{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360004229805051776.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2015jg002932"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JG002932"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JG002932"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Chemical weathering and long‐term CO<sub>2</sub> consumption in the Ayeyarwady and Mekong river basins in the Himalayas"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>The role of terrestrial river systems in the global carbon cycle on a long timescale has been a subject of interest, especially in the context of past climate changes such as the global cooling in the Cenozoic. The discharges of water and carbon into the ocean from the Himalayan watersheds are among the highest in the world. However, there are few reliable geochemical data from the Ayeyarwady River. This study focused on reevaluating chemical weathering in the Himalayan watersheds based on samples taken from the Ayeyarwady, Mekong, and Chao Phraya Rivers and on chemical analysis of the composition of dissolved substances in these rivers. Comparisons of water quality showed that, unlike in previous studies, the total alkalinity budgets of the Ayeyarwady are dominated by carbonate rather than silicate weathering. Long‐term CO<jats:sub>2</jats:sub> consumption by silicate weathering in the Ayeyarwady is estimated to be only 63–145 × 10<jats:sup>9</jats:sup> mol yr<jats:sup>−1</jats:sup>, which is only 10% of the previous estimate. Our results also suggest that the total Himalayan watersheds account for only about 10% of the total global CO<jats:sub>2</jats:sub> consumption by silicate weathering. Although we need further studies, chemical weathering and associated CO<jats:sub>2</jats:sub> uptake in the Himalayas likely played a lesser role in long‐term global cooling in the past than previously appreciated.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004229805051923","@type":"Researcher","foaf:name":[{"@value":"Takuya Manaka"}],"jpcoar:affiliationName":[{"@value":"Atmosphere and Ocean Research Institute University of Tokyo  Chiba Japan"},{"@value":"Department of Earth and Planetary Science, Graduate School of Science University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805051919","@type":"Researcher","foaf:name":[{"@value":"Souya Otani"}],"jpcoar:affiliationName":[{"@value":"Atmosphere and Ocean Research Institute University of Tokyo  Chiba Japan"},{"@value":"Department of Earth and Planetary Science, Graduate School of Science University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805052042","@type":"Researcher","foaf:name":[{"@value":"Akihiko Inamura"}],"jpcoar:affiliationName":[{"@value":"Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST)  Ibaraki Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805052041","@type":"Researcher","foaf:name":[{"@value":"Atsushi Suzuki"}],"jpcoar:affiliationName":[{"@value":"Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST)  Ibaraki Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805051912","@type":"Researcher","foaf:name":[{"@value":"Thura Aung"}],"jpcoar:affiliationName":[{"@value":"Myanmar Earthquake Committee, Myanmar Engineering Society  Yangon Myanmar"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805051913","@type":"Researcher","foaf:name":[{"@value":"Raywadee Roachanakanan"}],"jpcoar:affiliationName":[{"@value":"Faculty of Environment and Resource Studies Mahidol University  Nakhon Pathom Thailand"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805051911","@type":"Researcher","foaf:name":[{"@value":"Takeshige Ishiwa"}],"jpcoar:affiliationName":[{"@value":"Atmosphere and Ocean Research Institute University of Tokyo  Chiba Japan"},{"@value":"Department of Earth and Planetary Science, Graduate School of Science University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229805051920","@type":"Researcher","foaf:name":[{"@value":"Hodaka Kawahata"}],"jpcoar:affiliationName":[{"@value":"Atmosphere and Ocean Research Institute University of Tokyo  Chiba Japan"},{"@value":"Department of Earth and Planetary Science, Graduate School of Science University of Tokyo  Tokyo Japan"},{"@value":"Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST)  Ibaraki Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21698953"},{"@type":"EISSN","@value":"21698961"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Biogeosciences"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2015-06","prism:volume":"120","prism:number":"6","prism:startingPage":"1165","prism:endingPage":"1175"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JG002932"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JG002932"}],"createdAt":"2015-06-02","modifiedAt":"2023-10-05","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781798058624","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"14J10963"},{"@type":"JGN","@value":"JP14J10963"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14J10963/"}],"notation":[{"@language":"ja","@value":"バングラデシュ河川水のマグネシウム・ケイ素同位体比から探る岩石風化と炭素循環"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002215361211776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Spatial and Seasonal Variation in Surface Water pCO2 in the Ganges, Brahmaputra, and Meghna Rivers on the Indian Subcontinent"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011144298880640","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Geochemical evidence supporting T. 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