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    Arctic sea-ice decline archived by multicentury annual-resolution record from crustose coralline algal proxy (2013)
    National Academy of Sciences
    In:  PNAS Proceedings of the National Academy of Sciences of the United States of America, 110 (49). pp. 19737-19741.
    Details
    Publikationsdatum: 2016-10-25
    Beschreibung: Northern Hemisphere sea ice has been declining sharply over the past decades and 2012 exhibited the lowest Arctic summer sea-ice cover in historic times. Whereas ongoing changes are closely monitored through satellite observations, we have only limited data of past Arctic sea-ice cover derived from short historical records, indirect terrestrial proxies, and low-resolution marine sediment cores. A multicentury time series from extremely long-lived annual increment-forming crustose coralline algal buildups now provides the first high-resolution in situ marine proxy for sea-ice cover. Growth and Mg/Ca ratios of these Arctic-wide occurring calcified algae are sensitive to changes in both temperature and solar radiation. Growth sharply declines with increasing sea-ice blockage of light from the benthic algal habitat. The 646-y multisite record from the Canadian Arctic indicates that during the Little Ice Age, sea ice was extensive but highly variable on subdecadal time scales and coincided with an expansion of ice-dependent Thule/Labrador Inuit sea mammal hunters in the region. The past 150 y instead have been characterized by sea ice exhibiting multidecadal variability with a long-term decline distinctly steeper than at any time since the 14th century.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1073/pnas.1313775110
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 2
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    Multicentury algal sea-ice proxy [Environmental Sciences] (2013)
    National Academy of Sciences
    Details
    Publikationsdatum: 2013-12-04
    Beschreibung: Northern Hemisphere sea ice has been declining sharply over the past decades and 2012 exhibited the lowest Arctic summer sea-ice cover in historic times. Whereas ongoing changes are closely monitored through satellite observations, we have only limited data of past Arctic sea-ice cover derived from short historical records, indirect terrestrial...
    Print ISSN: 0027-8424
    Digitale ISSN: 1091-6490
    Thema: Biologie , Medizin , Allgemeine Naturwissenschaft
    Publiziert von National Academy of Sciences
    Standort Signatur Einschränkungen Verfügbarkeit
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    PAPER CURRENT
  • 3
    Digitale Medien
    Digitale Medien
    Utilisation of soapstone in Labrador by Indians, Eskimos and Norse (1978)
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 237-239 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Apart from the importance of cultural history in general, Labrador, because of its location at the juncture of the arctic and subarctic zones, has an intriguing prehistory. The environmental and cultural boundaries in this region have been studied as they shifted through time5"7. The Indians and ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/271237a0
    Standort Signatur Einschränkungen Verfügbarkeit
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