History of Atmospheric Lead Deposition Since 12,370 14 C yr BP from a Peat Bog, Jura Mountains, Switzerland-Reference-Cited by-同舟云学术

History of Atmospheric Lead Deposition Since 12,370 14 C yr BP from a Peat Bog, Jura Mountains, Switzerland

Published:1998-09-11 Issue:5383 Volume:281 Page:1635-1640
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Shotyk W.¹,Weiss D.¹,Appleby P. G.¹,Cheburkin A. K.¹,Frei R.¹,Gloor M.¹,Kramers J. D.¹,Reese S.¹,Van Der Knaap W. O.¹

Affiliation:

1. W. Shotyk and D. Weiss are at the Geological Institute, University of Berne, Baltzerstrasse 1, CH-3012 Berne, Switzerland. P. G. Appleby is in the Environmental Radiometric Research Centre, Department of Mathematical Sciences, University of Liverpool, Post Office Box 147, Liverpool, L69 3BX, UK. A. K. Cheburkin is at the Geological Institute, Ukrainian Academy of Sciences, Gonhkar Street 55b, Kiev 54, 252054, Ukraine. R. Frei is at the Geologisk Institut, Kobenhavns Universitet, Oster Voldgade 10,...

Abstract

A continuous record of atmospheric lead since 12,370 carbon-14 years before the present ( 14 C yr BP) is preserved in a Swiss peat bog. Enhanced fluxes caused by climate changes reached their maxima 10,590 14 C yr BP (Younger Dryas) and 8230 14 C yr BP. Soil erosion caused by forest clearing and agricultural tillage increased lead deposition after 5320 14 C yr BP. Increasing lead/scandium and decreasing lead-206/lead-207 beginning 3000 14 C yr BP indicate the beginning of lead pollution from mining and smelting, and anthropogenic sources have dominated lead emissions ever since. The greatest lead flux (15.7 milligrams per square meter per year in A.D. 1979) was 1570 times the natural, background value (0.01 milligram per square meter per year from 8030 to 5320 14 C yr BP).

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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