Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data
We describe the analysis of existing and new maximum-latewood-density (MXD) and tree-ring width (TRW) data from the Torneträsk region of northern Sweden and the construction of 1500 year chronologies. Some previous work found that MXD and TRW chronologies from Torneträsk were inconsistent over the m...
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/40150/ https://doi.org/10.1177/0959683612460791 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:40150 2023-05-15T17:44:48+02:00 Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data Melvin, Thomas M. Grudd, Håkan Briffa, Keith R. 2013-03 https://ueaeprints.uea.ac.uk/id/eprint/40150/ https://doi.org/10.1177/0959683612460791 unknown Melvin, Thomas M., Grudd, Håkan and Briffa, Keith R. (2013) Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data. The Holocene, 23 (3). pp. 364-373. ISSN 0959-6836 doi:10.1177/0959683612460791 Article PeerReviewed 2013 ftuniveastangl https://doi.org/10.1177/0959683612460791 2023-01-30T21:34:17Z We describe the analysis of existing and new maximum-latewood-density (MXD) and tree-ring width (TRW) data from the Torneträsk region of northern Sweden and the construction of 1500 year chronologies. Some previous work found that MXD and TRW chronologies from Torneträsk were inconsistent over the most recent 200 years, even though they both reflect predominantly summer temperature influences on tree growth. We show that this was partly a result of systematic bias in MXD data measurements and partly a result of inhomogeneous sample selection from living trees (modern sample bias). We use refinements of the simple Regional Curve Standardisation (RCS) method of chronology construction to identify and mitigate these biases. The new MXD and TRW chronologies now present a largely consistent picture of long-timescale changes in past summer temperature in this region over their full length, indicating similar levels of summer warmth in the medieval period (MWP, c. CE 900–1100) and the latter half of the 20th century. Future work involving the updating of MXD chronologies using differently sourced measurements may require similar analysis and appropriate adjustment to that described here to make the data suitable for the production of un-biased RCS chronologies. The use of ‘growth-rate’ based multiple RCS curves is recommended to identify and mitigate the problem of ‘modern sample bias’. Article in Journal/Newspaper Northern Sweden University of East Anglia: UEA Digital Repository Torneträsk ENVELOPE(18.861,18.861,68.392,68.392) The Holocene 23 3 364 373 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
unknown |
description |
We describe the analysis of existing and new maximum-latewood-density (MXD) and tree-ring width (TRW) data from the Torneträsk region of northern Sweden and the construction of 1500 year chronologies. Some previous work found that MXD and TRW chronologies from Torneträsk were inconsistent over the most recent 200 years, even though they both reflect predominantly summer temperature influences on tree growth. We show that this was partly a result of systematic bias in MXD data measurements and partly a result of inhomogeneous sample selection from living trees (modern sample bias). We use refinements of the simple Regional Curve Standardisation (RCS) method of chronology construction to identify and mitigate these biases. The new MXD and TRW chronologies now present a largely consistent picture of long-timescale changes in past summer temperature in this region over their full length, indicating similar levels of summer warmth in the medieval period (MWP, c. CE 900–1100) and the latter half of the 20th century. Future work involving the updating of MXD chronologies using differently sourced measurements may require similar analysis and appropriate adjustment to that described here to make the data suitable for the production of un-biased RCS chronologies. The use of ‘growth-rate’ based multiple RCS curves is recommended to identify and mitigate the problem of ‘modern sample bias’. |
format |
Article in Journal/Newspaper |
author |
Melvin, Thomas M. Grudd, Håkan Briffa, Keith R. |
spellingShingle |
Melvin, Thomas M. Grudd, Håkan Briffa, Keith R. Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
author_facet |
Melvin, Thomas M. Grudd, Håkan Briffa, Keith R. |
author_sort |
Melvin, Thomas M. |
title |
Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
title_short |
Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
title_full |
Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
title_fullStr |
Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
title_full_unstemmed |
Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data |
title_sort |
potential bias in 'updating' tree-ring chronologies using regional curve standardisation: re-processing 1500 years of tornetrask density and ring-width data |
publishDate |
2013 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/40150/ https://doi.org/10.1177/0959683612460791 |
long_lat |
ENVELOPE(18.861,18.861,68.392,68.392) |
geographic |
Torneträsk |
geographic_facet |
Torneträsk |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Melvin, Thomas M., Grudd, Håkan and Briffa, Keith R. (2013) Potential bias in 'updating' tree-ring chronologies using regional curve standardisation: Re-processing 1500 years of Tornetrask density and ring-width data. The Holocene, 23 (3). pp. 364-373. ISSN 0959-6836 doi:10.1177/0959683612460791 |
op_doi |
https://doi.org/10.1177/0959683612460791 |
container_title |
The Holocene |
container_volume |
23 |
container_issue |
3 |
container_start_page |
364 |
op_container_end_page |
373 |
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1766147087362162688 |