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-P60] Light pollution in Kochi - The result of observation for three years-

*Suzuna Goda1, *Asuka Komatsu1, Shinsei Morita1 (1.Tosajuku Senior High School)

Keywords:global environment

Our astronomy club decided to investigate how much the sky in Kochi had become bright due to light pollution five years ago. Since then we have been observing the brightness of the night sky by using a device called Sky Quality Meter, SQM. On top of that, we have been using another device called SQM – LE, which was set up in our school three years ago, to observe the sky in Kochi. The research shows us that the brightness of the sky tends to change according to seasons.
We collected the date from 217 spots around Kochi – city using SQM and made a brightness map of the night sky in Kochi-city. Having examined the date, we estimated the altitude of layers to which light emitted from the surface on the earth.
In February 2016, working with the students of the club and other teachers, we investigated how many stars around Orion we can see with our naked eyes. We had actually conducted a similar investigation in February 2013. Then we compared those results and found that the visibility in the night sky became better than before. This result accorded with the one we had observed it using SQM-LE for three years.