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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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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