Japan Geoscience Union Meeting 2015

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International Session (Poster)

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

[P-EM07] Space Weather, Space Climate, and VarSITI

Tue. May 26, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Ryuho Kataoka(National Institute of Polar Research), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Yoshizumi Miyoshi(Solar-Terrestrial Environement Laboratory, Nagoya University), Toshifumi Shimizu(Institute of Space and Astronautical Science, JAXA), Ayumi Asai(Unit for Synergetic Studies of Space, Kyoto University), Hidekatsu Jin(National Institude of Information and Communications Technology), Tatsuhiko Sato(Japan Atomic Energy Agency), Kanya Kusano(Solar-Terrestrial Environment Laboratory, Nagoya University), Hiroko Miyahara(College of Art and Design, Musashino Art University), Takuji Nakamura(National Institute of Polar Research), Kazuo Shiokawa(Solar-Terrestrial Environment Laboratory, Nagoya University), Kiminori Itoh(Graduate School of Engineering, Yokohama National University)

6:15 PM - 7:30 PM

[PEM07-P09] Study of process of the generation and disappearance of coronal holes using tracking module

*Ohzora KANO1, Shinsuke IMADA1, Shinobu MACHIDA1 (1.Solar-Terrestrial Environment Laboratory, Nagoya University)

Keywords:coronal hole, automatic detection, mercator map

We have developed the automatic tracking module, which tracks the time variation of coronal holes based on the data from Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO) satellite and Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) on board two Solar TErrestrial RElations Observatory (STEREO) satellites. We have analyzed the process of the generation and disappearance of coronal holes using the module. The module has four main functions. (1)creating the Mercator map of the sun full, using the data from three satellites. (2)detect the regions of the coronal hole candidates by the intensity threshold. (3)remove the micro region by the size threshold and determine the regions which are tracked. (4)detect the same regions as determined one and track them on the Mercator map.
Because we always observe the sun full, we can track the coronal holes continuously. Therefore, We discuss how a coronal hole generate and how the hole disappear over six months.