Low-frequency summer temperature variation in central Sweden since the tenth century inferred from tree rings
Living and subfossil Scots pine ( Pinus sylvestris L.) sampled close to the present tree-line in the central Scandinavian Mountains were used to build a continuous 1091-year long tree-ring-width chronology, spanning from ad 909 to 1998. Summer temperatures of the growth year had the highest influenc...
| Published in: | The Holocene |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
SAGE Publications
2002
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1191/0959683602hl579rp https://journals.sagepub.com/doi/pdf/10.1191/0959683602hl579rp |
| Summary: | Living and subfossil Scots pine ( Pinus sylvestris L.) sampled close to the present tree-line in the central Scandinavian Mountains were used to build a continuous 1091-year long tree-ring-width chronology, spanning from ad 909 to 1998. Summer temperatures of the growth year had the highest influence on annual growth. The Håckren chronology represent a record of summer temperatures, where periods of low growth and poor regeneration of pine represent unfavourable climate conditions. Low growth was encountered in the mid-twelfth, thirteenth, late sixteenth, early seventeenth and late eighteenth centuries. Periods of high growth (high regeneration rate and above-average growth), indicating high summer temperatures, were recognized in the mid-tenth to late eleventh, mid-fourteenth, mid-seventeenth and twentieth centuries. As the chronology is well correlated with other high-latitude proxy data from Fennoscandia, as well as the Northern Hemisphere, we argue that the Håckren chronology is a valid proxy-data record of regional summer temperatures. |
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