If you look back 2,000 years there is a very clear pattern of warm and cold periods alternating every ~500 years. The last cold period ended around 1650 so assuming that pattern is still in play it will be warming until 2150 however since this is a continuous or wave effect we have already passed the point of rapid increases and are now is a period of slow increases. This pattern accounts for most of the observed recent increased in global temperatures.
INTRODUCTION
Apparently, based initially on a 1975 “first intuition” by an economist (not a climate scientist), politicians have sought to limit global surface warming to 2 deg C above pre-industrial levels by restricting greenhouse gas emissions. To that end, those politicians created the political entity called the Intergovernmental Panel on Climate Change (IPCC), whose sole purpose is to prepare reports to support the politicians’ agendas.
Politicians from around the globe are once again gathering this year to futilely try to reach agreement on how to achieve that goal of limiting global warming to the economist-suggested limit. So, in order to increase public awareness, we’re being bombarded weekly with speculations of pending global-warming gloom and doom. One was a recent article Earth now halfway to UN global warming limit at NewScientist. It included a graph titled “Halfway to hell”, my Figure 1, prepared by chemist Kevin Cowtan. The graph showed that the values of…
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