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Comment on deconvolution profiles in sediment cores
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In this paper, heavy metals profiles in sediment cores are discussed in terms of their source profiles, using a simple approach where the mixing is considered as a diffusive process, and the results are compared with the deconvoluted profiles obtained by the Fourier transform technique of Christensen and Osuna (1989).Abstract:
Heavy metals profiles in sediment cores are discussed in terms of their source profiles, using a simple approach where the mixing is considered as a diffusive process. The results are compared with the deconvoluted profiles obtained by the Fourier transform technique of Christensen and Osuna (1989). Agreement is found for cases of negligible and fast mixing respectively. For intermediate mixing the physical conditions lead to a result different from that of Christensen and Osuna. This comparison highlights the value of combining the two approaches.read more
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Radioactivity measurements applied to glaciers and lake sediments
J.F. Pinglot,M. Pourchet +1 more
TL;DR: The behavior of glaciers, polar ice-caps and lakes can be studied by means of natural and artificial radioactivity measurements conducted on snow (Alps, Arctic and Antarctic) and sediments samples as mentioned in this paper.
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Do decreased trace metal concentrations in surficial skagerrak sediments over the last 15-30 years indicate decreased pollution?
TL;DR: In this article, mass accumulation rates (MAR) in g/m2/year were used to resolve the question of increased or decreased supply of Zn, Pb and Cu over the last 15-30 years (1963-1991).
References
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Journal ArticleDOI
Quantitative estimates of biological mixing rates in abyssal sediments
TL;DR: In this article, a time-dependent eddy diffusion model was proposed for biological mixing in deep-sea sediments, where mixing takes place to a depth L at constant eddy diffusivity D.
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Chernobyl 134Cs, 137Cs, and 210Pb in high mountain lake sediment: Measurements and modeling of mixing process
TL;DR: In this article, the authors measured the vertical distribution of /sup 134/Cs, /sup 137/Cs and /sup 210/Pb vertical distributions in a lake sediment core.
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Cesium 137 and lead 210 in alpine lake sediments: Measurements and modeling of mixing processes
TL;DR: In this article, simulations of 137C distribution in lake sediment cores are presented for slow and rapid mixing processes, for different mixing layers, and for different sampling thicknesses, and a parameter characterizing the profile distribution is introduced.
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Atmospheric fluxes of lead, zinc, and cadmium from frequency domain deconvolution of sedimentary records
TL;DR: In this paper, a frequency domain deconvolution method to extract past input fluxes of particle-associated pollutants from their sedimentary records is developed. The method is based on the assumption of a mixing layer below which no further mixing takes place.