By William James Burroughs
This e-book is punctiliously written with all the right citations usual of a tutorial textual content. i discovered the writer to be hassle-free approximately what he understands and the way he understands it. additionally, Burroughs isn't really afraid to tell you while he's speculating instead of interpretations in response to medical proof. after all the publication is a smart learn. i like to recommend it to someone drawn to the weather that early homo sapiens advanced in.
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Additional info for Climate Change in Prehistory: The End of the Reign of Chaos
Clearly these deposits were the product of major climatic changes in the past. During the early part of the twentieth century, botanists in northern Europe and North America built up an extensive array of information from the vegetation, insects and pollen records from both peat beds and the sediments of lakebeds. This monumental effort produced detailed but somewhat separate chronologies for events. Here we will concentrate on the Greenland ice-core data to discuss the basic features of the transition between the LGM and the Holocene.
There are two principal reasons for its being hard to reach firm conclusions about the nature and timing of the changes during the LGM. First, there is a basic measurement challenge of reconciling the results of different measurement techniques applied to a wide variety of proxy records. Second, there is no doubt that the lowest temperatures occurred at different times around the northern hemisphere. The rapid advance in the development of computer models of the climate has, however, made it much easier to explore the nature of the climatic conditions at time.
In Fig. 1(b), (c) and (d) the same example of climatic variability is combined with examples of climate change. 1(b), while in curve (c) the variability is combined with a sudden drop in temperature, which represents, during the period of observation, a once and for all change in the climate, and in curve (d) the variability is combined with a periodic change in the underlying climate. The implication of the forms of change shown in Fig. 1 is that the level of variability remains constant while the climate changes.