Climate change alarministas claim that modern human CO2 emissions are causing hotter temperatures around the world and the U.S...extreme global warming with blistering temperatures is their rallying cry but is it true?...Nope...it's another case of 'those stubborn facts'.....
Of course, the CAGW argument has been (and continues to be) that huge CO2 emissions have produced extremely hot weather records during the 1980's, 90's and the 21st century, so far. But is it true?
Well, as pointed out earlier this year, the feared global warming is not producing the proclaimed hotter temperature records across the world.
And for the U.S.? NOAA confirms the same through June 2014. It is empirically true that the climate alarministas fear-mongering about record-setting extremes are without merit.
Case in point. This collection of charts depict NOAA's climate record frequency for maximum monthly temperatures across the contiguous U.S.
Figure #1 is the record of the 5% hottest months since 1980 in the U.S. Out of 409 months (34+ years), these 20 months represent the extreme. (The light blue data-points are the climate records since 1980 for all charts.)
Figure #2 is the 409-month record starting in 1920. These are the extreme 5% hottest months in the U.S. prior to the 1960s. (The dull red data-points are the climate records since 1920 for all charts.)
Figure #3 reveals that there have been zero months in the U.S. since 1980 that have had over 90 degree monthly averages. In contrast, the 1930's had two. In addition, for the period prior to 1980, there have been 57 months that averaged over 85 degrees while the period since 1980 there have been only 54.
Figure #4 plots the 60 hottest months for the two periods. Clearly, the pre-modern era produced hotter monthly records. These top 60 month plots represent the extreme 14.3% of each respective period.
For CO2 context, total global CO2 emissions are listed for each period (past and modern) on figures #1 and #2. The modern era emission tonnes are higher by a factor of 5+.
The evidence could not be clearer. Huge CO2 emissions, and higher atmospheric CO2 levels, do not correlate with a greater frequency of higher monthly maximum temperature records. This is indisputable.
Does this mean there won't be new record maximum temperatures set in the future? No, it does not. But, with that said, it is highly probable that future maximum records and their frequency have absolutely zero to do with greater CO2 emissions.
Ɗaɱn those stubborn facts!
Note: Source of U.S. maximum monthly temperatures since 1895 (choose Maximum temperature; choose 1895 and 2014; choose Previous 12-months; choose June; click plot button; scroll down and click Excel icon to download data; in Excel, select period june 1920 thru june 1964 and period june 1980 thru june 2014 (these are the two 409-month periods used in charts);and then sort each period by largest to smallest monthly temperatures. Modern CO2 emission tonnes and past emission tonnes.