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モンゴル・フブスグル湖の湖底堆積物の化学組成データに認められる数千年スケールの周期的な環境変動
https://doi.org/10.18999/sumrua.20.93
https://doi.org/10.18999/sumrua.20.939041cc77-6129-4396-bd52-7e5610dd6380
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
murakami2008.pdf (19.0 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-04-28 | |||||
| タイトル | ||||||
| タイトル | モンゴル・フブスグル湖の湖底堆積物の化学組成データに認められる数千年スケールの周期的な環境変動 | |||||
| 言語 | ja | |||||
| その他のタイトル | ||||||
| その他のタイトル | Periodic variation of paleoenvironments found by PCA of 27 kyr geochemical records of Lake Hovsgol sediment. | |||||
| 言語 | en | |||||
| 著者 |
村上, 拓馬
× 村上, 拓馬× 勝田, 長貴× 山本, 鋼志× 高松, 信樹× 高野, 雅夫× 井上, 源喜× 尾田, 武文× 堀内, 一穂× 河合, 崇欣× Murakami, Takuma× Katsuta, Nagayoshi× Yamamoto, Koshi× Takamatsu, Nobuki× Takano, Masao× Matsumoto, Genki I× Oda, Takefumi× Horiuchi, Kazuho× Kawai, Takayoshi |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Geochemical proxy-records in a continuous 27 kyr (thousand years) core sediment from Lake Hovsgol in northwest Mongolia provides a detailed history of the response of the lake itself and the surrounding watershed to climate change during the last glacial to Holocene period. Principle component analysis (PCA) of 19 major and trace elements, total inorganic carbon (TIC), and total organic carbon (TOC) in the bulk-sediment samples revealed that the 21 chemical components are grouped by four assemblages: Group-1 components -Na, Mg, Ca, Sr, and TIC, hosted in carbonate minerals (calcite, dolomite, and magnecian calcite); Group-2 -Ni, Cu, and Zn, recognized as biophilic trace metals, and TOC; Group-3 -Al, K, Ti, V, Fe, Rb, Cs, Ba, and Pb, composed of rock-forming minerals; Group-4 -Cr, Mn, and As, sensitive to redox condition of sediment. The four element assemblages were originated from relevant 3 factors in subsidence. The group-1 and group-2 components of authigenic products in the lake are end member on the PC-1 score. The group-3 components of detrital materials from watershed contribute to the PC-2 score. The group-4 components of redox sensitive elements contribute to the PC-3 score, which are not the end member due to a small amount. The first two PC scores possibly suggest a sequential record of paleomoisture evolutions of central Asia. Especially, a variability of PC-2 score indicates erosion/weathering intensity of watershed which might be controlled by the ratio of vegetation cover associated with moisture change. A periodic variation on ~8. 7 kyr cycle was observed in the PC-2 score profile of detritus inputs of Lake Hovsgol over the last glacial and Holocene period. The decrease of detritus input of the lake coincided with the timing of dramatic supply of moisture from Asian monsoon regime and North At1antic region to Baikal watershed to which Lake Hovsgol belongs. Our geochemical records demonstrate that climate system of continental interior Asia was strongly influenced by climate change on a Milankovitch scale as well as a sub-Milankovitch one. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 第21回名古屋大学年代測定総合研究センターシンポジウム平成20(2008)年度報告 | |||||
| 言語 | ja | |||||
| 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 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/sumrua.20.93 | |||||
| ID登録タイプ | JaLC | |||||
| 書誌情報 |
ja : 名古屋大学加速器質量分析計業績報告書 巻 20, p. 93-102, 発行日 2009-03 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
