格陵兰岛Dye 3地区雪中铅来源的季节变化

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

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引用次数: 40

摘要

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。

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

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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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.