Are cosmic rays causing global warming?

Potholer54 on the latest GOP dunderheaded attack on science.


I know the blogs will tell you that that a correlation between cosmic rays and temperature has been shown, and once you believe this it may be hard to convince you of the science. However let’s have a go….

There are two supposed correlations:

Svensmark and Friis Kristensen wrote a paper on a correlation between sunspots and temperature during the 20th century, which they attributed to the varying intensity of cosmic rays with solar activity. However, this turned out to be the result of a mathematical error. Cosmic rays have been measured over the last 50 years and they vary with the 11-year solar cycle. There has been no increase at all, whereas average global temperatures have been increasing.

via Are cosmic rays causing global warming? – YouTube.