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
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Alkalinity and dissolved inorganic carbon exports from tropical and subtropical river catchments discharging to the Great Barrier Reef, Australia
TL;DR: In this paper, the authors measured dissolved inorganic carbon (DIC) and total alkalinity (TAlk) concentrations from four tropical rivers of the Great Barrier Reef region in Australia with daily river discharge to quantify annual river loads and export rates.
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Detrital record of the denudation of volcanic islands under sub-tropical climate (Cape Verde)
TL;DR: In this paper, the authors focused on the composition of the sediments produced in volcanic islands when the climate does not favour weathering, and the main factor responsible for the variability in sediment composition is the incorporation of biogenic material derived from the evolving shelves; it largely exceeds the effects of the exhumation of different volcanic and basement units.
Journal ArticleDOI
Modelling the riverine δ7Li variability throughout the Amazon Basin
TL;DR: In this article, a numerical model is developed to simulate two major processes that have been proposed as key controls of the river lithium isotopic composition: weathering reactions inside the regolith, accounting for secondary phase formation, and interactions between riverine water and secondary phases in floodplain.
Journal ArticleDOI
The microbial habitability of weathered volcanic glass inferred from continuous sensing techniques.
Elizabeth Bagshaw,Charles S. Cockell,Naresh Magan,Jemma L. Wadham,T. Venugopalan,Tong Sun,Matthew C. Mowlem,Anthony J. Croxford +7 more
TL;DR: The experiments showed that microbial communities at the site studied here could potentially be active for 39% of the year, if the depth of the community within the outcrop maintains a balance between access to liquid water and adequate protection from freezing.
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Modeling the Nd isotopic composition in the North Atlantic basin using an eddy-permitting model
Thomas Arsouze,Anne-Marie Tréguier,Simon Peronne,Simon Peronne,Jean-Claude Dutay,François Lacan,Catherine Jeandel +6 more
TL;DR: In this article, a regional eddy-permitting resolution Ocean General Circu- lation Model (1/4 ) of the North Atlantic basin is used to simulate the distribution of the Nd isotopic composition, consider- ing BE as the only source.
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.