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Calibration of an ice-core glaciochemical (sea-salt) record with sea-ice variability in the Canadian Arctic

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Correlation between glaciochemical time series from an ice core collected on Devon Ice Cap, Nunavut, Canada, and gridded time series of sea-ice concentrations reveals statistically significant inverse relationships between sea-salt concentrations (mainly Na+, Mg2+ and Cl) in the ice core and sea-ice cover in Baffin Bay over the period 1980–97. An empirical orthogonal function (EOF) analysis performed on all major ions shows that the dominant mode of glaciochemical variability (EOF1) represents a sea-salt signal, which correlates best with sea-ice concentration in Baffin Bay. On a seasonal basis, the strongest and most spatially extensive anticorrelations are found in Baffin Bay during the fall, followed by spring, summer and winter. These results support the notion that increased open-water conditions in Baffin Bay during the stormy seasons (fall and spring) promote increased production, transport and deposition of sea-salt aerosols on Devon Ice Cap. Comparison of ice-core time series of EOF1, 18O and melt percentage, with air temperatures recorded in Upernavik, Greenland, suggests that ice-cover variations in Baffin Bay over the past ∼145 years were dynamically rather than thermodynamically controlled, with periods of strengthened cyclonic circulation leading to increased open-water conditions, and a greater sea-salt flux on Devon Ice Cap.

Document Type: Research Article


Publication date: 2006-11-01

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  • The Annals of Glaciology is a peer-reviewed, thematic journal published 2 to 4 times a year by the International Glaciological Society (IGS). Publication frequency is determined and volume/issue numbers assigned by the IGS Council on a year-to-year basis and with a lead time of 3 to 4 years. The Annals of Glaciology is included in the ISI Science Citation Index from volume 50, number 50 onwards.

    Themes can be on any aspect of the study of snow and ice. Individual members can make a suggestion for a theme for an Annals issue to the Secretary General, who will forward it to the IGS Publications Committee. The IGS Publication Committee will make a recommendation for an individual themed Annals issue, together with a potential Annals Chief Editor for that issue, to IGS Council. The IGS Council will make the decision whether to proceed, taking into account the spread of topics and the overall capacity for publication of pages in Annals.

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