Comments by "" (@rvdb8876) on "DW News" channel.

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  8.  @laMoria  A piece of science out: LITTLE ICE AGES Second edition By: Jean M. Grove: Historical evidence of Little Ice Age events is much more plentiful in Europe than elsewhere but the documentation from other continents, though scantier, is supported by a great volume of field evidence (e.g. Hope et al. 1976, Hastenrath 1984) It emerges that the Little Ice Age was a global phenomenon that began in or around the fourteenth century (Grove 2001a, b, Broecker 2001) and it is shown in Chapter 15 that it was not unique in the Holocene. Involving fluctuations in temperature of 2 °C or less, it was none the less sufficient to cause advance of the Greenland ice edge (Weidick 1968) and to be associated with measurable meteorological, geomorphological and vegetational changes. It is certainly true that lower temperatures were not sustained throughout the period. The Little Ice Age itself consisted of a series of frequent fluctuations, such as those exhibited in Manley's temperature curves for central England and worked out in great detail for Switzerland by Pfister. Such fluctuations consist of individual years and clusters of years in which weather conditions depart strongly from longer term means. Average conditions throughout the Little Ice Age were, none the less, such that mountain glaciers advanced to more forward positions than those they had occupied for several centuries, or in some areas even millennia, and fluctuated about those positions until the warming phase in the decades around 1900 brought them back to where they had been in earlier Holocene warm periods. It has been nicely demonstrated that certain Swiss glaciers such as the Ferpècle were of comparable extent in the 1980s and before about 3500 years BP (Röthlisberger et al. 1980 ). This finding provides excellent confirmation of Matthes's hunch that the recent recession represents merely 'one of the mild fluctuations that has occurred repeatedly in the last 4000 years'.
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