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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 13

琵琶湖湖底コア, 年間珪藻殻堆積量から見た過去14万年間の日本の夏季降水量変動と東アジアモンスーン

https://doi.org/10.18999/sumrua.13.61
https://doi.org/10.18999/sumrua.13.61
db9bc514-08b1-4583-b00e-584840b91779
名前 / ファイル ライセンス アクション
KJ00000187435.pdf KJ00000187435.pdf (613.7 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2010-05-31
タイトル
タイトル 琵琶湖湖底コア, 年間珪藻殻堆積量から見た過去14万年間の日本の夏季降水量変動と東アジアモンスーン
その他のタイトル
その他のタイトル A record of summer precipitation for the past 140 ka based on diatom valve flux from Lake Biwa, Japan and its relationship with the East Asian paleomonsoon
著者 加, 三千宣

× 加, 三千宣

WEKO 81266

加, 三千宣

Search repository
Kuwae, Michinobu

× Kuwae, Michinobu

WEKO 81267

Kuwae, Michinobu

Search repository
吉川, 周作

× 吉川, 周作

WEKO 81268

吉川, 周作

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Yoshikawa, Shusaku

× Yoshikawa, Shusaku

WEKO 81269

Yoshikawa, Shusaku

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井内, 美朗

× 井内, 美朗

WEKO 81270

井内, 美朗

Search repository
Inouchi, Yoshio

× Inouchi, Yoshio

WEKO 81271

Inouchi, Yoshio

Search repository
権利
権利情報 名古屋大学年代測定資料研究センター
権利
権利情報 本文データは学協会の許諾に基づきCiNiiから複製したものである
抄録
内容記述 Records of East Asian summer monsoon changes has been revealed widely from China and Tibetan Plateau. In Japanese Islands, however, there is less record of summer precipitation. Therefore, relationship between the East Asian summer monsoon changes in China and the summer precipitation changes in Japanese Islands is still unclear. Here, we examine diatom valve flux in lacustrine sediment of Lake Biwa for the past 140ka using the 140-m core, and to test it possibility as a proxy for summer precipitation. Furthermore, we discuss the relationship between the East Asian summer monsoon changes in China and the summer precipitation changes in Japan. Comparison of diatom concentration records with records of paleoprecipitation indices, such as pollen, C/N ratio, and lignin from Lake Biwa sediments indicates that higher diatom concentrations represent wetter climatic conditions, and that lower concentrations represent drier climatic conditions. Meanwhile, comparison of recent monitoring data for diatom production with meteorological data shows that there is a good relationship between annual diatom production and values of annual summer precipitation during periods of May to October. Thus, records of diatom concentrations (also those of diatom valve flux) are of great utility as a proxy for inferring paleoprecipitation levels. Based on the diatom valve flux, summer precipitation levels in Lake Biwa watershed region are high during 132-115,102-101,31-29,7-0kacalBP, and low during 113-103,60-55,12kacalBP. These trends of the record show similar pattern to that of record of the East Asian summer monsoon intensity inferred from magnetic susceptibility from Chinese Loess Plateau. The result suggests that summer precipitation change in Japan is closely associated with the change in the East Asian summer monsoon intensity. However, there are several problems of age estimates for the Takashima-oki core. Each four ^<14>C dates at levels of 10-15m shows approximately 30kacalBP, therefore, sedimentation rates in this level are much higher than those at the other levels. The sedimentation rates do not match either the above mentioned conclusion that is based on ages of published tephrochronologies for the age/depth model, or those from other core closely drilled to the Takashima-oki core. Thus, this conclusion has remained suspensive.
内容記述タイプ Abstract
内容記述
内容記述 第14回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成13 (2001)年度)報告
内容記述タイプ Other
出版者
出版者 名古屋大学年代測定資料研究センター
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.18999/sumrua.13.61
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://ci.nii.ac.jp/naid/110000475711/
書誌情報 名古屋大学加速器質量分析計業績報告書

巻 13, p. 61-70, 発行日 2002-03
フォーマット
application/pdf
著者版フラグ
値 publisher
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