Guest essay by Sheldon Walker
A new website has been created, which offers a new perspective on global warming.
The website is called “mta-graphs.com”
Temperature series like Gistemp or UAH, are turned into 2 dimensional coloured graphs, called global warming contour maps.
A contour map is basically a colour coded collection of thousands of linear regressions. It is mathematically based, and the colour displayed for each trend is determined by the trends rate of warming, as calculated by a linear regression.
A contour map lets you see how the warming rate has changed at different times, and how it varied for different trend lengths. It makes understanding global warming almost as simple as recognising a colour.
The website currently has 27 temperature series from UAH available for viewing. The selections currently available are:
– Northern Hemisphere
– Southern Hemisphere
– Northern Polar
– Northern Extra Tropical
– Southern Extra Tropical
– Southern Polar
– Countries – Australia, USA 48, and USA 49
Most selections are available in “Land and Ocean”, “Land only”, and “Ocean only”. Now you can actually see the difference between how much the Land is warming, and how much the Ocean is warming.
Check out the extreme warming in the Northern Polar temperature series.
Check out the lack of warming in the Southern Polar temperature series.
Other temperature series like Gistemp, Hadcrut4, and Berkeley/BEST, will be added soon.
Because contour maps show how the warming rate has changed over time, they are great for showing the recent Slowdown.
Here are some quick instructions for spotting a Slowdown. On any contour map, look at the colour at the top point of the triangular contour map. This color represents a linear regression done over the full date range of the map. This can be considered to be the “average” warming rate for the whole map.
If the top point is coloured yellow, then this means that the average warming rate was between +1.0 and +2.0 degrees Celsius per century.
If the top point is coloured light-orange, then this means that the average warming rate was between +2.0 and +3.0 degrees Celsius per century.
The warming range for each colour is given in the legend of every contour map.
Light-green means a warming rate between 0.0 and +1.0 degrees Celsius per century. So Light-green is a Slowdown compared to yellow or light-orange.
You now have all of the information that you need to find a Slowdown. Find a contour map with yellow or orange at the top point of the triangular contour map. Now look for any green colour on the map. If you can find any green, then you have found a Slowdown. If you need any help, most 8 year olds are very good at this.
If anybody has any questions, then I will be checking the comments below this article.