.
The current 100 year solar radiation cycle may now have reached its peak, and irradiation intensity has been observed to be declining. This might account for the very recent net cessation of emission of green house gases into the atmosphere starting about 1988, in spite of increasing generation of anthropomorphically-sourced industrial-based green house gases.
But in The Daily Telegraph Roger Highfield writes that Professor Lockwood and associates report in the Proceedings of the Royal Society A that “the sun is not responsible for recent global warming.”
The study found that global warming since 1985 has been caused neither by an increase in solar radiation nor by a decrease in the flux of galactic cosmic rays.
Actually the argument is not whether the recent global warming is a result of anthropogenic-forcing, but whether we should do anything about it.
The argument of scientists like Merrifield is that the earth’s climate has experienced huge fluctuations in the past, probably due to solar variations, and that the current warming is nothing to get excited about.
The position of global warming enthusiasts is that the warming over the last century is mainly anthropogenic and that a continuation of the warming is a danger to the planet.