Japan Geoscience Union Meeting 2019

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[E] Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM12] Space Weather and Space Climate

Tue. May 28, 2019 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Ryuho Kataoka(National Institute of Polar Research), Antti A Pulkkinen(NASA Goddard Space Flight Center), Kanya Kusano(Institute for Space-Earth Environmental Research, Nagoya University), Kaori Sakaguchi(National Institute of Information and Communications Technology)

[PEM12-P09] High-precision measurement of carbon-14 in tree rings around the onset of the Maunder Minimum

*Hiroko Miyahara1, Fuyuki Tokanai2, Toru Moriya2, Hideyuki Hotta3 (1.Musashino Art University, 2.Yamagata University, 3.Chiba University)

Keywords:solar cycle, grand minima, cosmogenic nuclide

It is well known that the Sun indicates long-term variations at time scales of a few hundred years to a few millennia. It sometimes brings the grand minima, at which period the sunspots disappear for more than several decades. The detailed process of such long-lasting disappearance of sunspots, however, remains unclear. We therefore have been trying to reconstruct solar cycles around the onset of grand minima based on high-precision measurement of carbon-14 in tree rings. In this paper, we report on our preliminary result on the measurement of carbon-14 around the onset of the Maunder Minimum.