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The high resolution record of atmospheric selenium recovered from Greenland snow

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The high resolution record of atmospheric selenium recovered from Greenland snow
Other Titles
그린란드 주상 눈시료에서 복원한 대기 중 셀레늄 변화 연구
Lee, Khanghyun
Hong, Sungmin
Hur, Soon Do
Chung, Ji Woong
Lee, Jeonghoon
Hong, Sang-Bum
Issue Date
Lee, Khanghyun, et al. 2015. The high resolution record of atmospheric selenium recovered from Greenland snow. Arctic Science Summit Week 2015. Toyama International Conference Center. 2015.04.27~2015.04.30.
Selenium concentrations were determined in a continuous series of 70 snow samples collected from a 3.2 m snow pit at northwestern Greenland together with soluble ions such as sodium (Na+), calcium (Ca2+), methanesulfonic acid (MSA), sulfate (SO4 2-) and oxygen isotope ratio (δ18O). The Se concentrations in the snow samples at the low pg/g level were successfully determined using the inductively coupled plasma sector field mass Spectrometry (ICP-SF-MS) with an APEX high-sensitivity inlet system and ACM membrane desolvation module. The well defined depth profiles of δ18O, Na+ and Ca2+ indicated that the snow pit samples covered the time period from spring 2003 to summer 2009. A strong variability in Se concentrations, ranging from 7.2 to 45.1 pg/g, are observed with generally higher values during winter and spring and lower values during summer and fall. Concentrations of Se showed rather significant correlations with Ca2+ (r=0.400) and non-sea salt SO4 2- (r=0.447), indicating that significant anthropogenic Se input to the snow is likely controlled by the seasonality of transport efficiency of anthropogenic Se from the source regions of Asia. The high Se/MSA ratios and crustal enrichment factors are generally coincident with relatively high Se concentrations. This supports that a significant part of Se present in the snow layers is primarily attributed to anthropogenic inputs.
Conference Name
Arctic Science Summit Week 2015
Conference Place
Toyama International Conference Center
Conference Date
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