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
More filters
Journal ArticleDOI
Evolution of porosity and diffusivity associated with chemical weathering of a basalt clast
Alexis Navarre-Sitchler,Alexis Navarre-Sitchler,Carl I. Steefel,Carl I. Steefel,Li Yang,Li Yang,Liviu Tomutsa,Susan L. Brantley +7 more
TL;DR: In this article, the authors combine synchrotron X-ray microcomputed tomography (μCT) and laboratory and numerical diffusion experiments to examine changes in both total and effective porosity and effective diffusion coefficients across a weathering interface in a weathered basalt clast from Costa Rica.
Journal ArticleDOI
Equatorial convergence of India and early Cenozoic climate trends
Dennis V. Kent,Giovanni Muttoni +1 more
TL;DR: In this article, the authors argue that India's northward flight and collision with Asia was a major driver of global tectonics in the Cenozoic and, therefore, of atmospheric CO2 concentration (pCO2) and thus global climate.
Journal ArticleDOI
A major drop in seawater 87Sr/86Sr during the Middle Ordovician (Darriwilian): Links to volcanism and climate?
TL;DR: In this paper, the authors used a numerical model to explore the hypothesis that volcanic weathering provided the flux of nonradiogenic Sr to the oceans and found that a close balance between volcanic outgassing and CO 2 consumption from weathering produced steady p CO 2 levels and climate through the middle Katian consistent with recent Ordovician paleotemperature estimates.
Journal ArticleDOI
Chemical weathering of a marine terrace chronosequence, Santa Cruz, California I: Interpreting rates and controls based on soil concentration-depth profiles
Art F. White,Marjorie S. Schulz,Davison V. Vivit,Alex E. Blum,David A. Stonestrom,Suzanne P. Anderson +5 more
TL;DR: In this article, the spatial and temporal changes in element and mineral concentrations in regolith profiles in a chronosequence developed on marine terraces along coastal California are interpreted in terms of chemical weathering rates and processes.
Journal ArticleDOI
The Upper Valanginian (Early Cretaceous) positive carbon–isotope event recorded in terrestrial plants
Darren R. Gröcke,Gregory D. Price,Stuart A. Robinson,Evgenij Y. Baraboshkin,Jörg Mutterlose,Alastair Ruffell +5 more
TL;DR: In this article, the authors analyzed carbon-isotope ratios from fossil plant material through the Valanginian and Lower Hauterivian from a shallow-marine, ammonite-constrained succession in the Crimean Peninsula of the southern Ukraine in order to determine if the upper-valanginian positive carbon-Isotope excursion is expressed in the atmosphere.
References
More filters
Journal ArticleDOI
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.
Journal ArticleDOI
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
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.