ERA

Download the full-sized PDF of Global atmospheric As and Bi contamination preserved in 3000 year old arctic iceDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3FJ29C57

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Renewable Resources, Department of

Collections

This file is in the following collections:

Journal Articles (Renewable Resources)

Global atmospheric As and Bi contamination preserved in 3000 year old arctic ice Open Access

Descriptions

Author or creator
Krachler, M.
Zheng, J.
Fisher, D.
Shotyk, W.
Additional contributors
Subject/Keyword
Heavy-metals
C-14 YR BP
Trace-elements
Peat bog
Lead deposition
Jura Mountains
Samples
Climatic cycles
Core
Greenland
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Abstract: Despite its growing environmental significance, there are no detailed historical records of atmospheric As deposition for the Northern Hemisphere. Having overcome the severe analytical challenges in measuring As in polar ice, and using an Arctic ice core representing similar to 16 ka of snow accumulation, we present a complete record of atmospheric As deposition for this period which reveals significant contamination beginning 3000 years ago. While Pb enrichments unequivocally increased threefold above natural background levels during Greek/Phoenician, Roman, and Medieval periods, As is elevated by a factor of 5. Previous studies showed that these periods are not only enriched in Pb but also Sb: here we show significant contamination not only by As but also Bi, Cu, and Zn. The Pb isotope data reveal declines in the ratio (206)Pb/(207)Pb which reflects the introduction Pb-bearing aerosols from smelting of lead ores, but the metallurgy of copper ores must also have played a role. Taken together, these findings demonstrate a deeper, broader environmental significance of sulphide ore processing in antiquity, defining the origins of global atmospheric contamination for a suite of related elements and providing a new perspective on the start of the Anthropocene. In addition, the data indicate that by far the greatest As concentrations in the ice core are recorded during the Younger Dryas cold climate event centered around 12 ka B. P., demonstrating the strong link between global climate change and the atmospheric cycling of trace elements.
Date created
2009
DOI
doi:10.7939/R3FJ29C57
License information
Rights
© 2009 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Krachler, M., Zheng, J, Fisher, D., and Shotyk, W. (2009) Global atmospheric As and Bi contamination preserved in 3000 year old arctic ice. Global Biogeochemical Cycles 23(3), GB3011, doi:10.1029/2009GB003471.
Source
Link to related item

File Details

Date Uploaded
Date Modified
2014-05-01T03:56:54.889+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 286100
Last modified: 2015:10:12 13:31:49-06:00
Filename: GBC_23_2009_GB3011.pdf
Original checksum: 4bd4e2daa5806be1df6ad78e3588e0fd
Well formed: true
Valid: true
File title: Global atmospheric As and Bi contamination preserved in 3000 year old Arctic ice
File author: Michael Krachler, Jiancheng Zheng, David Fisher, William Shotyk
Page count: 7
Activity of users you follow
User Activity Date