A high-resolution air chemistry record from an Alpine ice core: Fiescherhorn glacier, Swiss Alps ...

• Main Authors: Schwikowski, M., Brütsch, S., Gäggeler, H. W., Schotterer, U.
• Format: Text
• Language: unknown
• Published: American Geophysical Union 1999
• Subjects: 570 Life sciences; biology; 540 Chemistry; 530 Physics; ice core
• Online Access: https://dx.doi.org/10.48350/158729; https://boris.unibe.ch/158729/

Glaciochemical studies at midlatitudes promise to contribute significantly to the understanding of the atmospheric cycling of species with short atmospheric lifetimes. Here we present results of chemical analyses of environmentally relevant species performed on an ice core from Fiescherhorn glacier, Swiss Alps (3890 m above sea level). This glacier site is unique since it is located near the high-alpine research station Jungfraujoch. There long-term meteorological and air quality measurements exist, which were used to calibrate the paleodata. The 77-m-long ice core was dated by annual layer counting using the seasonally varying signals of tritium and δ18O. It covers the time period 1946–1988 and shows a high net accumulation of water of 1.4 m yr−1 allowing for the reconstruction of high-resolution environmental records. Chemical composition was dominated by secondary aerosol constituents as well as mineral dust components, characterizing the Fiescherhorn site as a relatively unpolluted continental site. ...