About YAMAKAWA SHUJI
About ONO TAKAYUKI
About 東京消防庁
About 日本大学文理学部自然科学研究所研究紀要
About solar activity(phenomenon)
About periodic variation
About tropical zone
About ocean
About cumulus convection
About cloud amount
About cumulus
About Climatology,climatic change
About Solar system in general
About 太陽活動
About 周期変動
About 熱帯地域
About 雲
About 活動
About 関連性