Discovery: Past Global Warming was more Extreme, Temperatures of 12–14C, today equivalent is around 1–2C

Ars Technica: New technique shows old temperatures were much hotter than thought. Results imply Earth may be more sensitive to carbon dioxide than previously known. In a paper recently published in Science, Professor Nele Meckler of the University of Bergen and colleagues argue that the climate between around 35 and 60 million years ago may have been…

The Climate State of the Holocene and Anthropocene (Rates of Change)

Supplemental of Trajectories of the Earth System in the Anthropocene Will Steffen, Johan Rockström, Katherine Richardson, Timothy M. Lenton, Carl Folke, Diana Liverman, Colin P. Summerhayes, Anthony D. Barnosky, Sarah E. Cornell, Michel Crucifix, Jonathan F. Donges, Ingo Fetzer, Steven J. Lade, Marten Scheffer, Ricarda Winkelmann, and Hans Joachim Schellnhuber PNAS August 6, 2018. 201810141;…

Jim Hansen: Hell Will Break Loose – Ice Melt, Sea Level Rise and Superstorms

The main point that I want to make concerns the threat of irreparable harm, which I feel we have not communicated well enough to people who most need to know, the public and policymakers. I’m not sure how we can do that better, but I comment on it at the end of this transcript. In…

Dan Lunt: Past climates and climate sensitivity #DeepTime #Reconstruction #3DEdition

To curiosity-driven scientist Dan Lunt, understanding the past climate of our Earth (from the scorching greenhouse of the mid-Cretaceous, to the frozen wastes of the last ice age) is of fundamental interest. Support more Climate State coverage: Paypal email: donate@ClimateState.com Patreon https://www.patreon.com/ClimateState Links for this episode: http://www.bristol.ac.uk/cabot/events/2015/past-future-fantasy.html Watch full lecture https://www.youtube.com/watch?v=SiXREvxFws0 Related The 8 Minute…

Novel climate proxy reveals CO2 content of Earth’s atmosphere, of the past 400 million years

The study New constraints on atmospheric CO2 concentration for the Phanerozoic (DOI: 10.1002/2014GL060457), by Peter J. Franks, Dana L. Royer, David J. Beerling , Peter K. Van de Water, David J. Cantrill, Margaret M. Barbour, and Joseph A. Berry, estimates CO2 in Earth history based on a new climate proxy. Estimates are in particular based…

Spot on! Michael Mann: The irreversible impacts from Climate Change

Mann’s interview starts at 15 minutes in. Mike Mann discusses his new piece in Scientific American, which outlines critical thresholds in climate warming in the not-too-far-off future, based on the sensitivity of Earth climate. Scientific American: Most scientists concur that two degrees C of warming above the temperature during preindustrial time would harm all sectors of…