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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >A synthesis of lead isotopes in two millennia of European air
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A synthesis of lead isotopes in two millennia of European air

机译：在两千年的欧洲空气中合成铅同位素

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摘要

Four airborne particular records from ombrotrophic peat bogs in southern Norway, extending back 300 years, have been measured for chronology, lead concentration, and lead isotope composition. Since southern Norway receives an airborne lead signal that accumulates emissions from the European continent, the trend in the four bog records can be used to correlate previously reported measurements from France, Switzerland, England, and Greenland that cover different ranges of time. When these are compiled, the integrated European record that emerges spans the last 2300 years of human influence on lead in the air over Europe and suggests human control of lead in airborne particulates over the entire period. From 366 BC through the first half of the 20th century, lead isotopic compositions in European air have fallen within the range of compositions in European ore bodies. Since 1950, isotopic compositions have been beyond the range in those ore body compositions and have fallen within the array of lead isotope compositions typical of gasoline from western industrial nations (a mixing line between US and Australian lead in gasoline). The overlap between the European record and the range in modern European air suggests an average isotopic composition of ~(206)Pb/~(207)Pb ca. 1.13 and of ~(208)Pb/~(207)Pb ca. 2.41 in air over Europe during the last 20 years.
机译：挪威南部的营养缺陷性泥炭沼泽的四个空中传播的特殊记录可以追溯到300年前，它们的年代，铅浓度和铅同位素组成均得到了测量。由于挪威南部收到的机载铅信号会累积来自欧洲大陆的排放物，因此四个沼泽记录的趋势可用于关联法国，瑞士，英国和格陵兰岛先前报道的涵盖不同时间范围的测量值。汇总这些数据后，出现的欧洲综合记录跨越了过去2300年人类对欧洲空气中铅的影响，并建议人们在整个时期内控制空气中微粒中的铅。从公元前366年到20世纪上半叶，欧洲空气中的铅同位素组成已落在欧洲矿体的组成范围内。自1950年以来，同位素组成已经超出了这些矿体组成的范围，并落入了西方工业国家的典型汽油（美国和澳大利亚的汽油中的铅之间的混合线）的铅同位素组成的范围内。欧洲记录与现代欧洲大气范围的重叠表明，平均同位素组成约为（206）Pb /〜（207）Pbca。约（208）Pb /〜（207）Pb的1.13和在过去的20年中，欧洲境内的飞行高度为2.41。

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