Journal ArticleDOI
Competition between erosion and reaction kinetics in controlling silicate-weathering rates
Reads0
Chats0
TLDR
In this paper, the relative importance of denudation and reaction kinetics in moderating silicate-weathering fluxes in different erosional environments for different, commonly occurring silicate minerals was analyzed.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2010-04-15. It has received 131 citations till now. The article focuses on the topics: Denudation & Weathering.read more
Citations
More filters
Journal ArticleDOI
Hydrologic Regulation of Chemical Weathering and the Geologic Carbon Cycle
Kate Maher,C. P. Chamberlain +1 more
TL;DR: A model for silicate weathering is presented that regulates climatic and tectonic forcing through hydrologic processes and imposes a thermodynamic limit on weathering fluxes, based on the physical and chemical properties of river basins.
Journal ArticleDOI
Water balance creates a threshold in soil pH at the global scale
Eric W. Slessarev,Yang Lin,Nina L. Bingham,J. E. Johnson,J. E. Johnson,Yongjiu Dai,Joshua P. Schimel,Oliver A. Chadwick +7 more
TL;DR: It is shown that there is an abrupt transition from alkaline to acid soil pH that occurs at the point where mean annual precipitation begins to exceed mean annual potential evapotranspiration, and that climate creates a nonlinear pattern in soil solution chemistry at the global scale.
Journal ArticleDOI
Predominant floodplain over mountain weathering of Himalayan sediments (Ganga basin)
Maarten Lupker,Christian France-Lanord,Valier Galy,Jérôme Lavé,Jérôme Gaillardet,Ananta Prasad Gajurel,Caroline Guilmette,Mustafizur Rahman,Sunil K. Singh,Rajiv Sinha +9 more
TL;DR: In this paper, the authors present an extensive river sediment dataset covering the Ganga basin from the Himalayan front downstream to the ganga mainstream in Bangladesh and show that the Gangetic floodplain is the dominant location of silicate weathering for Na, K and [H2O + ].
Journal ArticleDOI
Controls on deep critical zone architecture: a historical review and four testable hypotheses
TL;DR: In this article, the authors highlight four new hypotheses about factors that drive deep critical zone weathering and thus influence the evolution of life-sustaining CZ architecture and synthesize the four hypotheses into an overarching conceptual model of fracturing and weathering that occurs as Earth materials are exhumed to the surface across subsurface gradients in stress, hydraulic head, temperature and chemical potential.
Journal ArticleDOI
Thickness of the chemical weathering zone and implications for erosional and climatic drivers of weathering and for carbon-cycle feedbacks
TL;DR: Inverse analysis of a parametric model presented by as mentioned in this paper provides first-order constraints on variability in the thickness of the zone of active weathering, and the effect of climate (temperature and runoff) on weathering fluxes is apparently weaker at low denudation rates than at high densification rates, such that erosion and potentially associated bedrock weathering may be important for maintaining climate-stabilizing feedbacks in Earth's carbon cycle.
References
More filters
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
Geochemistry of the Amazon: 2. The influence of geology and weathering environment on the dissolved load
TL;DR: In the Amazon Basin, substrate lithology and erosional regime (seen in terms of transport-limited and weathering-limited denudation) exert the most fundamental control on the chemistry of surface waters within a catchment.
Book
Kinetic theory in the earth sciences
TL;DR: Theory of Crystal Growth and Dissolution References Index as discussed by the authors is based on the rate laws of chemical reactions and transition state laws of Chemical Reactions (RLSR) of as discussed by the authors.