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Articles by Aaron Bufe
Rock weathering’s tangled role in Earth’s carbon cycle
The relationship between rock weathering and the global carbon cycle is complex. This complexity calls for research across spatial, temporal, and disciplinary boundaries and suggests that the emerging practice of issuing carbon credits for enhanced weathering is premature.
Rock weathering can counteract river CO2 emissions induced by permafrost thaw
Author: Liwei Zhang (张力伟), Aaron Bufe, Joshua F. Dean, Gerard Rocher-Ros, Ryan A. Sponseller, Emily H. Stanley, Jan Karlsson, David E. Butman, Ran Liu (刘然), Lijun Hou Jinzhi Ding (丁金枝), Shilong Piao (朴世龙), Xinghui Xia (夏星辉) & Tom J. Battin
Rock weathering can counteract river CO 2 emissions induced by permafrost thaw
Abstract Climate-induced permafrost thaw unlocks large stores of organic carbon that are mineralized and emitted as carbon dioxide (CO2) from rivers to the atmosphere1. Concurrently, warming and permafrost thaw can increase mineral weathering rates, thus affecting the release and sequestration of inorganic carbon2,3,4. Yet how these biological and geological carbon cycles interact and jointly affect CO2 dynamics (emission compared with drawdown) in permafrost rivers remains unknown5.
Deep CO2 release and the carbon budget of the central Apennines modulated by geodynamics - Nature Geoscience
Abstract Recent studies increasingly recognize the importance of critical-zone weathering during mountain building for long-term CO2 drawdown and release. However, the focus on near-surface weathering reactions commonly does not account for CO2 emissions from the crust, which could outstrip CO2 drawdown where carbonates melt and decarbonize during subduction and metamorphism.
Author Correction: Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion - Nature Geoscience
Correction to: Nature Geoscience https://doi.org/10.1038/s41561-021-00714-3, published online 7 April 2021. In the version of the article initially published, a factor of 0.5 was accidentally dropped from equation (21), which has now been corrected to \({[{\mathrm{CO}}_{2}]}_{\mathrm{mt}}=0.5\left({[{\mathrm{SO}}_{4}^{2-}]}^{\mathrm{eq}}-{\left[{\mathrm{Cat}}\right]}_{\mathrm{sil}}^{\mathrm{eq}}\right)\).
CO2 drawdown from weathering is maximized at moderate erosion rates
Research Article GEOLOGY Aaron Bufe https://orcid.org/0000-0002-8551-7265 a.bufe@lmu.de, Jeremy K. C. Rugenstein https://orcid.org/0000-0003-4123-3305, and Niels Hovius https://orcid.org/0000-0002-9158-9871Authors Info & Affiliations Science 7 Mar 2024 Vol 383, Issue 6687 pp. 1075-1080 Editor’s summary The role of erosion in the modulation of atmospheric carbon dioxide has been challenging to untangle because increased weathering fluxes do not always result in the drawdown of this greenhouse gas.
Escalating Carbon Export from High-Elevation Rivers in a Warming Climate
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Patterns of incision and deformation on the southern flank of the Yellowstone hotspot from terraces and topography
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Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion
Abstract Global climate is thought to be modulated by the supply of minerals to Earth’s surface. Whereas silicate weathering removes carbon dioxide (CO2) from the atmosphere, weathering of accessory carbonate and sulfide minerals is a geologically relevant source of CO2. Although these weathering pathways commonly operate side by side, we lack quantitative constraints on their co-variation across erosion rate gradients.
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