By Philip Douglas Jones, Raymond Stephen Bradley, Jean Jouzel
A profound wisdom of the previous weather is essential for our knowing of worldwide warming. The previous 2000 years are either the interval that's of such a lot relevance to the following century and that for which there's the main proof. High-resolution proxy files for this era can be found from numerous assets. 5 sections examine dendroclimatology, ice cores, corals, old documents, lake varves, and different symptoms. the ultimate sections hide the histories of assorted forcing components and try and collect files from quite a few assets and supply explanations.
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Extra resources for Climatic Variations and Forcing Mechanisms of the Last 2000 Years
Even when the limitations of specific dendroclimatic reconstructions are explicitly stated or clearly implicit in the description of the work, they can be overlooked in subsequent use or interpretation of the data by others. We have focused on specific examples, drawn from our own work, to illustrate the uncertainty that accompanies attempts to reconstruct progressively longer timescales of climate variation. While these problems are real, their specific nature should not be generalized to all dendroclimatic situations.
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Our observations on the need to demonstrate the replication of long-timescale variability in proxy data and the problems of formal climate calibration (and verification) of this variability are as relevant to these other palaeoclimate sources as they are to tree-ring data. Despite the problems, working towards the successful exploitation of long-timescale climate information in all of these records is clearly worthwhile. A knowledge of climate change on timescales from one to several hundred years, especially during the recent millennia is of crucial importance for providing a context within which to analyse the climate variability that has been observed during the last century.