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

IF 4.8 1区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Earth and Planetary Science Letters Pub Date : 1998-08-01 DOI:10.1016/S0012-821X(98)00098-3

K.J.R Rosman , W Chisholm , C.F Boutron , J.-P Candelone , J.-L Jaffrezo , C.I Davidson

引用次数: 40

Abstract

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 ²⁰⁶Pb/²⁰⁷Pb ratios were ∼1.15 from spring to mid-summer snow, and increased in late summer to early autumn, reaching ∼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.

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格陵兰岛Dye 3地区雪中铅来源的季节变化

在格陵兰岛南部的Dye 3收集的新鲜和略微老化的雪中，在整整一年中测量了铅的同位素组成和浓度。铅浓度变化幅度较大，春季4月为14 ~ 3016 pg/g，夏季9月为3 ~ 6 pg/g，同位素比值变化规律明显。206Pb/207Pb比值在春季至仲夏雪期间为~ 1.15，在夏末至初秋期间增加，冬季达到~ 1.20。这些同位素数据表明，秋季至冬季降雪的铅来自北美，而春季至仲夏降雪的铅来自欧亚大陆。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earth and Planetary Science Letters 地学-地球化学与地球物理

CiteScore

10.30

自引率

5.70%

发文量

475

审稿时长

2.8 months

期刊介绍： Earth and Planetary Science Letters (EPSL) is a leading journal for researchers across the entire Earth and planetary sciences community. It publishes concise, exciting, high-impact articles ("Letters") of broad interest. Its focus is on physical and chemical processes, the evolution and general properties of the Earth and planets - from their deep interiors to their atmospheres. EPSL also includes a Frontiers section, featuring invited high-profile synthesis articles by leading experts on timely topics to bring cutting-edge research to the wider community.