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Abstract
In this paper a detailed record of major ions from a 20 m deep firn core from Amundsenisen, western Dronning Maud Land, Antarctica, is presented. The core was drilled at 75° S, 2° E (2900 m a.s.l.) during austral summer 1991/92. The following ions were measured at 3 cm resolution: Na+, Mg2+, Ca2+, Cl−, NO3−, S04 2− and CH3SO3H (MSA). The core was dated back to 1865 using a combination of chemical records and volcanic reference horizons. The volcanic eruptions identified in this core are Mount Ngauruhoe, New Zealand (1974–75), Mount Agung, Indonesia (1963), Azul, Argentina (1932), and a broad peak that corresponds in time toTarawera, New Zealand (1886), Falcon Island, South Shetlands, Southern Ocean (1885), and Krakatau, Indonesia (1883). There are no trends in any of the ion records, but the annual to decadal changes are large. The mean concentrations of the measured ions are in agreement with those from other high-altitude cores from the Antarctic plateau. At this core site there may be a correspondence between peaks in the MSA record and major El Niño–Southern Oscillation events.
Department
Earth Systems Research Center
Publication Date
1-1-2001
Journal Title
Journal of Glaciology
Publisher
Cambridge University Press
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Isaksson, E., Karlén, W., Mayewski, P., Twickler, M., & Whitlow, S. (2001). A high-altitude snow chemistry record from Amundsenisen, Dronning Maud Land, Antarctica. Journal of Glaciology, 47(158), 489-496. doi:10.3189/172756501781832070
Rights
© International Glaciological Society 2001.
Comments
This is an article published by Cambridge University Press. https://dx.doi.org/10.3189/172756501781832070