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Mt. Everest Ice Core Record of Atmospheric Cu, Zn, Cd, Pb, and Pb Isotopes Variations in Central Asia during the Past 800 Years

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Title
Mt. Everest Ice Core Record of Atmospheric Cu, Zn, Cd, Pb, and Pb Isotopes Variations in Central Asia during the Past 800 Years
Other Titles
에베레스트 빙하코어에 기록된 지난 800년간의 중앙아시아에서의 대기중의 Cu, Zn, Cd, Pb와 Pb 동위원소 변화
Authors
Lee, Khanghyun
L.J.Burn-Nunes
C.Boutron
S.Hou
C Barbante
S.Hong
Hur, Soon Do
Keywords
Mt. Everest ice core; Pb isotopes; Trace elements; anthropogenic pertubation
Issue Date
2010
Citation
Lee, Khanghyun, et al. 2010. Mt. Everest Ice Core Record of Atmospheric Cu, Zn, Cd, Pb, and Pb Isotopes Variations in Central Asia during the Past 800 Years. ICHMET. ICHMET. 2010.09.19~.
Abstract
Recent century scale time records for As, Mo, Sn, Sb, Bi, U, and Cs from Mt. Everest ice cores documented that a significant perturbation in the natural cycles of these elements took place during the second half of the 20th century due to increasing emissions of anthropogenic pollutants largely from fossil fuel combustion and non-ferrous metals production in central Asia. To evaluate to what extent human activities in central Asia have affected the natural atmospheric cycles of other heavy metals over time, Cu, Zn, Cd, and Pb concentrations and Pb isotopes were determined at 143 depth intervals from high-altitude Mt. Everest ice cores, covering an 800-year time period from 1205 to 2002 AD. This is the first reliable long-term time series of changes in the occurrence of Cu, Zn, Cd, and Pb and Pb isotopes in the remote Himalayan atmosphere. Our data show that these metals were primarily of natural origin up until the 1960s and significant increases in concentrations and crustal enrichment factors are observed from the 1970s onward. Such changes are attributed to massive emissions of anthropogenic Cu, Zn, Cd, and Pb from various anthropogenic sources in India. The Pb isotopic compositions provide clear evidence that anthropogenic Pb emitted from the use of leaded gasoline and coal combustion in India has affected the remote Himalayan atmosphere.
URI
http://repository.kopri.re.kr/handle/201206/8060
Conference Name
ICHMET
Conference Place
ICHMET
Conference Date
2010.09.19~
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