Journal ArticleDOI
Basalt weathering laws and the impact of basalt weathering on the global carbon cycle
TLDR
In this paper, the chemical weathering of basalts and the flux of carbon transferred from the atmosphere to the ocean during this major process at the surface of the Earth were investigated.About:
This article is published in Chemical Geology.The article was published on 2003-12-30. It has received 762 citations till now. The article focuses on the topics: Soil production function & Weathering.read more
Citations
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Continental weathering following a Cryogenian glaciation: Evidence from calcium and magnesium isotopes
Simone A Kasemann,Philip A.E. Pogge von Strandmann,Anthony R. Prave,Anthony E. Fallick,Tim Elliott,Karl-Heinz Hoffmann +5 more
TL;DR: In this paper, a marked ocean acidification event and elevated atmospheric carbon dioxide concentrations following the extreme environmental conditions of the younger Cryogenian glaciation have been inferred from boron isotope measurements.
Journal ArticleDOI
Dissolved silica mobilization in the conterminous USA
Nils Jansen,Jens Hartmann,Ronny Lauerwald,Hans H. Dürr,Stephan Kempe,S. Loos,Hans Middelkoop +6 more
TL;DR: In this article, a continental-scale, process-oriented, empirical model for DSi mobilization is developed to assess the influence of regional variations of proposed factors on large scale DSI mobilization.
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Bicarbonate-fluxes and CO2-consumption by chemical weathering on the Japanese Archipelago - Application of a multi-lithological model framework
TL;DR: In this paper, the authors applied a new lithological map of Japan with an enhanced lithological classification, a hydrochemical data set representing 382 catchments (covering ∼44.4% of the Japanese Archipelago) and a multi-lithological model approach to predict bicarbonate-fluxes and CO 2 -consumption by chemical weathering.
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Trace element transport in western Siberian rivers across a permafrost gradient
Oleg S. Pokrovsky,Oleg S. Pokrovsky,R. M. Manasypov,Sergey V. Loiko,Ivan Krickov,Sergey G. Kopysov,L.G. Kolesnichenko,Sergey N. Vorobyev,Sergey N. Kirpotin +8 more
TL;DR: In this article, the authors studied trace element transport in permafrost-affected Earth surface environments, where they sampled 60 large and small Siberian rivers and found that the main factors controlling the shift of river feeding from surface and subsurface flow to deep underground flow were the depth of the active layer and its position in organic or mineral horizons of the soil profile.
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Experimental determination of the role of diffusion on Li isotope fractionation during basaltic glass weathering
TL;DR: In this paper, Li isotope fractionation during the dissolution of basalt and particularly during leaching of Li into solution by diffusion or ion exchange is assessed. But the authors focus on the diffusion process and do not consider the effects of ion exchange.
References
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Global silicate weathering and CO2 consumption rates deduced from the chemistry of large rivers
TL;DR: In this article, newly compiled data on the 60 largest rivers of the world are used to calculate the contribution of main lithologies, rain and atmosphere to river dissolved loads, and the relationship between the chemical weathering rates of silicates and the possible controlling parameters are explored.
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The carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years
TL;DR: In this article, a computer model has been constructed that considers the effects on the CO/sub 2/ level of the atmosphere, and the Ca, Mg, and HCO/sub 3/ levels of the ocean, of the following processes: weathering on the continents of calcite, dolomite, and calcium-and-magnesium-containing silicates; biogenic precipitation and removal of CaCO 3/from the ocean; removal of Mg from the ocean via volcanic-seawater reaction; and the metamorphic-magmatic decarbon
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Tectonic forcing of late Cenozoic climate
TL;DR: In particular, tectonically driven increases in chemical weathering may have resulted in a decrease of atmospheric C02 concentration over the past 40 Myr as discussed by the authors. But this was not shown to be the case for the uplift of the Tibetan plateau and positive feedbacks initiated by this event.
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Geocarb III: A Revised Model of Atmospheric CO2 over Phanerozoic Time
TL;DR: In this article, the GEOCARB model has been updated with an emphasis on factors affecting CO2 uptake by continental weathering, including the role of plants in chemical weathering and the application of GCMs to study the long-term carbon cycle.
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A negative feedback mechanism for the long‐term stabilization of Earth's surface temperature
TL;DR: In this article, it is suggested that the partial pressure of carbon dioxide in the atmosphere is buffered, over geological time scales, by a negative feedback mechanism, in which the rate of weathering of silicate minerals (followed by deposition of carbonate minerals) depends on surface temperature, which in turn depends on the carbon dioxide partial pressure through the greenhouse effect.