by Bjorn Lomborg, December 6, 2018 in CAPX
The climate summit in Poland has been given a boost in recent weeks by well-timed climate change reports shaping the news agenda. But if we dig deeper than most of the media did, these reports demonstrate what is wrong with global warming policy discussion.
by Bob Tisdale, December 24, 2018 in WUWT
In this post, we’re going to present monthly mean TMIN and TMAX Near-Land Surface Air Temperatures (not in anomaly form) for a group of ten (10) Countries in an effort to add a little perspective to global warming. The list of countries, which follows, will, hopefully, reflect the home countries of recent visitors to WattsUpWithThat. The list is based on the number of visitors per country to my blog ClimateObservations during my peak year of 2014.
And, as always with my posts, as part of the text, there are hyperlinks to the data that were used to prepare the graphs. Just click on the links if you’re looking for the data.
This series of posts are logged under the Category of “Global Warming in Perspective” at WattsUpWithThat, with the link to that category here. The category link at my blog ClimateObservations is here.
by K. Richard, December 24, 2018 in NoTricksZone
Between 60 and 40 thousand years ago, during the middle of the last glacial, atmospheric CO2 levels hovered around 200 ppm – half of today’s concentration.
Tree remains dated to this period have been discovered 600-700 meters atop the modern treeline in the Russian Altai mountains. This suggests surface air temperatures were between 2°C and 3°C warmer than today during this glacial period.
Tree trunks dating to the Early Holocene (between 10.6 and 6.2 thousand years ago) have been found about 350 meters higher than the modern treeline edge. This suggests summer temperatures were between 2°C and 2.5°C warmer than today during the Early Holocene, when CO2 concentrations ranged between about 250 and 270 ppm.
None of this paleoclimate treeline or temperature evidence correlates with a CO2-driven climate.
La géologie, une science plus que passionnante … et diverse