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变的相关气候条件之间的关系。结果，新发明的地球化学指数成功地区分了北方、北方湿润、草原、温带湿润、干旱、半干旱和热带雨林气候下发育的土壤。该地球化学指数可应用于古土壤来评估过去的气候条件。对北海道和华北白垩系地层的应用表明，地球化学古风化W指数与古气候变化是一致的，验证了W指数可以作为新的古气候代理指标。

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

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.

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

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

New rigorous provenance discrimination diagrams restoring original source rock compositions by adjusting the effects of source area weathering and hydraulic sorting processes

新的严格的物源判别图通过调整源区风化和水力分选过程的影响来恢复原始烃源岩成分

• 发表时间: 2012
• 作者: Muto;J.;G.Hirth;R.;Heilbronner;J.Tullis;Ohta et. Al
• 通讯作者: Ohta et. Al