A chronology of climatic downturns through the mid- and late-Holocene: tracing the distant effects of explosive eruptions from palaeoclimatic and historical evidence in northern Europe

Polar research

Jari Holopainen¹  Kari Mielikäinen²  Mauri Timonen³  Samuli Helama⁴  Marc Macias-Fauria⁵ 

[1] Department of Geosciences and Geography University of Helsinki PO Box 64, FI-00014 HelsinkiFinland;Finnish Forest Research Institute Southern Unit PO Box 18, FI-01301 VantaaFinland;Finnish Forest Research Institute, Northern Unit PO Box 16, FI-96301 RovaniemiFinland;Finnish Forest Research Institute, Northern Unit PO Box 16, FI-96301 RovaniemiFinland Correspondence;Oxford Long-term Ecology Laboratory, Biodiversity Institute, Department of Zoology University of Oxford, Tinbergen Building South Parks RoadOxford OX1 3PS UK

关键词: Geochronology;    dendroclimatology;    historical agriculture;    palaeoclimate;    volcanism;   

DOI  :  10.3402/polar.v32i0.15866

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Geochronological data of the conifer tree rings in a region sensitive to climatic effects of explosive eruptions were analysed for sudden growth reductions in association with extraordinarily cool reconstructed summer temperatures since 5500 B.C. Tree-ring data came from the stems of living trees and subfossil tree remains collected as increment cores and discs, respectively, from an area of northernmost Finnish Lapland (70–68°N to 30–20°E). Calendar year dates when the tree-ring signatures (i.e., growth reductions and reconstructed temperatures) were concurrent were compared with sulphate data from Greenland ice cores. Previous and new evidence are in agreement in demonstrating volcanism behind late-Holocene events in 1601 A.D. and 536 A.D., suggesting that the same causal relationship can be implied further back in time. Our data show that earlier events were found to have occurred in the years 330 B.C., 874 B.C., 1464 B.C., 1584 B.C., 2564 B.C. and 2850 B.C. Interestingly, events of lesser magnitude fo...

【 授权许可】

CC BY-NC