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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ftnortharizonaun:oai:openknowledge.nau.edu:548 2023-05-15T14:28:01+02:00 Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables Sundqvist, H. S. Kaufman, D. S McKay, N. P. Balascio, N. L. Briner, J. P. Cwynar, L. C. Sejrup, H. P. Seppä, H. Subetto, D. A. Andrews, J. T. Axford, Y. Bakke, J. Birks, H. J. B. Brooks, S. J. de Vernal, A. Jennings, A. E. Ljungqvist, F. C. Rühland, K. M. Saenger, C. Smol, J. P. Viau, A. E. 2014 text http://openknowledge.nau.edu/548/ http://openknowledge.nau.edu/548/7/Sundqvist_HS_etal_2014_Arctic_holocene_proxy_climate_database_new_approaches.pdf https://doi.org/10.5194/cp-10-1605-2014 en eng http://openknowledge.nau.edu/548/7/Sundqvist_HS_etal_2014_Arctic_holocene_proxy_climate_database_new_approaches.pdf Sundqvist, H. S. and Kaufman, D. S and McKay, N. P. and Balascio, N. L. and Briner, J. P. and Cwynar, L. C. and Sejrup, H. P. and Seppä, H. and Subetto, D. A. and Andrews, J. T. and Axford, Y. and Bakke, J. and Birks, H. J. B. and Brooks, S. J. and de Vernal, A. and Jennings, A. E. and Ljungqvist, F. C. and Rühland, K. M. and Saenger, C. and Smol, J. P. and Viau, A. E. (2014) Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables. Climate of the Past, 10 (4). pp. 1605-1631. ISSN 1814-9332 QC Physics QE Geology Article PeerReviewed 2014 ftnortharizonaun https://doi.org/10.5194/cp-10-1605-2014 2020-12-11T11:43:41Z 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 14C-based age models from lake and marine sediments. Chron scores were calculated using the original author-reported 14C 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 and their causes. The Arctic Holocene data set is available from NOAA Paleoclimatology. Article in Journal/Newspaper Arctic Arctic Fennoscandia OpenKnowledge@NAU (Northern Arizona University, Flagstaff) Arctic Climate of the Past 10 4 1605 1631 |
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OpenKnowledge@NAU (Northern Arizona University, Flagstaff) |
op_collection_id |
ftnortharizonaun |
language |
English |
topic |
QC Physics QE Geology |
spellingShingle |
QC Physics QE Geology Sundqvist, H. S. Kaufman, D. S McKay, N. P. Balascio, N. L. Briner, J. P. Cwynar, L. C. Sejrup, H. P. Seppä, H. Subetto, D. A. Andrews, J. T. Axford, Y. Bakke, J. Birks, H. J. B. Brooks, S. J. de Vernal, A. Jennings, A. E. Ljungqvist, F. C. Rühland, K. M. Saenger, C. Smol, J. P. Viau, A. E. Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables |
topic_facet |
QC Physics QE Geology |
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 14C-based age models from lake and marine sediments. Chron scores were calculated using the original author-reported 14C 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 and their causes. The Arctic Holocene data set is available from NOAA Paleoclimatology. |
format |
Article in Journal/Newspaper |
author |
Sundqvist, H. S. Kaufman, D. S McKay, N. P. Balascio, N. L. Briner, J. P. Cwynar, L. C. Sejrup, H. P. Seppä, H. Subetto, D. A. Andrews, J. T. Axford, Y. Bakke, J. Birks, H. J. B. Brooks, S. J. de Vernal, A. Jennings, A. E. Ljungqvist, F. C. Rühland, K. M. Saenger, C. Smol, J. P. Viau, A. E. |
author_facet |
Sundqvist, H. S. Kaufman, D. S McKay, N. P. Balascio, N. L. Briner, J. P. Cwynar, L. C. Sejrup, H. P. Seppä, H. Subetto, D. A. Andrews, J. T. Axford, Y. Bakke, J. Birks, H. J. B. Brooks, S. J. de Vernal, A. Jennings, A. E. Ljungqvist, F. C. Rühland, K. M. Saenger, C. Smol, J. P. Viau, A. E. |
author_sort |
Sundqvist, H. S. |
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 |
publishDate |
2014 |
url |
http://openknowledge.nau.edu/548/ http://openknowledge.nau.edu/548/7/Sundqvist_HS_etal_2014_Arctic_holocene_proxy_climate_database_new_approaches.pdf https://doi.org/10.5194/cp-10-1605-2014 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Fennoscandia |
genre_facet |
Arctic Arctic Fennoscandia |
op_relation |
http://openknowledge.nau.edu/548/7/Sundqvist_HS_etal_2014_Arctic_holocene_proxy_climate_database_new_approaches.pdf Sundqvist, H. S. and Kaufman, D. S and McKay, N. P. and Balascio, N. L. and Briner, J. P. and Cwynar, L. C. and Sejrup, H. P. and Seppä, H. and Subetto, D. A. and Andrews, J. T. and Axford, Y. and Bakke, J. and Birks, H. J. B. and Brooks, S. J. and de Vernal, A. and Jennings, A. E. and Ljungqvist, F. C. and Rühland, K. M. and Saenger, C. and Smol, J. P. and Viau, A. E. (2014) Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables. Climate of the Past, 10 (4). pp. 1605-1631. ISSN 1814-9332 |
op_doi |
https://doi.org/10.5194/cp-10-1605-2014 |
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Climate of the Past |
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