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| Titel |
Tree ring effects and ice core acidities clarify the volcanic record of the first millennium |
| VerfasserIn |
M. G. L. Baillie, J. McAneney |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 11, no. 1 ; Nr. 11, no. 1 (2015-01-16), S.105-114 |
| Datensatznummer |
250117121
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| Publikation (Nr.) |
 copernicus.org/cp-11-105-2015.pdf |
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| Zusammenfassung |
| In 2012 Plummer et al., in presenting the volcanic chronology of the
Antarctic Law Dome ice core, chose to list connections to acid layers in
other ice cores and also possible chronological coincidences between ice acid
dates and the precise dates of frost damage, and/or reduced growth in North
American bristlecone pines. We disagree with the chronological links
indicated by Plummer et al. for the period before AD 700, and in this paper
we show that a case can be made that better linkages between ice acid and
tree ring effects occur for this period if the ice chronologies are
systematically moved forward by around 7 years, consistent with a hypothesis
published by Baillie in 2008. In the paper we seek to explore
the proposition that frost damage rings in North American bristlecone pines
are a very useful indicator of the dates of certain large explosive volcanic
eruptions; the dating of major eruptions being critical for any clear
understanding of volcanic forcing. This paper cannot prove that there is an
error in the Greenland Ice Core Chronology 2005 (GICC05), and in equivalent
ice chronologies from the Antarctic, however, it does provide a coherent
argument for an apparent ice dating offset. If the suggested offset were to
prove correct it would be necessary to locate where the error occurs in the
ice chronologies and in this regard the dating of the increasingly
controversial Icelandic Eldgjá eruption in the AD 930s, and the
China/Korean Millennium eruption which occurs some 7 years after Eldgjá,
may well be critical. In addition, if the offset were to be substantiated it
would have implications for the alleged identification of tephra at 429.3 m
in the Greenland GRIP core, currently attributed to the Italian volcano
Vesuvius and used as a critical zero error point in the GICC05 chronology. |
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