Seasonal variations in the origin of lead in snow at Dye 3, Greenland

被引：31

作者：

Rosman, KJR

Chisholm, W

Boutron, CF

Candelone, JP

Jaffrezo, JL

Davidson, CI

机构：

[1] Curtin Univ Technol, Dept Appl Phys, Perth, WA 6845, Australia

[2] CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France

[3] Univ Grenoble 1, Inst Univ France, UFR Mecan, F-38041 Grenoble, France

[4] Carnegie Mellon Univ, Dept Civil Engn, Pittsburgh, PA 15213 USA

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 1998年 / 160卷 / 3-4期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

lead; isotope ratios; Greenland; snow; seasonal variations;

D O I：

10.1016/S0012-821X(98)00098-3

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The isotopic composition and concentration of lead has been measured in fresh and slightly aged snow collected at Dye 3 in southern Greenland during one full year. The lead concentration displayed large variations ranging from 14-3016 pg/g in April (spring) to 3-6 pg/g in September (summer) while the isotopic ratios changed in regular manner during the year. The Pb-206/Pb-207 ratios were similar to 1.15 from spring to mid-summer snow, and increased in late summer to early autumn, reaching similar to 1.20 in winter. These isotopic data indicate that the lead in the autumn to winter snow originated in North America, while that in spring to mid-summer snow is from Eurasia. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：383 / 389

页数：7

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