Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

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 9:00 AM - 10:30 AM A04 (TOKYO BAY MAKUHARI HALL)

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), Chairperson:Ryuho Kataoka(National Institute of Polar Research)

10:00 AM - 10:15 AM

[PEM12-29] Solar modulation of galactic cosmic rays during grand minima: A hybrid simulation

*Shoko Miyake1, Tomoaki Matsumoto2,3, Ryuho Kataoka4,5, Tatsuhiko Sato6, Daikou Shiota7, Hiroko Miyahara8, Shinsuke Imada9, Haruka Ueno10 (1.NIT, Ibaraki College, 2.Hosei Univ., 3.Princeton Univ., 4.NIPR, 5.SOKENDAI, 6.JAEA, 7.NICT, 8.Musashino Art Univ., 9.Nagoya Univ., 10.JAXA)

Keywords:galactic cosmic ray, solar wind

In the current and next weak solar cycles, we expect higher flux of galactic cosmic rays than that in the previous solar cycles because of the decreasing trend of the solar activity. It is important to quantitatively evaluate the high flux of galactic cosmic rays because it leads to the increase in the radiation exposure of aircrews and the increasing rates of single event upset events at spacecraft. However, reliable prediction of the increasing galactic cosmic rays in upcoming weak solar cycles is a challenges topic in the field of space weather forecast. We introduce a new project called Grand Minimum 7 (Gm7) for developing a hybrid simulation of galactic cosmic rays in such a weak solar condition, solving the stochastic differential equations of energetic particles in the MHD solar wind resolved by adaptive mesh refinement technique. We also discuss the possible situation of galactic cosmic rays and the radiation dose during the grand minima such as Maunder Minimum.