Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables

We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58° N latitude where proxy time series extend back at least to 6 cal ka (all ages in this article are in calendar years before present – BP), are resolved...

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Published in:Climate of the Past
Main Authors: H. S. Sundqvist, D. S. Kaufman, N. P. McKay, N. L. Balascio, J. P. Briner, L. C. Cwynar, H. P. Sejrup, H. Seppä, D. A. Subetto, J. T. Andrews, Y. Axford, J. Bakke, H. J. B. Birks, S. J. Brooks, A. de Vernal, A. E. Jennings, F. C. Ljungqvist, K. M. Rühland, C. Saenger, J. P. Smol, A. E. Viau
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2014
Subjects:
Online Access:https://doi.org/10.5194/cp-10-1605-2014
https://doaj.org/article/87a876f8361446649ff80e989871f705
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spelling ftdoajarticles:oai:doaj.org/article:87a876f8361446649ff80e989871f705 2023-05-15T14:50:09+02:00 Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables H. S. Sundqvist D. S. Kaufman N. P. McKay N. L. Balascio J. P. Briner L. C. Cwynar H. P. Sejrup H. Seppä D. A. Subetto J. T. Andrews Y. Axford J. Bakke H. J. B. Birks S. J. Brooks A. de Vernal A. E. Jennings F. C. Ljungqvist K. M. Rühland C. Saenger J. P. Smol A. E. Viau 2014-08-01T00:00:00Z https://doi.org/10.5194/cp-10-1605-2014 https://doaj.org/article/87a876f8361446649ff80e989871f705 EN eng Copernicus Publications http://www.clim-past.net/10/1605/2014/cp-10-1605-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1605-2014 https://doaj.org/article/87a876f8361446649ff80e989871f705 Climate of the Past, Vol 10, Iss 4, Pp 1605-1631 (2014) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2014 ftdoajarticles https://doi.org/10.5194/cp-10-1605-2014 2022-12-31T06:52:28Z We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58° N latitude where proxy time series extend back at least to 6 cal ka (all ages in this article are in calendar years before present – BP), are resolved at submillennial scale (at least one value every 400 ± 200 years) and have age models constrained by at least one age every 3000 years. In addition to conventional metadata for each proxy record (location, proxy type, reference), we include two novel parameters that add functionality to the database. First, "climate interpretation" is a series of fields that logically describe the specific climate variable(s) represented by the proxy record. It encodes the proxy–climate relation reported by authors of the original studies into a structured format to facilitate comparison with climate model outputs. Second, "geochronology accuracy score" (chron score) is a numerical rating that reflects the overall accuracy of 14 C-based age models from lake and marine sediments. Chron scores were calculated using the original author-reported 14 C ages, which are included in this database. The database contains 320 records (some sites include multiple records) from six regions covering the circumpolar Arctic: Fennoscandia is the most densely sampled region (31% of the records), whereas only five records from the Russian Arctic met the criteria for inclusion. The database contains proxy records from lake sediment (60%), marine sediment (32%), glacier ice (5%), and other sources. Most (61%) reflect temperature (mainly summer warmth) and are primarily based on pollen, chironomid, or diatom assemblages. Many (15%) reflect some aspect of hydroclimate as inferred from changes in stable isotopes, pollen and diatom assemblages, humification index in peat, and changes in equilibrium-line altitude of glaciers. This comprehensive database can be used in future studies to investigate the spatio-temporal pattern of Arctic Holocene climate changes ... Article in Journal/Newspaper Arctic Fennoscandia Directory of Open Access Journals: DOAJ Articles Arctic Climate of the Past 10 4 1605 1631
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Environmental pollution
TD172-193.5
Environmental protection
TD169-171.8
Environmental sciences
GE1-350
spellingShingle Environmental pollution
TD172-193.5
Environmental protection
TD169-171.8
Environmental sciences
GE1-350
H. S. Sundqvist
D. S. Kaufman
N. P. McKay
N. L. Balascio
J. P. Briner
L. C. Cwynar
H. P. Sejrup
H. Seppä
D. A. Subetto
J. T. Andrews
Y. Axford
J. Bakke
H. J. B. Birks
S. J. Brooks
A. de Vernal
A. E. Jennings
F. C. Ljungqvist
K. M. Rühland
C. Saenger
J. P. Smol
A. E. Viau
Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
topic_facet Environmental pollution
TD172-193.5
Environmental protection
TD169-171.8
Environmental sciences
GE1-350
description We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58° N latitude where proxy time series extend back at least to 6 cal ka (all ages in this article are in calendar years before present – BP), are resolved at submillennial scale (at least one value every 400 ± 200 years) and have age models constrained by at least one age every 3000 years. In addition to conventional metadata for each proxy record (location, proxy type, reference), we include two novel parameters that add functionality to the database. First, "climate interpretation" is a series of fields that logically describe the specific climate variable(s) represented by the proxy record. It encodes the proxy–climate relation reported by authors of the original studies into a structured format to facilitate comparison with climate model outputs. Second, "geochronology accuracy score" (chron score) is a numerical rating that reflects the overall accuracy of 14 C-based age models from lake and marine sediments. Chron scores were calculated using the original author-reported 14 C ages, which are included in this database. The database contains 320 records (some sites include multiple records) from six regions covering the circumpolar Arctic: Fennoscandia is the most densely sampled region (31% of the records), whereas only five records from the Russian Arctic met the criteria for inclusion. The database contains proxy records from lake sediment (60%), marine sediment (32%), glacier ice (5%), and other sources. Most (61%) reflect temperature (mainly summer warmth) and are primarily based on pollen, chironomid, or diatom assemblages. Many (15%) reflect some aspect of hydroclimate as inferred from changes in stable isotopes, pollen and diatom assemblages, humification index in peat, and changes in equilibrium-line altitude of glaciers. This comprehensive database can be used in future studies to investigate the spatio-temporal pattern of Arctic Holocene climate changes ...
format Article in Journal/Newspaper
author H. S. Sundqvist
D. S. Kaufman
N. P. McKay
N. L. Balascio
J. P. Briner
L. C. Cwynar
H. P. Sejrup
H. Seppä
D. A. Subetto
J. T. Andrews
Y. Axford
J. Bakke
H. J. B. Birks
S. J. Brooks
A. de Vernal
A. E. Jennings
F. C. Ljungqvist
K. M. Rühland
C. Saenger
J. P. Smol
A. E. Viau
author_facet H. S. Sundqvist
D. S. Kaufman
N. P. McKay
N. L. Balascio
J. P. Briner
L. C. Cwynar
H. P. Sejrup
H. Seppä
D. A. Subetto
J. T. Andrews
Y. Axford
J. Bakke
H. J. B. Birks
S. J. Brooks
A. de Vernal
A. E. Jennings
F. C. Ljungqvist
K. M. Rühland
C. Saenger
J. P. Smol
A. E. Viau
author_sort H. S. Sundqvist
title Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
title_short Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
title_full Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
title_fullStr Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
title_full_unstemmed Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
title_sort arctic holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables
publisher Copernicus Publications
publishDate 2014
url https://doi.org/10.5194/cp-10-1605-2014
https://doaj.org/article/87a876f8361446649ff80e989871f705
geographic Arctic
geographic_facet Arctic
genre Arctic
Fennoscandia
genre_facet Arctic
Fennoscandia
op_source Climate of the Past, Vol 10, Iss 4, Pp 1605-1631 (2014)
op_relation http://www.clim-past.net/10/1605/2014/cp-10-1605-2014.pdf
https://doaj.org/toc/1814-9324
https://doaj.org/toc/1814-9332
1814-9324
1814-9332
doi:10.5194/cp-10-1605-2014
https://doaj.org/article/87a876f8361446649ff80e989871f705
op_doi https://doi.org/10.5194/cp-10-1605-2014
container_title Climate of the Past
container_volume 10
container_issue 4
container_start_page 1605
op_container_end_page 1631
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