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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Sci+Rep 2015 ; 5 (ä): ä Nephropedia Template TP
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A composite annual-resolution stalagmite record of North Atlantic climate over the last three millennia #MMPMID26068805
Baker A; C. Hellstrom J; Kelly BFJ; Mariethoz G; Trouet V
Sci Rep 2015[]; 5 (ä): ä PMID26068805show ga
Annually laminated stalagmites can be used to construct a precise chronology, and variations in laminae thickness provide an annual growth-rate record that can be used as a proxy for past climate and environmental change. Here, we present and analyse the first composite speleothem annual growth-rate record based on five stalagmites from the same cave system in northwest Scotland, where precipitation is sensitive to North Atlantic climate variability and the winter North Atlantic Oscillation (NAO). Our 3000-year record confirms persistently low growth-rates, reflective of positive NAO states, during the Medieval Climate Anomaly (MCA). Another persistently low growth period occurring at 290-550?CE coincides with the European Migration Period, and a subsequent period of sustained fast growth-rate (negative NAO) from 600-900?AD provides the climate context for the Viking Age in northern and western Europe.