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Relationship between solar activity and Δ14C peaks in AD 775, AD 994, and 660 BC

  • Junghun Park (a1), John Southon (a2), Simon Fahrni (a3), Pearce Paul Creasman (a4) and Richard Mewaldt (a5)...
Abstract
ABSTRACT

Since the AD 775 and AD 994 Δ14C peak (henceforth M12) was first measured by Miyake et al. (2012, 2013), several possible production mechanisms for these spike have been suggested, but the work of Mekhaldi et al. (2015) shows that a very soft energy spectrum was involved, implying that a strong solar energetic particle (SEP) event (or series of events) was responsible. Here we present Δ14C values from AD 721–820 Sequoiadendron giganteum annual tree-ring samples from Sequoia National Park in California, USA, together with Δ14C in German oak from 650–670 BC. The AD 721–820 measurements confirm that a sharp Δ14C peak exists at AD 775, with a peak height of approximately 15‰ and show that this spike was preceded by several decades of rapidly decreasing Δ14C. A sharp peak is also present at 660 BC, with a peak height of about 10‰, and published data (Reimer et al. 2013) indicate that it too was preceded by a multi-decadal Δ14C decrease, suggesting that solar activity was very strong just prior to both Δ14C peaks and may be causally related. During periods of strong solar activity there is increased probability for coronal mass ejection (CME) events that can subject the Earth’s atmosphere to high fluencies of solar energetic particles (SEPs). Periods of high solar activity (such as one in October–November 2003) can also often include many large, fast CMEs increasing the probability of geomagnetic storms. In this paper we suggest that the combination of large SEP events and elevated geomagnetic activity can lead to enhanced production of 14C and other cosmogenic isotopes by increasing the area of the atmosphere that is irradiated by high solar energetic particles.

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This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited
Corresponding author
*Corresponding author. Email: jsouthon@uci.edu.
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N Butchart . 2014. The Brewer-Dobson circulation. Reviews of Geophysics 52:157184.

M Dee , B Pope , D Miles , S Manning , F Miyake . 2017. Supernovae and single-year anomalies in the atmospheric radiocarbon record. Radiocarbon 59(2):293302. DOI: 10.1017/RDC.2016.50.

HW Feely , H Seitz , RJ Lagomarsino , PE Biscaye . 1966. Transport and fallout of stratospheric radioactive debris. Tellus 18(2):316328.

N Gopalswamy , S Yashiro , S Krucker , G Stenborg , RA Howard . 2004. Intensity variation of large solar energetic particle events associated with coronal mass ejections. Journal of Geophysical Research 109:A12105.

N Gopalswamy , S Yashiro , G Michalek , H Xie , RP Lepping , RA Howard . 2005. Solar source of the largest geomagnetic storm of cycle 23. Geophysical Research Letters 32:L12S09. DOI: 10.1029/2004GL021639.

JT Gosling . 1993. The solar flare myth. Journal of Geophysical Research 98:1893718949.

JL Green , S Boardsen . 2006. Duration and extent of the great auroral storm of 1859. Advances in Space Research 38:130135.

VV Hambaryan , R Neuhäuser . 2013. Galactic short gamma-ray burst as cause for the 14C peak in AD 774/5. Monthly Notices of the Royal Astronomical Society 430:3236.

JR Holton , PH Haynes , ME McIntyre , AR Douglass , RB Rood , L Pfister . 1995. Stratosphere-troposphere exhange. Reviews of Gephysics 33(4):403439.

V Kurt , QA Belov , H Mavromichalaki , M Gerontidou . 2004. Statistical analysis of solar proton events. Annales Geophysicae 22:22552271.

I Levin , B Kromer , H Schoch-Fischer , M Bruns , M Münnich , D Berdau , JC Vogel , KO Münnich . 1985. 25 years of tropospheric 14C observations in Central Europe. Radiocarbon 27(1):119.

G Li , R Moore , RA Mewaldt , L Zhao , AW Labrador . 2012. A twin-CME scenario for ground level enhancement events. Space Science Reviews 171:141160.

H Maehara , T Shibayama , Y Notsu , S Notsu , S Honda , D Nogami , K Shibata . 2015. Statistical properties of superflares on solar-type stars based on 1-min cadence data. Earth, Planets and Space 67:59.

F Mekhaldi , R Muscheler , F Adolphi , A Aldahan , J Beer , JR McConnell , G Possnert , M Sigl , A Svensson , H-A Synal , KC Welten , TE Woodruff . 2015. Multiradionuclide evidence for the solar origin of the cosmic-ray events of AD 774/5 and 993/4. Nature Communications 6:8611. DOI: 10.1038/ncomms9611.

AL Melott , BC Thomas . 2012. Causes of an AD 774–775 14C increase. Nature 491:E1E2.

RA Mewaldt , CMS Cohen , AW Labrador , RA Leske , GM Mason , MI Desai , MD Looper , JE Mazur , RS Selesnick , DK Haggerty . 2005. Proton, helium, and electron spectra during the large solar particle events of October–November 2003. Journal of Geophysical Research 110:A09S18. DOI: 10.1029/2005JA011038.

R Nydal , K Lӧvseth . 1983. Tracing bomb 14C in the Atmosphere 1962–1980. Journal of Geophysical Research 88:36213642.

AK Pavlov , AV Blinov , AN Konstantinov , VM Ostryakov , GI Vasilyev , MA Vdovina , PA Volkovet . 2013. AD 775 pulse of cosmogenic radionuclides production as imprint of a galactic gamma-ray burst. MNRAS 435:28782884.

DV Reames . 1999. Particle acceleration at the sun and in the heliosphere. Space Science Reviews 90:413491.

DV Reames , SW Kahler , CK Ng . 1997. Spatial and temporal invariance in the spectra of energetic particles in gradual solar events. The Astrophysical Journal 491:414420.

PJ Reimer , E Bard , A Bayliss , JW Beck , PG Blackwell , C Bronk Ramsey , CE Buck , H Cheng , RL Edwards , M Friedrich , PM Grootes , TP Guilderson , H Haflidason , I Hajdas , C Hatte , TJ Heaton , DL Hoffman , AG Hogg , KA Hughen , KF Kaiser , B Kromer , SW Manning , M Niu , RW Reimer , DA Richards , EM Scott , JR Southon , RA Staff , CSM Turney , J van der Plicht . 2013. IntCal13 and Marine13 radiocarbon age calibration curves 0–50,000 years cal BP. Radiocarbon 55(4):18691887.

M Sigl , M Winstrup , JR McConnell , et al. 2015. Timing and climate forcing of volcanic eruptions for the past 2,500 years. Nature 523:543549.

BC Thomas , AL Melott , KR Arkenberg , BR Snyder II. 2013. Terrestrial effects of possible astrophysical sources of an AD 774–775 increase in 14C production. Geophysical Research Letters 40:12371240.

IG Usoskin , B Kromer , F Ludlow , J Beer , M Friedrich , GA Kovaltsov , SK Solanki , L Wacker . 2013. The AD775 cosmic event revisited: the Sun is to blame. Astronomy & Astrophysics 552:L3. DOI: 10.1051/0004-6361/201321080.

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