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A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe / D McCarroll; N. J Loader; R Jalkanen; M. H Gagen; H Grudd; B. E Gunnarson; A. J Kirchhefer; M Friedrich; H. W Linderholm; M Lindholm; T Boettger; S. O Los; S Remmele; Y. M Kononov; Y. H Yamazaki; G. H Young; E Zorita

The Holocene, Volume: 23, Issue: 4, Pages: 471 - 484

Swansea University Author: McCarroll, Danny

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Abstract

Combining nine tree growth proxies from four sites, from the west coast of Norway to the Kola Peninsula of NW Russia, provides a well replicated (> 100 annual measurements per year) mean index of tree growth over the last 1200 years that represents the growth of much of the northern pine timberli...

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Published in: The Holocene
ISSN: 0959-6836 1477-0911
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa13894
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spelling 2017-08-03T13:48:44Z v2 13894 2013-01-15 A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe Danny McCarroll Danny McCarroll true 0000-0002-5992-5070 false 6d181d926aaac8932c2bfa8d0e7f6960 dc4c6df4903bdd8399c36aeb8e6458fe 6GfJiyPJqfJlLzFjEm3VgBXCE6Z9OGBXOD9D5JU4+T4= 2013-01-15 SGE Combining nine tree growth proxies from four sites, from the west coast of Norway to the Kola Peninsula of NW Russia, provides a well replicated (> 100 annual measurements per year) mean index of tree growth over the last 1200 years that represents the growth of much of the northern pine timberline forests of northern Fennoscandia. The simple mean of the nine series, z-scored over their common period, correlates strongly with mean June to August temperature averaged over this region (r = 0.81), allowing reconstructions of summer temperature based on regression and variance scaling. The reconstructions correlate significantly with gridded summer temperatures across the whole of Fennoscandia, extending north across Svalbard and south into Denmark. Uncertainty in the reconstructions is estimated by combining the uncertainty in mean tree growth with the uncertainty in the regression models. Over the last seven centuries the uncertainty is < 4.5% higher than in the 20th century, and reaches a maximum of 12% above recent levels during the 10th century. The results suggest that the 20th century was the warmest of the last 1200 years, but that it was not significantly different from the 11th century. The coldest century was the 17th. The impact of volcanic eruptions is clear, and a delayed recovery from pairs or multiple eruptions suggests the presence of some positive feedback mechanism. There is no clear and consistent link between northern Fennoscandian summer temperatures and solar forcing. Journal article The Holocene 23 4 471 484 0959-6836 1477-0911 0 0 2013 2013-01-01 10.1177/0959683612467483 College of Science Geography CSCI SGE Environmental Dynamics None 2017-08-03T13:48:44Z 2013-01-15T15:44:10Z College of Science Geography D McCarroll 1 N. J Loader 2 R Jalkanen 3 M. H Gagen 4 H Grudd 5 B. E Gunnarson 6 A. J Kirchhefer 7 M Friedrich 8 H. W Linderholm 9 M Lindholm 10 T Boettger 11 S. O Los 12 S Remmele 13 Y. M Kononov 14 Y. H Yamazaki 15 G. H Young 16 E Zorita 17
title A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
spellingShingle A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
McCarroll, Danny
title_short A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
title_full A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
title_fullStr A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
title_full_unstemmed A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
title_sort A 1200-year multiproxy record of tree growth and summer temperature at the northern pine forest limit of Europe
author_id_str_mv 6d181d926aaac8932c2bfa8d0e7f6960
author_id_fullname_str_mv 6d181d926aaac8932c2bfa8d0e7f6960_***_McCarroll, Danny
author McCarroll, Danny
author2 D McCarroll
N. J Loader
R Jalkanen
M. H Gagen
H Grudd
B. E Gunnarson
A. J Kirchhefer
M Friedrich
H. W Linderholm
M Lindholm
T Boettger
S. O Los
S Remmele
Y. M Kononov
Y. H Yamazaki
G. H Young
E Zorita
format Journal article
container_title The Holocene
container_volume 23
container_issue 4
container_start_page 471
publishDate 2013
institution Swansea University
issn 0959-6836
1477-0911
doi_str_mv 10.1177/0959683612467483
college_str College of Science
hierarchytype
hierarchy_top_id collegeofscience
hierarchy_top_title College of Science
hierarchy_parent_id collegeofscience
hierarchy_parent_title College of Science
department_str Geography{{{_:::_}}}College of Science{{{_:::_}}}Geography
document_store_str 0
active_str 1
researchgroup_str Environmental Dynamics
description Combining nine tree growth proxies from four sites, from the west coast of Norway to the Kola Peninsula of NW Russia, provides a well replicated (> 100 annual measurements per year) mean index of tree growth over the last 1200 years that represents the growth of much of the northern pine timberline forests of northern Fennoscandia. The simple mean of the nine series, z-scored over their common period, correlates strongly with mean June to August temperature averaged over this region (r = 0.81), allowing reconstructions of summer temperature based on regression and variance scaling. The reconstructions correlate significantly with gridded summer temperatures across the whole of Fennoscandia, extending north across Svalbard and south into Denmark. Uncertainty in the reconstructions is estimated by combining the uncertainty in mean tree growth with the uncertainty in the regression models. Over the last seven centuries the uncertainty is < 4.5% higher than in the 20th century, and reaches a maximum of 12% above recent levels during the 10th century. The results suggest that the 20th century was the warmest of the last 1200 years, but that it was not significantly different from the 11th century. The coldest century was the 17th. The impact of volcanic eruptions is clear, and a delayed recovery from pairs or multiple eruptions suggests the presence of some positive feedback mechanism. There is no clear and consistent link between northern Fennoscandian summer temperatures and solar forcing.
published_date 2013-01-01T18:59:30Z
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