Opin vísindi

Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Andrews, John Thomas
dc.contributor.author Jónsdóttir, Ingibjörg
dc.contributor.author Geirsdóttir, Áslaug
dc.date.accessioned 2020-09-07T14:50:41Z
dc.date.available 2020-09-07T14:50:41Z
dc.date.issued 2019-01-01
dc.identifier.citation David J. Harning, John T. Andrews, Simon T. Belt, Patricia Cabedo‐Sanz, Áslaug Geirsdóttir, Nadia Dildar, Gifford H. Miller, Julio Sepúlveda. (2019) Sea Ice Control on Winter Subsurface Temperatures of the North Iceland Shelf During the Little Ice Age: A TEX 86 Calibration Case Study. Paleoceanography and Paleoclimatology 34:6, pages 1006-1021.
dc.identifier.issn 1523-0430
dc.identifier.issn 1938-4246 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/2049
dc.description Publisher's version (útgefin grein)
dc.description.abstract We detail variations in the weight percent (wt%) of quartz, a proxy for drift ice, in fifteen marine sediment cores from the northwest, west, and southwest Iceland shelf throughout the past 10 cal ka BP. We present the first map of iceberg distributions in Iceland waters between 1983 and 2011 and a new compilation of sea-ice records in the century from 850 to 1950 CE. The wt% of quartz, determined by quantitative X-ray diffraction (qXRD) analysis, is used to evaluate changes in the importation of drift ice. Small wt% of quartz were added to milled basalt (0% quartz), and to a mixture of non-clay and clay minerals; the qXRD method replicated 0 percent quartz, while measured 1–3 percent quartz always resulted in a “presence” estimate. The outer sites in the northwest sector lie close to the average position of the sea-ice margin between 1870 and 1920 CE; the southwest shelf sites lie south of this limit. Transects of cores along the Húnaflói and Djúpáll troughs indicate that the traces of drift ice decrease rapidly landward from the outer sites. The cores from the west/southwest of Iceland have limited amounts of quartz, generally possibly limited incursions of drift ice.
dc.description.sponsorship JTA acknowledges the support of the National Science Foundation for much of the qXRD data reported here. Wendy Roth is acknowledged for her assistance in the XRD Laboratory and several undergraduate research assistants have throughout the years been extremely helpful in running samples from the cores used in this study. Cruise B997 was supported by the Iceland Marine Institute and NSF grant ATM-9531397 and the MD99 Marion Dufresne cruise was in part supported by NSF-OCE and by The Icelandic Research Center (RANNIS). RANNIS supported the Icelandic research on MD99-2264 and MD99-2269. We thank the editor Dr. Anne E. Jennings, Dr. John Jaeger, and two other reviewers for the time and effort in making substantive recommendations for the improvement of the article.
dc.format.extent 96-114
dc.language.iso en
dc.publisher Informa UK Limited
dc.relation.ispartofseries Arctic, Antarctic, and Alpine Research;51(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Drift ice
dc.subject Holocene
dc.subject Icebergs
dc.subject Iceland
dc.subject Quartz weight percent
dc.subject Sea ice
dc.subject Hafís
dc.subject Rekís
dc.subject Nýlífsöld
dc.subject Kvars
dc.title Tracking Holocene drift-ice limits on the northwest–southwest Iceland shelf: Comparing proxy data with observation and historical evidence
dc.type info:eu-repo/semantics/article
dcterms.license This is an open access article distributed under the terms of the Creative Commons CC BY license, which permits unrestricted use, distribution, reproduction in any medium, provided the original work is properly cited.
dc.description.version Peer Reviewed
dc.identifier.journal Arctic, Antarctic, and Alpine Research
dc.identifier.doi 10.1080/15230430.2019.1592648
dc.relation.url https://www.tandfonline.com/doi/full/10.1080/15230430.2019.1592648
dc.contributor.department Jarðvísindadeild (HÍ)
dc.contributor.department Faculty of Earth Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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