Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 488113
Title Out of the dark - inverse modelling to make sense of luminescence properties of soils
Author(s) Temme, A.J.A.M.; Langston, A.; Reimann, T.; Vanwalleghem, T.; Roman Sanchez, A.
Event EGU General Assembly 2015, Vienna, 2015-04-12/2015-04-17
Department(s) Soil Geography and Landscape
PE&RC
Publication type Contribution in proceedings
Publication year 2015
Abstract Novel single-grain luminescence measurements of quartz and feldspar grains offer exciting ways forward to characterize rates and mechanisms of soil bioturbation. However, to fulfil this potential, the attribution problem must be solved – we must know which bioturbation mechanisms can lead to the observed outcome. Inverse modelling is a well-known solution for such problems. We present a new stochastic model of the evolution of grain properties such as apparent age and intrinsic brightness of quartz and feldspar grains in a bioturbated soil column. The model can rapidly simulate the depth profiles of these grain properties due to various bioturbation mechanisms over long periods of time. These can then be compared with the observed profiles.We illustrate the inverse model process for a case study site near Cordoba in Spain, where apparent ages and intrinsic brightness were determined for single quartz grains and single feldspar grains (with a 50 degree and a 175 degree protocol). Results indicate that several hypothesized bioturbation mechanisms can indeed be excluded by inverse modelling. The model can easily be extended to include hillslope processes.
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