Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks

Abstract The chemical composition of the Gaoping River in Taiwan reflects the weathering of both silicate and carbonate rocks found in its metasedimentary catchment. Major dissolved ion chemistry and radiocarbon signatures of dissolved inorganic carbon (DIC) reveal the importance of pyrite-derived s...

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Autores principales:	T. M. Blattmann, S.-L. Wang, M. Lupker, L. Märki, N. Haghipour, L. Wacker, L.-H. Chung, S. M. Bernasconi, M. Plötze, T. I. Eglinton
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4ee14f8f157847e5b6d1406c819a76ec
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spelling	oai:doaj.org-article:4ee14f8f157847e5b6d1406c819a76ec2021-12-02T15:07:53ZSulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks10.1038/s41598-019-39272-52045-2322https://doaj.org/article/4ee14f8f157847e5b6d1406c819a76ec2019-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-39272-5https://doaj.org/toc/2045-2322Abstract The chemical composition of the Gaoping River in Taiwan reflects the weathering of both silicate and carbonate rocks found in its metasedimentary catchment. Major dissolved ion chemistry and radiocarbon signatures of dissolved inorganic carbon (DIC) reveal the importance of pyrite-derived sulphuric acid weathering on silicates and carbonates. Two-thirds of the dissolved load of the Gaoping River derives from sulphuric acid-mediated weathering of rocks within its catchment. This is reflected in the lowest reported signatures DI14C for a small mountainous river (43 to 71 percent modern carbon), with rock-derived carbonate constituting a 14C-free DIC source. Using an inverse modelling approach integrating riverine major dissolved ion chemistry and DI14C, we provide quantitative constraints of mineral weathering pathways and calculate atmospheric CO2 fluxes resulting from the erosion of the Taiwan orogeny over geological timescales. The results reveal that weathering on Taiwan releases 0.31 ± 0.12 MtC/yr, which is offset by burial of terrestrial biospheric organic carbon in offshore sediments. The latter tips the balance with respect to the total CO2 budget of Taiwan such that the overall system acts as a net sink, with 0.24 ± 0.13 MtC/yr of atmospheric CO2 consumed over geological timescales.T. M. BlattmannS.-L. WangM. LupkerL. MärkiN. HaghipourL. WackerL.-H. ChungS. M. BernasconiM. PlötzeT. I. EglintonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. M. Blattmann S.-L. Wang M. Lupker L. Märki N. Haghipour L. Wacker L.-H. Chung S. M. Bernasconi M. Plötze T. I. Eglinton Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
description	Abstract The chemical composition of the Gaoping River in Taiwan reflects the weathering of both silicate and carbonate rocks found in its metasedimentary catchment. Major dissolved ion chemistry and radiocarbon signatures of dissolved inorganic carbon (DIC) reveal the importance of pyrite-derived sulphuric acid weathering on silicates and carbonates. Two-thirds of the dissolved load of the Gaoping River derives from sulphuric acid-mediated weathering of rocks within its catchment. This is reflected in the lowest reported signatures DI14C for a small mountainous river (43 to 71 percent modern carbon), with rock-derived carbonate constituting a 14C-free DIC source. Using an inverse modelling approach integrating riverine major dissolved ion chemistry and DI14C, we provide quantitative constraints of mineral weathering pathways and calculate atmospheric CO2 fluxes resulting from the erosion of the Taiwan orogeny over geological timescales. The results reveal that weathering on Taiwan releases 0.31 ± 0.12 MtC/yr, which is offset by burial of terrestrial biospheric organic carbon in offshore sediments. The latter tips the balance with respect to the total CO2 budget of Taiwan such that the overall system acts as a net sink, with 0.24 ± 0.13 MtC/yr of atmospheric CO2 consumed over geological timescales.
format	article
author	T. M. Blattmann S.-L. Wang M. Lupker L. Märki N. Haghipour L. Wacker L.-H. Chung S. M. Bernasconi M. Plötze T. I. Eglinton
author_facet	T. M. Blattmann S.-L. Wang M. Lupker L. Märki N. Haghipour L. Wacker L.-H. Chung S. M. Bernasconi M. Plötze T. I. Eglinton
author_sort	T. M. Blattmann
title	Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
title_short	Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
title_full	Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
title_fullStr	Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
title_full_unstemmed	Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks
title_sort	sulphuric acid-mediated weathering on taiwan buffers geological atmospheric carbon sinks
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/4ee14f8f157847e5b6d1406c819a76ec
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Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks

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