Fair-ish and Balanced-ish
Saturday, March 15, 2003
A New Low in Climate Pseudoscience: Part 3
On the significance of the MWP and little Ice Age, Daly states:
This account of climatic history contains two serious difficulties for the present global warming theory.
1) If the Medieval Warm Period was warmer than today, with no greenhouse gas contribution, what would be so unusual about modern times being warm also?
2) If the variable sun caused both the Medieval Warm Period and the Little Ice Age, would not the stronger solar activity of the 20th century account for most, if not all, of the claimed 20th century warmth?
Both propositions posed a serious threat to continued public acceptance of the climate modeller's catastrophic view of future climate. This is because new findings in solar science suggested that the sun, not greenhouse gases, were the primary driver of 20th century climate trends.
In order to accept this, one must have a pretty skewed view of reality. In modern day climatic science, there are three main variables which effect global tempertures in the century timescale; greenhouse gases, volcano, and solar variability. None of these variables can explain the climate on their own, you need all three. Or as Mann and co-workers say "While the natural (solar and volcanic) forcings appear to be important factors governing the natural variations of temperatures in past centuries, only human greenhouse gas forcing alone ... can statistically explain the unusual warmth of the past few decades".
If one accepts that temperture changes are caused by the sun, greenhouse gases and volcanos, then the existance of a solar induced warm and then cold period in the earths past shouldn't prove to be a problem.