Natural Variability in the Widths of the Tropics

Guest Post by Willis Eschenbach In my previous post, “Does This Analysis Make My Tropics Look Big?“I discussed a paper called “Recent Northern Hemisphere tropical expansion primarily driven by black carbon and tropospheric ozone”, by Robert Allen et al, hereinafter A2012. They use several metrics to measure the width of the tropics—the location of the…

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Does This Analysis Make My Tropics Look Big?

Guest Post by Willis Eschenbach There is a new paper in Nature magazine that claims that the tropics are expanding. This would be worrisome because it could push the dry zones further north and south, moving the Saharan aridity into Southern Europe. The paper is called “Recent Northern Hemisphere tropical expansion primarily driven by black…

UAH Global temperature, up in April

UAH Global Temperature Update for April 2012: +0.30°C By Dr. Roy Spencer The global average lower tropospheric temperature anomaly increased again in April, 2012, to +0.30°C., with warming in both Northern and Southern Hemispheres, but slightly cool conditions persisting in the tropics (click on the image for the full-size version): The corresponding April anomaly from…

Shakun The Last, I Hope

Guest Post by Willis Eschenbach In three previous posts here, here, and here, I discussed problems with the paper by Shakun et al., “Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation” (PDF,hereinafter S2012) Commenters said, and reasonably so, that I had not fully addressed their claim that warming progressed from south…

No global climate change in the past 20,000 years?

Guest post by Dr. Don J. Easterbrook Dept. of Geology, Western Washington University, Bellingham, WA In a paper entitled “Current global warming appears anomalous in relation to the climate of the last 20 000 years,” Svante Björck claims that, over the past 20,000 years, there have been no world-wide, synchronous, climate changes until recently and…

The Durban ramp-up begins – now the Earth only warms by hemispheres, and not simultaneously – until now

From Lund University, a new way to blame modern man.  Look for more nuttiness like this as the Durban climate conference approaches. Read the conclusion of the paper below, which is a long winded treatise of speculation. New study shows no simultaneous warming of northern and southern hemispheres as a result of climate change for…