Unprecedented wind erosion and perturbation of surface geochemistry marks the Anthropocene in Australia

Marx, Samuel K., McGowan, Hamish A., Kamber, Balz S., Knight, Jon M., Denholm, John and Zawadzki, Atun (2014) Unprecedented wind erosion and perturbation of surface geochemistry marks the Anthropocene in Australia. Journal of Geophysical Research: Earth Surface, Early View 1-17. doi:10.1002/2013JF002948

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Author Marx, Samuel K.
McGowan, Hamish A.
Kamber, Balz S.
Knight, Jon M.
Denholm, John
Zawadzki, Atun
Title Unprecedented wind erosion and perturbation of surface geochemistry marks the Anthropocene in Australia
Journal name Journal of Geophysical Research: Earth Surface   Check publisher's open access policy
ISSN 2169-9003
2169-9011
Publication date 2014-01-14
Year available 2014
Sub-type Article (original research)
DOI 10.1002/2013JF002948
Volume Early View
Start page 1
End page 17
Total pages 17
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
Australia, the last continent to undergo industrial development, is an ideal environment in which to quantify the magnitude of human-induced environmental change during the Anthropocene because its entire agricultural and industrial history has occurred within this period. Analysis of an alpine peat mire showed that rapid industrial and agricultural development (both pastoral and cropping) over the past 200 years has resulted in significant environmental change in Australia. Beginning in the 1880s, rates of wind erosion and metal enrichment were up to 10 and 30 times that of background natural conditions, respectively. Increased dust deposition and an expansion in dust source areas were found to map the progression of European farming across the continent, while dust deposition pulses in the mire matched known land degradation events. After 1990 dust deposition decreased, returning to pre-1880 rates. This was attributed to three factors: net soil loss following more than a century of agricultural activity, increased environmental awareness and soil conservation, and changing windiness. Metal enrichment in the mire reached approximately 2 times natural background accumulation rates by the 1980s as Australia's mining industry expanded. However, metal enrichment continued to increase after the 1980s reaching an average of ~5 times background rates by 2006 and reflecting increased mineral resource development in Australia. Collectively, the results show that changes to Australia's geochemical and sedimentary systems, as a result of agricultural and industrial development, have profoundly changed the Australian environment during the past two centuries.
Keyword Wind erosion
Agriculture metal pollution
Soil loss
Biogeochemical cycles
Human impacts
Environmental change
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Authors prepress title: "Australia’s Anthropocene: a legacy of wind erosion and heavy metal contamination". Article first published online: 14 JAN 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Wed, 19 Feb 2014, 03:00:17 EST by Claire Lam on behalf of School of Geography, Planning & Env Management