Journal ArticleDOI
The control mechanisms of erosion and weathering at basin scale from cosmogenic nuclides in river sediment
TLDR
In this paper, the authors used in-situ produced cosmogenic nuclides (e.g. 10Be, 26Al), mostly in quartz from alluvial sediment.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2005-09-15. It has received 605 citations till now. The article focuses on the topics: Denudation & River terraces.read more
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A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements
TL;DR: In this paper, the authors present a single complete and straightforward method that reflects currently accepted practices and is consistent with existing production rate calibration measurements, which is intended to enable geoscientists, who wish to use cosmogenic-nuclide exposure age or erosion rate measurements in their work, to calculate exposure ages and erosion rates; compare previously published exposure ages on a common basis; and evaluate the sensitivity of their results to differences between published production rate scaling schemes.
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Crossing Disciplines and Scales to Understand the Critical Zone
TL;DR: The Critical Zone (CZ) as mentioned in this paper is a system of coupled chemical, biological, physical, and geological processes operating together to support life at the Earth's surface, and further advance requires scientists to cross disciplines and scales to integrate understanding of processes in the CZ, ranging in scale from the mineral water interface to the globe.
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Understanding Earth’s eroding surface with 10Be
Eric W. Portenga,Paul R. Bierman +1 more
TL;DR: In this article, the authors compile, normalize, and compare published 10Be erosion rate data (n = 1599) in order to understand how, on a global scale, geologic erosion rates integrated over 103 to 106 years vary between climate zones, tectonic settings, and different rock types.
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Radiocarbon and Soil Carbon Dynamics
TL;DR: In this article, a review explores the application of this underutilized tool, with an emphasis on conceptual advances made using the state-factor approach and on detecting processes causing abrupt change in soil C stores.
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Beyond threshold hillslopes: Channel adjustment to base-level fall in tectonically active mountain ranges
TL;DR: In this paper, the authors used concentrations of 10 2 -10 5 -a quartz extracted from river sand on the eastern margin of the Tibetan Plateau to explore relationships among short-term erosion rate, hillslope gradient, and channel steepness.
References
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Cosmic ray labeling of erosion surfaces: in situ nuclide production rates and erosion models
TL;DR: In this paper, the authors present theoretical estimates of the production rates of isotopes of He, Ne and Ar based on available cross-section data, and discuss the implications of these parameters for single and multiple nuclide studies in terms of the erosion models considered.
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Air pressure and cosmogenic isotope production
TL;DR: In this article, it was shown that the cosmic ray flux increases at higher altitude as air pressure and the shielding effect of the atmosphere decrease, and that altitude-dependent scaling factors are required to compensate for this effect in calculating cosmic ray exposure ages.
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Terrestrial in situ cosmogenic nuclides: theory and application
John C. Gosse,Fred M. Phillips +1 more
TL;DR: In this paper, the authors present the theory necessary for interpreting cosmogenic nuclide data, reviews estimates of parameters, describes strategies and practical considerations in field applications, and assesses sources of error in interpreting Cosmogenic Nuclide measurements.
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Increased sedimentation rates and grain sizes 2-4 Myr ago due to the influence of climate change on erosion rates.
TL;DR: It is suggested that climate affected erosion mainly by the transition from a period of climate stability, in which landscapes had attained equilibrium configurations, to a time of frequent and abrupt changes in temperature, precipitation and vegetation, which prevented fluvial and glacial systems from establishing equilibrium states.
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Topographic controls on erosion rates in tectonically active mountain ranges
TL;DR: The functional relationship between erosion rate and topography is central to understanding both controls on global sediment flux and the potential for feedback between tectonics, climate, and erosion in shaping topography.