Global cooling since 1990?by Jonathan DuHamel on Aug. 17, 2012, under Climate change
If climate scientists can be believed (an to some that is a big if) the global mean temperature has dropped 1°C since 1990. That occurred even with ever increasing carbon dioxide emissions which climate alarmists claim is the major cause of recent global warming (in spite of the lack of supporting physical evidence).
Pierre Gosselin, a graduate of the University of Arizona, resident of Germany, and proprietor of the blog NoTricksZone, translates German scientific papers into English and offers comments.
Gosselin documents scientific literature from ca. 1990 which claims that the global mean temperature then was 15.5°C.
Gosselin also points out that German scientific literature of 2012 claims the global mean temperature is now 14.5°C. Even the IPCC’s 4th assessment report uses the 14.5°C figure while at the same time claiming the global temperature has risen by half a degree.
So, does anybody really know what the mean global temperature actually is?
Read Gosselin’s full article here.
I should point out that satellite measurements of global temperature show no net warming since 1998 (see here).
Whether it’s 14.5°C or 15.5°C, that’s still much cooler than the “normal” of around 22°C of the last 250 million years (see here).