Using short-lived nuclides of the U- and Th-series to probe the kinetics of colloid migration in forested soils

Rihs, Sophie; Prunier, Jonathan; Thien, Bruno; Lemarchand, Damien; Pierret, Marie‐Claire; Chabaux, François

doi:10.1016/j.gca.2011.09.045

Cited by 34 publications

(23 citation statements)

References 95 publications

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“…The Strengbach watershed (80 ha) is a small granitic catchment located on the eastern side of the Vosges Mountains (Northeast France) where hydro-geochemical processes have been monitored since 1986 (Riotte and Chabaux 1999;Chabaux et al 2005;Rihs et al 2011;Gangloff et al 2014;Pierret et al 2014). The topography ranges from 883 m at the outlet to 1146 m at the catchment divide (Fig.…”

Section: Study Site Descriptionmentioning

confidence: 99%

Hydrological and vegetation response to climate change in a forested mountainous catchment

Beaulieu

Lucas

Viville

et al. 2016

Model. Earth Syst. Environ.

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Vegetal cover and the water cycle are closely linked. The climate controls the distribution and productivity of terrestrial vegetation, and the vegetal cover type is a key determinant for evapotranspiration and global runoff. In this study, a dynamic vegetation model (LPJ) has been coupled with a 3D hydrogeological model (MODFLOW) to estimate, for the first time, the impact of climate change on a small forested temperate watershed (Strengbach, Vosges, France). The model, calibrated with monthly hydrological and climate data, is able to globally reproduce the observed vegetal cover distribution and the water cycle over the 1987-2009 period. The discrepancies between calculated and observed intra-annual discharge variations highlight the importance of processes such as snow formation, snowmelt, and catchment recharge after drought periods, as well as the impact of evapotranspiration. Longterm simulations extending up to the year 2100 have been performed with climatic output from the Meteo-France climate model ARPEGE/Climate (IPCC, 2007 scenario A1B). With a predicted increase in temperature of 2.6°C and a rise in atmospheric CO 2 concentration of 80%, the mean annual precipitation decreases by 4.5% in the Strengbach watershed over the course of the century. The models cascade predicts a limited decrease of evapotranspiration (by 2.5%), an impact on discharge (11% decrease) at the watershed outlet over the 21st century, and a significant change in vegetation distribution starting in approximately 2085. The response of land plants to climate change in the future seems to only slightly affect the water resources in the Strengbach catchment. This study also highlights existing shortcomings and limitations of simulations for measuring the impacts of climate change.

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Section: Study Site Descriptionmentioning

confidence: 99%

Hydrological and vegetation response to climate change in a forested mountainous catchment

Beaulieu

Lucas

Viville

et al. 2016

Model. Earth Syst. Environ.

Self Cite

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“…To reduce its volume before analysis, the litter sample was ashed in a furnace at 450°C for 24 h, ensuring an 85 % Ra recovery yield (Rihs et al 2011).…”

Section: Litter Calcination Selective Extraction and Chemical Purifmentioning

confidence: 99%

“…An Ortec-Ametek gamma spectrometer with a high-efficiency well-type germanium detector was used for the measurement of ( 228 Ra) activities (Rihs et al, 2011).…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…6c,d). Although part of the unsupported Ra observed in the layer might be due to an input from litterfall degradation, as in the case of Si and K, a mass balance calculation using Rihs' et al (2011) approach demonstrates that the litter-derived 228 Ra flux cannot account for the total amount of unsupported 228 Ra (calculation reported in the electronic annex S3).…”

Section: 2mentioning

confidence: 99%

“…The latter method, however, relies on the assumption of steady-state soil thickness, i.e., the soil production rate balances the denudation rate, which is difficult to evaluate. Alternatively, Uand Th-series nuclides were recently used to determine weathering rates in regoliths and soils over various time scales (Chabaux et al, 2003a(Chabaux et al, , 2003bDequincey et al, 1999Dequincey et al, , 2002Dosseto et al, 2008Dosseto et al, , 2012Keech et al, 2013;Ma et al, 2010Ma et al, , 2013Pelt et al, 2008;Richter et al, 2007;Rihs et al, 2011;Suresh et al, 2013, see also Chabaux et al (2008), or Vigier and Bourdon (2011) for recent reviews). The matching between the half-lives of Uand Th-series nuclides and the timescales of pedogenic and weathering processes makes these nuclides particularly suitable for inferring the time constants of element transfer within soil layers.…”

Section: Introductionmentioning

confidence: 99%

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