Search for annual14C excursions in the past

Fusa Miyake; Kimiaki Masuda; Toshio Nakamura; Katsuhiko Kimura; Masataka Hakozaki; A. J.Timothy Jull; Todd E. Lange; Richard Cruz; Irina P. Panyushkina; Chris Baisan; Matthew W. Salzer

doi:10.1017/RDC.2016.54

Search for annual¹⁴C excursions in the past

Fusa Miyake, Kimiaki Masuda, Toshio Nakamura, Katsuhiko Kimura, Masataka Hakozaki, A. J.Timothy Jull, Todd E. Lange, Richard Cruz, Irina P. Panyushkina, Chris Baisan, Matthew W. Salzer

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Two radiocarbon excursions (AD 774-775 and AD 993-994) occurred due to an increase of incoming cosmic rays on a short timescale. The most plausible cause of these events is considered to be extreme solar proton events (SPE). It is possible that there are other annual¹⁴C excursions in the past that have yet to be confirmed. In order to detect more of these events, we measured the¹⁴C contents in bristlecone pine tree-ring samples during the periods when the rate of¹⁴C increase in the IntCal data is large. We analyzed four periods every other year (2479-2455 BC, 4055-4031 BC, 4465-4441 BC, and 4689-4681 BC), and found no anomalous¹⁴C excursions during these periods. This study confirms that it is important to do continuous measurements to find annual cosmic-ray events at other locations in the tree-ring record.

Original language	English (US)
Pages (from-to)	315-320
Number of pages	6
Journal	Radiocarbon
Volume	59
Issue number	2
DOIs	https://doi.org/10.1017/RDC.2016.54
State	Published - Apr 1 2017

Keywords

Annual cosmic-ray event
Cosmogenic nuclides

ASJC Scopus subject areas

Archaeology
General Earth and Planetary Sciences

Access to Document

10.1017/RDC.2016.54

Cite this

@article{224edbeef04141ada467e787954509ad,

title = "Search for annual14C excursions in the past",

abstract = "Two radiocarbon excursions (AD 774-775 and AD 993-994) occurred due to an increase of incoming cosmic rays on a short timescale. The most plausible cause of these events is considered to be extreme solar proton events (SPE). It is possible that there are other annual14C excursions in the past that have yet to be confirmed. In order to detect more of these events, we measured the14C contents in bristlecone pine tree-ring samples during the periods when the rate of14C increase in the IntCal data is large. We analyzed four periods every other year (2479-2455 BC, 4055-4031 BC, 4465-4441 BC, and 4689-4681 BC), and found no anomalous14C excursions during these periods. This study confirms that it is important to do continuous measurements to find annual cosmic-ray events at other locations in the tree-ring record.",

keywords = "Annual cosmic-ray event, Cosmogenic nuclides",

author = "Fusa Miyake and Kimiaki Masuda and Toshio Nakamura and Katsuhiko Kimura and Masataka Hakozaki and Jull, {A. J.Timothy} and Lange, {Todd E.} and Richard Cruz and Panyushkina, {Irina P.} and Chris Baisan and Salzer, {Matthew W.}",

note = "Publisher Copyright: {\textcopyright} 2016 by the Arizona Board of Regents on behalf of the University of Arizona.",

year = "2017",

month = apr,

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doi = "10.1017/RDC.2016.54",

language = "English (US)",

volume = "59",

pages = "315--320",

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AU - Miyake, Fusa

AU - Masuda, Kimiaki

AU - Nakamura, Toshio

AU - Kimura, Katsuhiko

AU - Hakozaki, Masataka

AU - Jull, A. J.Timothy

AU - Lange, Todd E.

AU - Cruz, Richard

AU - Panyushkina, Irina P.

AU - Baisan, Chris

AU - Salzer, Matthew W.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Two radiocarbon excursions (AD 774-775 and AD 993-994) occurred due to an increase of incoming cosmic rays on a short timescale. The most plausible cause of these events is considered to be extreme solar proton events (SPE). It is possible that there are other annual14C excursions in the past that have yet to be confirmed. In order to detect more of these events, we measured the14C contents in bristlecone pine tree-ring samples during the periods when the rate of14C increase in the IntCal data is large. We analyzed four periods every other year (2479-2455 BC, 4055-4031 BC, 4465-4441 BC, and 4689-4681 BC), and found no anomalous14C excursions during these periods. This study confirms that it is important to do continuous measurements to find annual cosmic-ray events at other locations in the tree-ring record.

AB - Two radiocarbon excursions (AD 774-775 and AD 993-994) occurred due to an increase of incoming cosmic rays on a short timescale. The most plausible cause of these events is considered to be extreme solar proton events (SPE). It is possible that there are other annual14C excursions in the past that have yet to be confirmed. In order to detect more of these events, we measured the14C contents in bristlecone pine tree-ring samples during the periods when the rate of14C increase in the IntCal data is large. We analyzed four periods every other year (2479-2455 BC, 4055-4031 BC, 4465-4441 BC, and 4689-4681 BC), and found no anomalous14C excursions during these periods. This study confirms that it is important to do continuous measurements to find annual cosmic-ray events at other locations in the tree-ring record.

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KW - Cosmogenic nuclides

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