A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings
To assess past climate variability in west-central Scandinavia, a new 972-year-long temperature reconstruction, based on adjusted delta blue intensity (ΔBIadj), was created. Presently, it is the longest blue intensity chronology in Fennoscandia and the third longest in the northern hemisphere. Measu...
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Language: | English |
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Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK)
2018
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148929 https://doi.org/10.1177/0959683617721322 |
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ftstockholmuniv:oai:DiVA.org:su-148929 2023-05-15T16:12:10+02:00 A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings Fuentes, Mauricio Salo, Riikka Björklund, Jesper Seftigen, Kristina Zhang, Peng Gunnarson, Björn E. Aravena, Juan-Carlos Linderholm, Hans W. 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148929 https://doi.org/10.1177/0959683617721322 eng eng Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK) The Holocene, 0959-6836, 2018, 28:2, s. 254-266 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148929 doi:10.1177/0959683617721322 ISI:000424957000007 info:eu-repo/semantics/openAccess 1000 years blue intensity MXD Pinus sylvestris L Scandinavia temperature reconstruction tree rings Climate Research Klimatforskning Article in journal info:eu-repo/semantics/article text 2018 ftstockholmuniv https://doi.org/10.1177/0959683617721322 2023-02-23T21:43:27Z To assess past climate variability in west-central Scandinavia, a new 972-year-long temperature reconstruction, based on adjusted delta blue intensity (ΔBIadj), was created. Presently, it is the longest blue intensity chronology in Fennoscandia and the third longest in the northern hemisphere. Measurements were obtained from 119 tree line Scots pine (Pinus sylvestris L.) samples from Rogen, in the central Scandinavian Mountains, Sweden. Early and latewood blue intensity absorption data were used to create ΔBIadj. The data were detrended using a signal-free regional curve standardization method (RSFi) to minimize biological noise and maximize low-frequency climate information. The Rogen ΔBIadj chronology has a substantially stronger temperature signal at inter-annual timescales than the corresponding tree-ring width (RW) chronology, and it displays good spatial representation for the south-central parts of Scandinavia. The ΔBIadj summer (June through August) temperature reconstruction, extending back to 1038 CE, exhibits three warm periods in 1040–1190 CE, 1370–1570 CE and the 20th century and one extended cold period between 1570 and 1920 CE. Regional summer temperature anomalies are associated with a Scandinavian–Greenland dipole sea-level pressure pattern, which has been stable for the past several centuries. Major volcanic eruptions produce distinct anomalies of ΔBIadj indices indicating cooling of summer temperatures in the subsequent years. Our results show that ΔBIadj from Pinus sylvestris in Scandinavia is a suitable proxy providing opportunities to explore past temperature variability at various frequencies, atmospheric dynamics and variability in external forcing. Nevertheless, long-term trend differences with RW imply that further research is needed to fully understand the application of this technique in dendroclimatology. Article in Journal/Newspaper Fennoscandia Greenland Stockholm University: Publications (DiVA) Greenland Rogen ENVELOPE(7.502,7.502,63.052,63.052) The Holocene 28 2 254 266 |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
1000 years blue intensity MXD Pinus sylvestris L Scandinavia temperature reconstruction tree rings Climate Research Klimatforskning |
spellingShingle |
1000 years blue intensity MXD Pinus sylvestris L Scandinavia temperature reconstruction tree rings Climate Research Klimatforskning Fuentes, Mauricio Salo, Riikka Björklund, Jesper Seftigen, Kristina Zhang, Peng Gunnarson, Björn E. Aravena, Juan-Carlos Linderholm, Hans W. A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
topic_facet |
1000 years blue intensity MXD Pinus sylvestris L Scandinavia temperature reconstruction tree rings Climate Research Klimatforskning |
description |
To assess past climate variability in west-central Scandinavia, a new 972-year-long temperature reconstruction, based on adjusted delta blue intensity (ΔBIadj), was created. Presently, it is the longest blue intensity chronology in Fennoscandia and the third longest in the northern hemisphere. Measurements were obtained from 119 tree line Scots pine (Pinus sylvestris L.) samples from Rogen, in the central Scandinavian Mountains, Sweden. Early and latewood blue intensity absorption data were used to create ΔBIadj. The data were detrended using a signal-free regional curve standardization method (RSFi) to minimize biological noise and maximize low-frequency climate information. The Rogen ΔBIadj chronology has a substantially stronger temperature signal at inter-annual timescales than the corresponding tree-ring width (RW) chronology, and it displays good spatial representation for the south-central parts of Scandinavia. The ΔBIadj summer (June through August) temperature reconstruction, extending back to 1038 CE, exhibits three warm periods in 1040–1190 CE, 1370–1570 CE and the 20th century and one extended cold period between 1570 and 1920 CE. Regional summer temperature anomalies are associated with a Scandinavian–Greenland dipole sea-level pressure pattern, which has been stable for the past several centuries. Major volcanic eruptions produce distinct anomalies of ΔBIadj indices indicating cooling of summer temperatures in the subsequent years. Our results show that ΔBIadj from Pinus sylvestris in Scandinavia is a suitable proxy providing opportunities to explore past temperature variability at various frequencies, atmospheric dynamics and variability in external forcing. Nevertheless, long-term trend differences with RW imply that further research is needed to fully understand the application of this technique in dendroclimatology. |
format |
Article in Journal/Newspaper |
author |
Fuentes, Mauricio Salo, Riikka Björklund, Jesper Seftigen, Kristina Zhang, Peng Gunnarson, Björn E. Aravena, Juan-Carlos Linderholm, Hans W. |
author_facet |
Fuentes, Mauricio Salo, Riikka Björklund, Jesper Seftigen, Kristina Zhang, Peng Gunnarson, Björn E. Aravena, Juan-Carlos Linderholm, Hans W. |
author_sort |
Fuentes, Mauricio |
title |
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
title_short |
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
title_full |
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
title_fullStr |
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
title_full_unstemmed |
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree rings |
title_sort |
970-year-long summer temperature reconstruction from rogen, west-central sweden, based on blue intensity from tree rings |
publisher |
Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK) |
publishDate |
2018 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148929 https://doi.org/10.1177/0959683617721322 |
long_lat |
ENVELOPE(7.502,7.502,63.052,63.052) |
geographic |
Greenland Rogen |
geographic_facet |
Greenland Rogen |
genre |
Fennoscandia Greenland |
genre_facet |
Fennoscandia Greenland |
op_relation |
The Holocene, 0959-6836, 2018, 28:2, s. 254-266 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148929 doi:10.1177/0959683617721322 ISI:000424957000007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1177/0959683617721322 |
container_title |
The Holocene |
container_volume |
28 |
container_issue |
2 |
container_start_page |
254 |
op_container_end_page |
266 |
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1765997411727048704 |