GennarettiArseneaultNicaultEtAl2014

Référence

Gennaretti, F., Arseneault, D., Nicault, A., Perreault, L. and Begin, Y. (2014) Volcano-induced regime shifts in millennial tree-ring chronologies from northeastern North America. Proceedings of the National Academy of Sciences of the United States of America, 111(28):10077-10082. (Scopus )

Résumé

Dated records of ice-cap growth from Arctic Canada recently suggested that a succession of strong volcanic eruptions forced an abrupt onset of the Little Ice Age between A.D. 1275 and 1300 [Miller GH, et al. (2012) Geophys Res Lett 39(2):L02708, 10.1029/2011GL050168]. Although this idea is supported by simulation experiments with general circulation models, additional support from field data are limited. In particular, the Northern Hemisphere network of temperature-sensitive millennial tree-ring chronologies, which principally comprises Eurasian sites, suggests that the strongest eruptions only caused cooling episodes lasting less than about 10 y. Here we present a new network of millennial tree-ring chronologies from the taiga of northeastern North America, which fills a wide gap in the network of the Northern Hemisphere's chronologies suitable for temperature reconstructions and supports the hypothesis that volcanoes triggered both the onset and the coldest episode of the Little Ice Age. Following the well-expressed Medieval Climate Anomaly (approximately A.D. 910-1257), which comprised the warmest decades of the last millennium, our tree-ring-based temperature reconstruction displays an abrupt regime shift toward lower average summer temperatures precisely coinciding with a series of 13th century eruptions centered around the 1257 Samalas event and closely preceding ice-cap expansion in Arctic Canada. Furthermore, the successive 1809 (unknown volcano) and 1815 (Tambora) eruptions triggered a subsequent shift to the coldest 40-y period of the last 1100 y. These results confirm that series of large eruptions may cause region-specific regime shifts in the climate system and that the climate of northeastern North America is especially sensitive to volcanic forcing.

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@ARTICLE { GennarettiArseneaultNicaultEtAl2014,
    AUTHOR = { Gennaretti, F. and Arseneault, D. and Nicault, A. and Perreault, L. and Begin, Y. },
    TITLE = { Volcano-induced regime shifts in millennial tree-ring chronologies from northeastern North America },
    JOURNAL = { Proceedings of the National Academy of Sciences of the United States of America },
    YEAR = { 2014 },
    VOLUME = { 111 },
    PAGES = { 10077-10082 },
    NUMBER = { 28 },
    NOTE = { cited By 5 },
    ABSTRACT = { Dated records of ice-cap growth from Arctic Canada recently suggested that a succession of strong volcanic eruptions forced an abrupt onset of the Little Ice Age between A.D. 1275 and 1300 [Miller GH, et al. (2012) Geophys Res Lett 39(2):L02708, 10.1029/2011GL050168]. Although this idea is supported by simulation experiments with general circulation models, additional support from field data are limited. In particular, the Northern Hemisphere network of temperature-sensitive millennial tree-ring chronologies, which principally comprises Eurasian sites, suggests that the strongest eruptions only caused cooling episodes lasting less than about 10 y. Here we present a new network of millennial tree-ring chronologies from the taiga of northeastern North America, which fills a wide gap in the network of the Northern Hemisphere's chronologies suitable for temperature reconstructions and supports the hypothesis that volcanoes triggered both the onset and the coldest episode of the Little Ice Age. Following the well-expressed Medieval Climate Anomaly (approximately A.D. 910-1257), which comprised the warmest decades of the last millennium, our tree-ring-based temperature reconstruction displays an abrupt regime shift toward lower average summer temperatures precisely coinciding with a series of 13th century eruptions centered around the 1257 Samalas event and closely preceding ice-cap expansion in Arctic Canada. Furthermore, the successive 1809 (unknown volcano) and 1815 (Tambora) eruptions triggered a subsequent shift to the coldest 40-y period of the last 1100 y. These results confirm that series of large eruptions may cause region-specific regime shifts in the climate system and that the climate of northeastern North America is especially sensitive to volcanic forcing. },
    AUTHOR_KEYWORDS = { Black spruce; Dendroclimatology; Lake subfossil trees; Picea mariana; Temperature regime shifts },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1073/pnas.1324220111 },
    KEYWORDS = { article; Bayes theorem; black spruce; Canada; climate; cooling; dendrochronology; environmental change; environmental temperature; ice cap; Little Ice Age; Medieval Warm Period; millennial tree ring chronology; nonhuman; priority journal; regime shift; summer; temperature related phenomena; tree growth; volcano; warming, black spruce; dendroclimatology; lake subfossil trees; Picea mariana; temperature regime shifts, Canada; Climate Change; Models, Biological; Trees; Volcanic Eruptions },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84904332003&partnerID=40&md5=665dd8f63a8849b30b860d52478601e8 },
}

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