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Pb concentrations and isotopic record preserved in northwest Greenland snow

Cited 6 time in wos
Cited 5 time in scopus
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Pb concentrations and isotopic record preserved in northwest Greenland snow
Other Titles
북서 그린랜드 눈에 나타난 납 농도와 납안정동위원소 비의 기록
Kang, Jung-Ho
Hong, Sung-Min
Kim, Seong-Joong
Hur, Soon Do
Han, Changhee
Hwang, Heejin
Environmental Sciences & Ecology
Issue Date
Kang, Jung-Ho, et al. 2017. "Pb concentrations and isotopic record preserved in northwest Greenland snow". CHEMOSPHERE, 187(1): 294-301.
We present high-resolution lead (Pb) concentrations and isotopic ratios from a northwest Greenland snow pit covering a six-year period between 2003 and 2009. Pb concentrations ranged widely from 2.7 pg g?1 to 97.3 pg g?1, with a mean concentration of 21.6 pg g?1. These values are higher than those recorded for the pre-industrial period. Pb concentrations exhibit seasonal spikes in winter?spring layers. Crustal Pb enrichment factors (EF) suggest that the northwest Greenland snow pit is highly enriched with Pb of predominantly anthropogenic origin. The 206Pb/207Pb ratios ranged from 1.144 to 1.169 with a mean value of 1.156, which fall between less radiogenic Eurasian-type and more radiogenic Canadian-type signatures. This result suggests that several potential source areas of Pb impact on northwest Greenland. Abrupt changes in Pb concentrations and Pb isotope ratios were observed and related to seasonal shifts in source regions of aerosol transport. The 206Pb/207Pb isotope ratio increased steadily between 2003 and 2009. The similarity in isotope ratios between some of our samples and Chinese urban aerosols suggests a steadily increasing contribution of Chinese Pb to northwest Greenland snow.
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