Rising CO2 levels are not causing an increase in extreme hot weather temperatures in South America - another of those irrefutable "global warming" science facts
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Read here. The AGW hypothesis speculates that rising levels of atmospheric CO2 will cause extremes in hot weather temperatures, across the world. Further speculation claims that extreme hot temperatures will result in catastrophic anthropogenic global warming (CAGW).
A new peer reviewed study investigated whether South America has experienced new extremes (both extreme hot and extreme cold) in temperatures. It was determined that there has been a decline in both record-setting maximum and minimum temperatures. Essentially, growing CO2 levels are not causing more maximum record temperatures, nor more minimum record temperatures.
"Climate alarmists typically claim that one of the negative consequences of global warming is a concomitant increase in climatic variability, including more extreme values of meteorological variables, such as air temperature... in general, over most of South America there has been a decrease in the extremeness of both daily maximum and minimum air temperatures, with the maximums declining and the minimums rising...cold waves and frost days have been on the decline nearly everywhere throughout the continent during the period of 20th-century global warming." [Matilde Rusticucci 2012: Atmospheric Research]
Conclusions: Despite rising global CO2 levels, South America has not experienced the predicted more frequent extreme hot and extreme cold temperatures over the 20th century. Those are the inconvenient global warming science facts that undercut the CAGW hypothesis.
Previous failed-prediction and peer-reviewed postings.
