Japan Geoscience Union Meeting 2016

Presentation information


Symbol O (Public) » Public

[O-02] Poster presentations by senior high school students

Sun. May 22, 2016 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Miwa Kuri(International Research Institute of Disaster Science, Tohoku University), Keiko Konya(Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology), Hajime Naruse(Department of Geology and Mineralogy, Graduate School of Science, Kyoto University), Kou Yamada(Waseda University)

1:45 PM - 3:15 PM

[O02-P55] Making a Sky Glow Map in and around “Luminous city Hakodate”

*Yui Okada1, Ami Hanada1 (1.Iai Girls' Junior and Senior High Shool)

Keywords:The Night Sky Brightness

We have observed night sky brightness using by Sky Quality Meter with Lens (SQM-L) and Sky Quality Meter with Lens Ethernet (SQM-LE) in and around Hakodate since 2011.We had conducted fixed point observation, moving observation at the 280 points in Hakodate for 5 years. Also, mass of point observation was conducted in 2012 October using 40 SQM-L by many students who live in and around Hakodate. Hakodate region is separated into seven regions by the night sky brightness every 0.5 magnitude by square arc seconds. Also, we observed naked eye limited magnitude and found the relationship between naked eye limited magnitude and night sky brightness at the fixed points.
Then, we published Sky Glow Map in and around “Luminous city Hakodate”.
It is considered that the night sky in and around Hakodate is not brighter than other big cities .The milky way visible area is not so far from urban area. Although, according to the result of experiments , it is considered that reflected lights by snow in winter season ,and high humidity, high concentrations of spm and pm2.5 affect the night sky brightness .