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

Type Article
Date 2014-08-29
Language English
Author(s) Sundqvist H. S.1, 2, Kaufman D. S.3, McKay N. P.3, Balascio N. L.4, Briner J. P.5, Cwynar L. C.6, Sejrup H. P.7, Seppa H.8, Subetto D. A.9, 10, 11, Andrews J. T.12, Axford Y.13, Bakke J.7, 14, Birks H. J. B.15, 16, 17, Brooks S. J.18, de Vernal A.19, Jennings A. E.12, Ljungqvist F. C.2, 20, Ruehland K. M.21, Saenger C.22, Smol J. P.21, Viau A. E.23
Affiliation(s) 1 : Stockholm Univ, Dept Phys Geog & Quaternary, S-10691 Stockholm, Sweden.
2 : Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden.
3 : No Arizona Univ, Sch Earth Sci & Environm Sustainabil, Flagstaff, AZ 86011 USA.
4 : Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
5 : SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA.
6 : Univ New Brunswick, Dept Biol, Fredericton, NB E3B 6E1, Canada.
7 : Univ Bergen, Dept Earth Sci, Bergen, Norway.
8 : Univ Helsinki, Dept Geosci & Geog, Helsinki, Finland.
9 : Russian Acad Sci, Karelian Res Ctr, Northern Water Problems Inst, Petrozavodsk, Russia.
10 : Herzen State Pedag Univ Russia, St Petersburg, Russia.
11 : Kazan Fed Univ, Kazan, Russia.
12 : Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
13 : Northwestern Univ, Dept Earth & Planetary Sci, Evanston, IL 60208 USA.
14 : Univ Bergen, Bjerknes Ctr Climate Res, Bergen, Norway.
15 : Univ Bergen, Dept Biol, Bergen, Norway.
16 : UCL, Environm Change Res Ctr, London WC1E 6BT, England.
17 : Univ Oxford, Sch Geog & Environm, London, England.
18 : Nat Hist Museum, Dept Life Sci, London SW7 5BD, England.
19 : Univ Quebec, Geotop, Montreal, PQ H3C 3P8, Canada.
20 : Stockholm Univ, Dept Hist, S-10691 Stockholm, Sweden.
21 : Queens Univ, Dept Biol, PEARL, Kingston, ON K7L 3N6, Canada.
22 : Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA.
23 : Univ Ottawa, Dept Geog, Ottawa, ON K1N 6N5, Canada.
Source Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2014-08-29 , Vol. 10 , N. 4 , P. 1605-1631
DOI 10.5194/cp-10-1605-2014
WOS© Times Cited 76
Abstract 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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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. (2014). Arctic Holocene proxy climate database - new approaches to assessing geochronological accuracy and encoding climate variables. Climate Of The Past, 10(4), 1605-1631. Publisher's official version : https://doi.org/10.5194/cp-10-1605-2014 , Open Access version : https://archimer.ifremer.fr/doc/00291/40216/