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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A Geological Perspective of the Greenland Ice Sheet

Guest Geological Perspective by David Middleton Before we get to my geological perspective of the Greenland Ice Sheet (GrIS), let’s first have a look at the NASA perspective: Greenland Ice Loss 2002-2016 The mass of the Greenland ice sheet has rapidly declined in the last several years due to surface melting and iceberg calving. Research…