Quantatitative evaluation of chemical weathering effect and development of paleoclimate index

化学风化效应定量评价及古气候指数发展

• 批准号: 22740332
• 负责人: OHTA Tohru
• 金额: $ 2.58万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22740332/
• 关键词: 風化作用; 土壌組成; 古気候解析; 風化指標; 化学組成; 土壌; 古土壌; 気候判別; 古気候

The present study aims to unravel the relationship between geochemical changes during soil formation and relevant climatic conditions that induce geochemical modification. As a result, newly invented geochemical index successfully discriminated soils developed on boreal, boreal humid, steppe, temperate humid, arid, semi-arid and tropical rainforest climates. This eochemical index could be applied to paleosols to evaluate climatic condisions of the past. Applications to the Cretaceous strat in Hokkaido and Northern China revaled that geochemical paleoweathering W index are concordant with paleoclimatic changes, and verified that the W index would serve as a new paleoclimate proxy.

本研究旨在揭示土壤形成过程中的地球化学变化与引起地球化学改性的气候条件之间的关系。因此，新发明的地球化学指标成功地区分了北方，北方潮湿，草原，温带潮湿，干旱，半干旱和热带雨林气候的土壤。这一地球化学指标可用于古土壤评价过去的气候条件。通过对北海道和北方白垩纪地层的应用，证实了地球化学古风化作用W指数与古气候变化的一致性，证实了W指数可作为一种新的古气候指标。

项目成果

Reconstruction of terrestrial paleoenvironmental changes during the intervals of Oceanic Anoxic Events (OAEs) from the Jurassic?Cretaceous lacustrine deposits in Southeast Mongolia

蒙古东南部侏罗纪-白垩纪湖相沉积重建海洋缺氧事件期间陆地古环境变化

• 发表时间: 2010
• 作者: Yokoyama Y.;Webster J.M.;Cotterill C.;the Expedition 325 Scientists (Fuiita K.);Hasegawa et. Al
• 通讯作者: Hasegawa et. Al

Early Cretaceous terrestiral weathering in NE China: Relationship between paleocliamte change and the phased evolution of the Jehol Biota

中国东北早白垩世陆地风化：古气候变化与热河生物群阶段演化的关系

• 发表时间: 2011
• 作者: 蔵満康浩;坂和洋一;森田太智;森高外征雄;佐野孝好;高部英明;富田健太郎;内野喜一郎;松清修一;水田晃;大西直文;Ohta et. Al
• 通讯作者: Ohta et. Al

Identification of the unchanging reference component of compositional data from the properties of the coeffient of variation

从变异系数的性质识别成分数据的不变参考成分

• 发表时间: 2012
• 期刊: Mathematical Geosciences
• 影响因子: 2.6
• 作者: Ohta T.;Arai H. and Noda A
• 通讯作者: Arai H. and Noda A

Identification of the Unchanging Reference Component of Compositional Data from the Propperties of the Coefficient of Variation

从变异系数的性质识别成分数据不变的参考成分

• DOI: 10.1007/s11004-011-9332-y
• 发表时间: 2011
• 期刊: Mathematical Geosciences
• 影响因子: 2.6
• 作者: Ohta T.;Arai H.;Noda A.
• 通讯作者: Noda A.

モンゴル南東部のジュラ系-白亜系湖成頁岩層から復元する海洋無酸素事変期の陸域古環境

蒙古东南部侏罗纪-白垩系湖相页岩层重建海洋缺氧事件期间的陆地古环境

• 发表时间: 2011
• 作者: 安藤寿男;長谷川精;長谷川卓;太田亨;山本正伸;長谷部徳子;村田崇行;G.Li;N.Ichinnorov
• 通讯作者: N.Ichinnorov