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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 BF
; Mariethoz G
; Trouet V
Sci Rep
2015[Jun]; 5
(?): 10307
PMID26068805
show 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.