History of atmospheric lead deposition since 12,370 14C yr BP from a peat bog, Jura Mountains, Switzerland

被引：619

作者：

Shotyk, W

Weiss, D

Appleby, PG

Cheburkin, AK

Frei, R

Gloor, M

Kramers, JD

Reese, S

Van der Knaap, WO

机构：

[1] Univ Bern, Inst Geol, CH-3012 Bern, Switzerland

[2] Univ Liverpool, Dept Math Sci, Environm Radiometr Res Ctr, Liverpool L69 3BX, Merseyside, England

[3] Ukrainian Acad Sci, Inst Geol, UA-252054 Kiev 54, Ukraine

[4] Univ Copenhagen, Inst Geol, DK-1350 Copenhagen M, Denmark

[5] Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland

[6] Univ Bern, Inst Phys, Radiocarbon Lab, CH-3012 Bern, Switzerland

[7] Univ Bern, Inst Geobot, CH-3013 Bern, Switzerland

来源：

SCIENCE | 1998年 / 281卷 / 5383期

关键词：

D O I：

10.1126/science.281.5383.1635

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A continuous record of atmospheric Lead since 12,370 carbon-14 years before the present (C-14 yr BP) is preserved in a Swiss peat bog. Enhanced fluxes caused by climate changes reached their maxima 10,590 C-14: y, BP (Younger Dryas) and 8230 C-14 yr BP. Soil erosion caused by forest clearing and agricultural tillage increased Lead deposition after 5320 C-14 yr BP. Increasing lead/scandium and decreasing Lead-206/lead-207 beginning 3000 C-14 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 C-14 yr BP).

引用

页码：1635 / 1640

页数：6

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