| Registro completo |
| Provedor de dados: |
5
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| País: |
France
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| Título: |
Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables
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| Autores: |
Sundqvist, H. S.
Kaufman, D. S.
Mckay, N. P.
Balascio, N. L.
Briner, J. P.
Cwynar, L. C.
Sejrup, H. P.
Seppa, 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.
Ruehland, K. M.
Saenger, C.
Smol, J. P.
Viau, A. E.
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| Data: |
2014-08-29
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| Ano: |
2014
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| Resumo: |
We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58 degrees 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 meta-data 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 C-14-based age models from lake and marine sediments. Chron scores were calculated using the original author-reported C-14 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00291/40216/38682.pdf
https://archimer.ifremer.fr/doc/00291/40216/38683.zip
DOI:10.5194/cp-10-1605-2014
https://archimer.ifremer.fr/doc/00291/40216/
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| Editor: |
Copernicus Gesellschaft Mbh
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| Formato: |
application/pdf
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| Fonte: |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2014-08-29 , Vol. 10 , N. 4 , P. 1605-1631
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| Direitos: |
Author(s) 2014. CC Attribution 3.0 License
info:eu-repo/semantics/openAccess
restricted use
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