Category Archives: Ice Ages

5 Million years of cooling

Posted on June 4, 2019 by Clive Best

Why did the earth cool ~6C during the Pleistocene resulting in the current deep ~100 Ky glacial cycles? The most probable cause  is plate tectonics – the opening of the Atlantic and continuing rise of the Himalayas after India collided … Continue reading →

Posted in Ice Ages, Paleoclimatology | Tagged | 4 Comments

Towards an understanding of Ice Ages

Posted on October 31, 2018 by Clive Best

An Ice model driven by NH insolation but adjusted for dust albedo does a pretty good job at reproducing the last 8 glacial cycles. Details are described below. Prior to the Mid Pleistocene Transition (MPT) roughly one million years ago,  … Continue reading →

Posted in Climate Change, Ice Ages | Tagged | 31 Comments

The Milankovitch Puzzle

Posted on October 10, 2018 by Clive Best

The main focus in understanding Glacial cycles has been on the maximum summer insolation at 65N, yet prior to MPT (Mid Pleistocene Transition) all glaciations simply followed the obliquity cycle. To understand why obliquity is the underlying metronome, we need … Continue reading →

Posted in Climate Change, Ice Ages | Tagged | 11 Comments