Climate Change in Prehistory: The End of the Reign of Chaos by William James Burroughs

By William James Burroughs

This ebook is thoroughly written with the entire right citations regular of an instructional textual content. i discovered the writer to be uncomplicated approximately what he is familiar with and the way he understands it. additionally, Burroughs isn't really afraid to inform you whilst he's speculating rather than interpretations in keeping with clinical evidence. in spite of everything the ebook is a brilliant learn. i like to recommend it to a person attracted to the weather that early homo sapiens developed in.

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Although this may appear to be dusty 20 T H E C L I M A T E O F T H E P A S T 1 0 0 0 0 0 Y E A R S statistical hair-splitting, it is essential in unscrambling the extraordinary range of fluctuations that have occurred during the last ice age and the subsequent warm period. At the most basic level, we are not concerned about the weather, which is what is happening to the atmosphere at any given time, but about the climate – that is, what would be expected to occur at any given time of the year based on statistics built up over many years.

This is whether the evidence from far-flung places like Antarctica, Greenland or the depths of the great oceans provides a real measure of what was happening across the plains of Eurasia, or in Africa or Australia. Clearly the major changes associated with the waxing and waning of the ice ages were global in nature. 7. Deep-ocean sediment core from the central North Atlantic showing the link between Heinrich events (labelled H1 to H6), which can be seen in the increase of ice-rafted debris (lithics) (white curve) and the surface water temperature as revealed in the incidence of cold-water foraminifera Neoglobigerina pachyderma (black curve).

The second important source of climatic information is the types of species living near the surface at any given time, and their relative abundance is a guide to surface temperatures – the presence or absence of species that only survive in warm or cold water is a direct measure of the conditions when they were alive. So by mapping the populations of different creatures at different times using cores taken from around the world, it is possible to construct a picture of how the temperature of the oceans’ surface waters varied over time.

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