Very low oxygen concentration in basal ice from Summit, Central Greenland

Autor:	Michèle Lemmens, Laurent Janssens, Bernhard Stauffer, Roland Souchez
Rok vydání:	1995
Předmět:	geography geography.geographical_feature_category 530 Physics Ice stream Geochemistry Greenland ice sheet Antarctic sea ice Arctic ice pack Ice shelf Geophysics Pancake ice Sea ice General Earth and Planetary Sciences Physical geography Ice sheet human activities Geology
Zdroj:	Souchez, R.; Janssens, L.; Lemmens, M.; Stauffer, B. (1995). Very low oxygen concentration in basal ice from Summit, Central Greenland. Geophysical Research Letters, 22(15), pp. 2001-2004. American Geophysical Union 10.1029/95GL01995
DOI:	10.48350/158784
Popis:	Oxygen concentration as low as 3% has been detected in the basal silty ice of the GRIP core. Such values were never observed in ice from ice sheets. They are most probably the consequence of organic matter oxidation in ice developed in a peaty deposit when the Greenland Ice Sheet was not present at the site. Flow-induced mixing has further incorporated this ice into glacier ice during the ice sheet build up. The part of the local ice component in the mixing process diminishes with the distance from the bed. This is the process which explains the oxygen profile.
Databáze:	OpenAIRE
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