092716_1411_solarvariab31

Solar variability and the Earth’s climate

Guest essay by Andy May According to Javier and the IPCC, total solar radiation output varies little, less than 0.1%. This is only 0.7 to 1.4 Watts/m2 compared to an IPCC anthropogenic effect estimate of 2.3 Watts/m2. They believe it has a small effect on the Earth’s climate. Others, like Abdussamatov, think solar output is…

xkcd-climate-timeline

Josh takes on XKCD’s ‘climate timeline’

At WUWT, we’ve gotten several tips about the XKCD cartoon that makes yet another “hockey stick” out of climate over recorded history. Nylo comments on WUWT Tips and Notes: Marcott 2013 is still alive! Last to resurrect it is XKCD Note the references vertically written on the right: You can view it here: http://xkcd.com/1732/ Two things…

a-Reconstruction

A review of temperature reconstructions

Guest essay by Andy May In previous posts (here and here), I’ve compared historical events to the Alley and Kobashi GISP2 Central Greenland Temperature reconstructions for the past 4,000 years. Unfortunately, these two reconstructions are very different. Recently Steve McIntyre has suggested a third reconstruction by Bo Vinther. Vinther’s data can be found here. Unfortunately,…

A macro shot of salt crystals taken in the Natural History Museum of Vienna. Image: Wikimedia

New atmospheric paleoclimate tool: Rock Salt

Rock salt holds the key to a paradigm shift Boulder, Colo., USA – A team of international scientists from China, France, Scotland, United States and led by Canadian Professors Nigel Blamey and Uwe Brand of Brock University in southern Ontario made a scientific breakthrough by measuring the oxygen content of Earth’s ancient atmosphere. They discovered…

Approximately 500,000 years after the major natural disaster at the boundary between the Permian and the Triassic another event altered the vegetation fundamentally and for longer. CREDIT UZH

Previously unknown global ecological disaster discovered

From the UNIVERSITY OF ZURICH There have been several mass extinctions in the history of the earth. One of the largest known disasters occurred around 252 million years ago at the boundary between the Permian and the Triassic. Almost all sea-dwelling species and two thirds of all reptiles and amphibians died out. Although there were…