globalchange  > 科学计划与规划
DOI: 10.1002/2016GL070952
论文题名:
Peat bogs in northern Alberta, Canada reveal decades of declining atmospheric Pb contamination
作者: Shotyk W.; Appleby P.G.; Bicalho B.; Davies L.; Froese D.; Grant-Weaver I.; Krachler M.; Magnan G.; Mullan-Boudreau G.; Noernberg T.; Pelletier R.; Shannon B.; van Bellen S.; Zaccone C.
刊名: Geophysical Research Letters
ISSN: 0094-8580
EISSN: 1944-8311
出版年: 2016
卷: 43, 期:18
起始页码: 9964
结束页码: 9974
语种: 英语
英文关键词: atmospheric lead ; environment ; northern Alberta ; unleaded peat bogs
Scopus关键词: Landforms ; Lead ; Meteorological problems ; Peat ; Alberta ; Anthropogenic emissions ; Atmospheric depositions ; Atmospheric lead ; Environment ; Fallout radionuclides ; Peat bogs ; Potentially toxic metals ; Wetlands
英文摘要: Peat cores were collected from six bogs in northern Alberta to reconstruct changes in the atmospheric deposition of Pb, a valuable tracer of human activities. In each profile, the maximum Pb enrichment is found well below the surface. Radiometric age dating using three independent approaches (14C measurements of plant macrofossils combined with the atmospheric bomb pulse curve, plus 210Pb confirmed using the fallout radionuclides 137Cs and 241Am) showed that Pb contamination has been in decline for decades. Today, the surface layers of these bogs are comparable in composition to the “cleanest” peat samples ever found in the Northern Hemisphere, from a Swiss bog ~ 6000 to 9000 years old. The lack of contemporary Pb contamination in the Alberta bogs is testimony to successful international efforts of the past decades to reduce anthropogenic emissions of this potentially toxic metal to the atmosphere. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990837118&doi=10.1002%2f2016GL070952&partnerID=40&md5=7af5cc68e616e1ca91a6b5cc5ce0b07f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9543
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada

Recommended Citation:
Shotyk W.,Appleby P.G.,Bicalho B.,et al. Peat bogs in northern Alberta, Canada reveal decades of declining atmospheric Pb contamination[J]. Geophysical Research Letters,2016-01-01,43(18).
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