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Variability of Arctic climate and sea ice over the past millennium: implications for ice cap mass balance |
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Two short cores, one from the south and one from the north summit of the PoW icefield (shown as red dots) were obtained in 2003. Paleoenvironmental proxies from these cores can be used in conjunction with climate reanalysis data to establish relationships between proxy data and climatic conditions. Two long cores were drilled at the northern summit of PoW ice field in spring 2005, as well as a 40m core to be used for testing the sulfur isotope partitioning techniques. The drill used was a electro-mechanical tipping tower ice core drill that produces cores about 1 m long and 83 mm in diameter; the drilling depth is recorded continuously using a depth counter and encoder mounted on the tower assembly. The cores are stored in plastic tubes and packed in rigid insulated boxes for transport. |
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Snow samples were taken for chemical analysis along transects across both the south and the north summits of the PoW icefield in summer 2001 (green dots) and 2002 (blue dots), and additional sites were sampled for sulfur isotpes. These snow pit studies are used to constrain the seasonal and spatial variability of various chemical species in this region.