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Flow‐induced mixing in the GRIP basal ice deduced from the CO 2 and CH 4 records
Author(s) -
Souchez R.,
Lemmens M.,
Chappellaz J.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/94gl02863
Subject(s) - geology , ice stream , mixing (physics) , ice core , ice sheet , pancake ice , antarctic sea ice , ice divide , flow (mathematics) , lead (geology) , arctic ice pack , climatology , sea ice , geomorphology , mechanics , cryosphere , physics , quantum mechanics
This paper documents a larger degree of mixing in ice near the bottom of an ice sheet than described, or suspected, previously. It shows, thanks to favourable circumstances due to CO 2 and CH 4 production underneath the ice, that flow‐induced mixing within the basal ice has taken place at the scale of a few centimeters in the GRIP core. Such a mechanism must be considered when interpreting the ice properties in the bottom part of ice sheets and must be taken into account as a potential process of layer disruption in the low levels of the Central Greenland ice cores.