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
- The high resolution record of atmospheric selenium recovered from Greenland snowKhanghyun Lee, Sang Bum Hong, Jeonghoon Lee, Jiwoong Chung, Soon Do Hur, Sungmin Hong. 2015. Arctic Science Summit Week 2015, Toyama International Conference Center, 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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