from Part III - Synoptic Paleoclimate from the Natural Archive – Environmental Impact to PaleoWeather Regimes
Published online by Cambridge University Press: 09 September 2025
This chapter focuses on the glaciochemistry of Antarctic ice cores and their applications as aerosol tracers of atmospheric, sea ice, and oceanic variability. Marine aerosol–climate relationships are discussed using marine boundary layer, air–sea exchange, and cloud science. Glaciochemistry theory is presented for interpreting marine ion concentrations in ice cores as circumAntarctic wind-field and paleoweather tracers, sea ice extent, concentration, and polynya tracers. Similarly, non-marine aerosol ion glaciochemistry is examined, with applications including nitrate concentration as polar stratosphere and katabatic wind-field proxies; non-sea-salt sulphate as a volcanism proxy; and mineral dust as long-range air-mass tracers. Dust typing and mineral fingerprinting methods are discussed to identify Southern Hemisphere source areas. Air mass trajectory methods, both forward and backward, are presented to relate ice core ion glaciochemistry and dust particles as aerosol tracers to reconstruct large-scale atmospheric circulation, climate mode, and regional weather regime history during the interglacial and glacial periods.
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