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Victoria University Antarctic Research Expedition Science and Logistics Reports 2007-08: VUWAE 52

Snow sampling

Snow sampling

A 4m deep snow profile was sampled at 1cm resolution using ultra clean snow sampling methodology in order to maximise the array of potential measurable trace elements. These will include Al, As, Ba, Be, Cr, Co, Fe, Li, Mn, P, Rb, Sr, Ti, U, V, Zn. Isotopic (δ18O and δD) and major ion composition will also be measured.

Figure 1: Snow sampling using clean procedure

Figure 1: Snow sampling using clean procedure

All sampling vials, 60ml Nalgene HDPE (high density polythene), were pre-cleaned following the procedure of Osterberg et al6. Preparation includes soaking in 5% trace metal-grade HNO3 for 1 week, triple rinse in DI (deionised, 18 MΩ) water and again soaked in DI H2O. Sampling equipment was triple rinsed, soaked for 4 weeks and triple rinsed again in DI water.

The sampling surface was pre-cleaned using a clean metal spade and the removal of at least 20cm horizontally immediately prior to sampling with a ceramic (ZrO) knife. 1cm thick samples were cut horizontally across the snow into a HDPE tray and transferred into vials. Tyvek clean suits, facemasks and dust free polyethylene gloves were worn to prevent sample contamination from personnel.

Figure 2: AWS at Evans Piedmont Glacier

Figure 2: AWS at Evans Piedmont Glacier