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A Preliminary Assessment of the Potential Application of Glaciochemical Investigations on Heard Island, South Indian Ocean

  • Mary Jo Spencer (a1), Paul A. Mayewski (a1), Wm. Berry Lyons (a1) and Martin R. Hendy (a2)

Abstract

Analyses of fluoride, chloride, sodium, sulfate, bromide, nitrate, and iron from a 3 m snow pit on Heard Island, collected at an elevation of 2450, m are used to assess the potential of glaciochemical studies on. Heard Island glaciers. Sources for the chemical species are identified and, in particular, chloride, sodium, and sulfate are found to be useful seasonal indicators. The total record measured is believed to be less than one mass-balance year.

Résumé

On a utilisé des analyses de fluorures, chlorures, sodium, sulfates, bromures, nitrates et fer effectuées dans un carrotage de neige dans Heard Island prélevé à une altitude de 2450 m, en vue d’évaluer les possibilités des études glaciochimiques sur les glaciers de Heard Island. On a identifié les sources des différents corps chimiques, en particulier les chlorures, le sodium et les sulfates se sont montrés de bons indicateurs de saison. L’ensemble de la tranche de neige analysée ne dépasse pas, croit-on, une accumulation annuelle.

Zusammenfassung

Analysen des Fluorid-, Chlorid-, Sodium-, Sulfat-, Bromid-, Nitrat- und Eisengehaltes aus einem 3 m tiefen Schneeschacht in 2450 m Hӧhe auf Heard Island werden zur Einschätzung der Leistungsfähigkeit glazialchemischer Studien an den Gletschern der Insel herangezogen. Die Quellen für die chemischen Bestandteile werden festgestellt; speziell erweisen sich Chlorid, Sodium und Sulfat als nützliche jahreszeitliche Indikatoren. Es wird vermutet, dass die untersuchte Schicht weniger als ein Massenbilanzjahr erfassen.

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References

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A Preliminary Assessment of the Potential Application of Glaciochemical Investigations on Heard Island, South Indian Ocean

  • Mary Jo Spencer (a1), Paul A. Mayewski (a1), Wm. Berry Lyons (a1) and Martin R. Hendy (a2)

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