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

By William James Burroughs

This publication is punctiliously written with all the right citations commonplace of an instructional textual content. i discovered the writer to be simple approximately what he understands and the way he understands it. additionally, Burroughs isn't afraid to inform you whilst he's speculating in place of interpretations in response to clinical evidence. after all the booklet is a smart learn. i like to recommend it to a person drawn to the weather that early homo sapiens developed in.

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Climate Change in Prehistory: The End of the Reign of Chaos

This booklet is thoroughly written with all the right citations commonplace of a tutorial textual content. i discovered the writer to be ordinary approximately what he understands and the way he understands it. additionally, Burroughs isn't afraid to inform you whilst he's speculating instead of interpretations in response to medical evidence. after all the e-book is a smart learn.

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Turning to land-based measurements, there is a huge range of independent observations that can be used to draw parallels with icecore and ocean-sediment data. One of the most relevant sources of detailed climatic analysis has been obtained from lakes where layers of silt have been deposited for over 100 kyr. In these instances, and in many other cases of measurements on land, some of the most important indicators of changing environmental conditions are the amount and types of pollen found in sediments.

3 PROXY DATA Our view of climate history started to change radically in the 1950s. This was built on a variety of sources, such as tree rings, pollen records, ocean sediments and ice cores. Known as proxy data, measurements of the properties of these sources provided new insights into climate change. Although tree rings and pollen records had already provided insights into past climate change, it was the advent of new technologies, such as the ability to drill cores from the sediments at the bottom of the deepest ocean basins, that transformed our knowledge of the world around us.

In the same way as northern North America and Siberia supported extensive megafauna throughout the Holocene, and Africa does now, during much of the last ice age vast areas of mid-latitude Eurasia sustained abundant wildlife. This stereotypical and blinkered view of the past reflected the limitations of the data. On land, many features of the past are swept away by subsequent events. This is especially true of anything to do with ice sheets. As they waxed and waned they scoured the landscape clean of soil and the attendant vegetation.

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