The high resolution record of atmospheric selenium recovered from Greenland snow
- The high resolution record of atmospheric selenium recovered from Greenland snow
- Lee, Khanghyun
Chung, Ji Woong
Hur, Soon Do
- Issue Date
- Lee, Khanghyun, et al. 2015. The high resolution record of atmospheric selenium recovered from Greenland snow. Arctic Science Summit Week 2015. Toyama, Japan. 2015.04.27.-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 (SOsub>42-
) 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
(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, Japan
- Conference Date
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