Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland
Stable carbon isotope ratios from the latewood cellulose of 12 trees from two sites in northern Finland are used to construct an isotope chronology covering AD 1640 to 2002. By measuring isotopic ratios of every sample independently it is possible to identify and remove the juvenile portion of each...
Published in: | The Holocene |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1177/0959683607077012 https://journals.sagepub.com/doi/pdf/10.1177/0959683607077012 |
id |
crsagepubl:10.1177/0959683607077012 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1177/0959683607077012 2024-10-13T14:07:09+00:00 Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland Gagen, Mary McCarroll, Danny Loader, Neil J. Robertson, Iain Jalkanen, Risto Anchukaitis, Kevin J. 2007 http://dx.doi.org/10.1177/0959683607077012 https://journals.sagepub.com/doi/pdf/10.1177/0959683607077012 en eng SAGE Publications https://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 17, issue 4, page 435-446 ISSN 0959-6836 1477-0911 journal-article 2007 crsagepubl https://doi.org/10.1177/0959683607077012 2024-09-24T04:14:50Z Stable carbon isotope ratios from the latewood cellulose of 12 trees from two sites in northern Finland are used to construct an isotope chronology covering AD 1640 to 2002. By measuring isotopic ratios of every sample independently it is possible to identify and remove the juvenile portion of each δ 13 C series, correct the individual series for anthropogenic changes in atmospheric carbon dioxide isotopic ratios and concentrations, and to quantify changes in signal strength through time. Most importantly, it is possible to demonstrate that there are no long-term trends in the carbon isotope series that are related to tree age. This means that it is not necessary to detrend the series and so they have the potential to retain climate information at all temporal frequencies. The correlation between the non-detrended carbon isotope series and July/August mean temperature is high ( r=0.72) and comparison with meteorological records suggests that the dominant control over tree ring δ 13 C at these high latitude, moist sites is photosynthetic rate rather than stomatal conductance. Summer temperature reconstructions based on three different calibrations are presented, with verification based on a mixture of jacknife and split period designs, providing robust and near identical results. Reconstructed late summer temperatures in the early 1900s are very low but the years centred around AD 1660 and 1760 appear to have experienced warmer summers than the late twentieth century, thus our late summer reconstruction does not show a recent warming trend. Our results are in agreement with other palaeoclimate reconstructions for northern Fennoscandia, which show late twentieth-century warming occurring predominantly in the winter. Our results suggest that, where replication and common signal strength are sufficiently high, stable carbon isotope dendroclimatology may provide high resolution proxy time series that also record climate information at lower temporal frequencies, thus avoiding the `segment length curse' that can apply ... Article in Journal/Newspaper Fennoscandia Northern Finland SAGE Publications The Holocene 17 4 435 446 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
Stable carbon isotope ratios from the latewood cellulose of 12 trees from two sites in northern Finland are used to construct an isotope chronology covering AD 1640 to 2002. By measuring isotopic ratios of every sample independently it is possible to identify and remove the juvenile portion of each δ 13 C series, correct the individual series for anthropogenic changes in atmospheric carbon dioxide isotopic ratios and concentrations, and to quantify changes in signal strength through time. Most importantly, it is possible to demonstrate that there are no long-term trends in the carbon isotope series that are related to tree age. This means that it is not necessary to detrend the series and so they have the potential to retain climate information at all temporal frequencies. The correlation between the non-detrended carbon isotope series and July/August mean temperature is high ( r=0.72) and comparison with meteorological records suggests that the dominant control over tree ring δ 13 C at these high latitude, moist sites is photosynthetic rate rather than stomatal conductance. Summer temperature reconstructions based on three different calibrations are presented, with verification based on a mixture of jacknife and split period designs, providing robust and near identical results. Reconstructed late summer temperatures in the early 1900s are very low but the years centred around AD 1660 and 1760 appear to have experienced warmer summers than the late twentieth century, thus our late summer reconstruction does not show a recent warming trend. Our results are in agreement with other palaeoclimate reconstructions for northern Fennoscandia, which show late twentieth-century warming occurring predominantly in the winter. Our results suggest that, where replication and common signal strength are sufficiently high, stable carbon isotope dendroclimatology may provide high resolution proxy time series that also record climate information at lower temporal frequencies, thus avoiding the `segment length curse' that can apply ... |
format |
Article in Journal/Newspaper |
author |
Gagen, Mary McCarroll, Danny Loader, Neil J. Robertson, Iain Jalkanen, Risto Anchukaitis, Kevin J. |
spellingShingle |
Gagen, Mary McCarroll, Danny Loader, Neil J. Robertson, Iain Jalkanen, Risto Anchukaitis, Kevin J. Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
author_facet |
Gagen, Mary McCarroll, Danny Loader, Neil J. Robertson, Iain Jalkanen, Risto Anchukaitis, Kevin J. |
author_sort |
Gagen, Mary |
title |
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
title_short |
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
title_full |
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
title_fullStr |
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
title_full_unstemmed |
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland |
title_sort |
exorcising the `segment length curse': summer temperature reconstruction since ad 1640 using non-detrended stable carbon isotope ratios from pine trees in northern finland |
publisher |
SAGE Publications |
publishDate |
2007 |
url |
http://dx.doi.org/10.1177/0959683607077012 https://journals.sagepub.com/doi/pdf/10.1177/0959683607077012 |
genre |
Fennoscandia Northern Finland |
genre_facet |
Fennoscandia Northern Finland |
op_source |
The Holocene volume 17, issue 4, page 435-446 ISSN 0959-6836 1477-0911 |
op_rights |
https://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683607077012 |
container_title |
The Holocene |
container_volume |
17 |
container_issue |
4 |
container_start_page |
435 |
op_container_end_page |
446 |
_version_ |
1812813431245373440 |