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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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Initial analysis (core stratigraphy; EC; digital image log) was done on one of the long cores in the field, while the second core was bagged up and sealed with minimum handling to be used for sulfur isotope analysis. Back in Ottawa, the National Glaciology program laboratories were prepared for the core processing. A new cutting table was installed, the clean cutting room was certified unltra-clean ready for preapration of the sulfur isotope core, and a new melting system was installed for melting the ice cores at high resolution and with minimal contamination. Schematic of the ice core melter system at the GSC The core for chemical analysis was cut into its archive and analysis components at the GSC cutting room, and 1 m long sections of core were squared off ready for melting on the melter system. 4.5 cm long offcut sections were prepared for oxygen isotope analysis to provide a first estimate of the isotope chronology, although subsequent anlaysis will produce a mucyh higher resolution isotope stratigraphy for the core. |
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