Ancient Air Challenges Prominent Explanation For A Shift In Glacial Cycles

From Nature An analysis of air up to 2 million years old, trapped in Antarctic ice, shows that a major shift in the periodicity of glacial cycles was probably not caused by a long-term decline in atmospheric levels of carbon dioxide. Eric W. Wolff During the past 2.6 million years, Earth’s climate has alternated between…

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Back to the Anthropocene! Arctic Sea Ice Edition

Guest geological story-telling by David Middleton Do you ever get tired of smarmy, snot-nosed articles like this? Obituary: Remembering the Holocene Epoch BY CHRIS WILSON AUGUST 29, 2016 The Holocene Epoch, which witnessed milestones from the development of Crater Lake to the invention of the electric guitar, died prematurely Monday in Cape Town at the age of…

Switching on the Atlantic heat pump

Stockholm University 34 million years ago the warm ‘greenhouse climate’ of the dinosaur age ended and the colder ‘icehouse climate’ of today commenced. Antarctica glaciated first and geological data imply that the Atlantic meridional overturning circulation, the global ocean conveyor belt of heat and nutrients that today helps keep Europe warm, also started at this…

Listen to the Trees!

Guest post by Jim Steele What’s Natural? Published in Pacifica. Tribune August 20,2019 This summer I taught a class on the Natural History of the Sierra Nevada for San Francisco State University’s Sierra Nevada Field Campus. The first day we taught students how to identify the trees. Once students know their trees, they can easily…

In Search of the Enchanted Larch of Yamal

International team to study effect of climate change on the arctic Anthropologist Peter Ungar will study impact on the ecology of people and mammals University of Arkansas Peter Ungar, Distinguished Professor of anthropology and director of the Environmental Dynamics Program, will contribute to a two-year multidisciplinary and multi-institutional project studying the impact of climate change…