過去の環境変動

人間の経済的活動にによって空気中の二酸化炭素などの温室効果ガスが増加し，これから地球の表層部の温度はどんどんあがるらしい。あれ？うそっ。だって子どもの頃，今の地球は温暖期で，その内，また氷期がやってくるって習ったよ？

というわけで，結局何がホントで何が間違っているかは，「習った内容」がどういうデータ・理解によって確立されたか（されてないか）知っておく必要があるわけです。

過去の環境変動を湖沼堆積物を用いて研究するプロジェクトに参加して，主としてルミネッセンス法を用いた年代決定に貢献しています。実際は貢献というよりはまだ基礎実験を行っている状態ですが，いろいろ勉強できるし，東アジアに「同じ釜の飯を食う」友だち（？）ができる醍醐味があります。

いくつかの成果

Noriko Hasebe, Taeko Itono, Kota Katsuki, Takuma Murakami, Shinya Ochiai, Nagayoshi Katsuta, Yong Wang, Jin Young Lee, Keisuke Fukushi, Yoshihiro Ganzawa, Muneki Mitamura, Kuniaki Tanaka, Ju Yong Kim, Ji Shen, and Kenji Kashiwaya, Possible age models for Lake Onuma lacustrine sediments based on tuffs recovered in three cores, Earth surface processes and environmental changes in East Asia – records from lake-catchment systems, Springer, accepted, 2015

Keisuke Fukushi, Nagayoshi Katsuta, Robert G. Jenkins, Kosuke Matsubara, Bunta Takayama, Yukiya Tanaka, Davaasuren Davaadorj, Ochirbat Batkhishig, Noriko Hasebe and Kenji Kashiwaya, Centennial-scale environmental changes in Terhiin Tsagaan Lake, Mongolia inferred from lacustrine sediment: preliminary results, in Earth surface processes and environmental changes in East Asia – records from lake-catchment systems, Springer , accepted, 2015

Kazumi Ito, Toru Tamura, Noriko Hasebe, Toshio Nakamura, Shoji Arai, Manabu Ogata, Taeko Itono, Kenji Kashiwaya, Comparison of luminescence dating methods on lake sediments from a small catchment: Example from Lake Yogo, Japan, in Earth surface processes and environmental changes in East Asia – records from lake-catchment systems, Springer , accepted, 2015

Noriko Hasebe, Ayako Inagaki, Noritaka Endo, Keisuke Fukushi, Kazumi Ito and Kenji Kashiwaya, Thermoluminescence color image analysis of sediments from Lake Khuvsgul, Mongolia, and its potential to investigate paleoenvironmental change, Quaternary Geochronology, 10, 156–159 2012

Sergey Krivonogov, Sangheon Yi, Kenji Kashiwaya, Jincheul Kim ,Narantsetseg T, Oyunchimeg T, Inna Safonova, Alexey Kazansky, Tatiana Sitnikova, Juyong Kim, Noriko Hasebe, Solved and unsolved problems of sedimentation, glaciation and paleolakes of the Darhad Basin, Northern Mongolia, Quaternary Science Reviews, 56, 142-163, 2012

Noriko Hasebe, Kazumi Ito, Akihiro Hasebe, Narantsetseg TS, Oyunchimeg TS, Egor V. Ivanov, Kenji Kashiwaya, K-Ar age of basement basalt of HDP09 core from Lake Khuvsgul, Mongolia: Implication to estimate the beginning of Baikal rift zone, Journal of Earth Environment, 2, 462-466, 2011

K. Kashiwaya, S. Ochiai, G. Sumino, T. Tsukamoto, A. Szyniszewska, M. Yamamoto, A. Sakaguchi, N. Hasebe, H. Sakai, T. Watanabe, T. Kawai, Climato-hydrological fluctuations printed in long lacustrine records in Lake Hovsgol, Mongolia, Quaternary International, 219, 178-187, 2010

稲垣亜矢子，長谷部徳子，遠藤徳孝，伊藤一充，湯本仁亭，柏谷健二，湖沼堆積物の熱ルミネセンスデジタル写真撮影とその色特性，（Thermoluminescence digital images of lake sediments and their color characteristics）地質学雑誌 116, XIX-XX, 2010

Kazumi Ito, Noriko Hasebe, Ryosuke Sumita, Shoji Arai, Masayoshi Yamamoto, Kenji Kashiwaya, Yoshihiro Ganzawa, LA-ICP-MS analysis of pressed powder pellets to luminescence geochronology, Chemical Geology, 262, 131-137,2009

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