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Stable isotopes in the basal silty ice preserved in the Greenland Ice Sheet at summit; environmental implications
Author(s) -
Souchez R.,
Tison J.L.,
Lorrain R.,
Lemmens M.,
Janssens L.,
Stievenard M.,
Jouzel J.,
Sveinbjörnsdottir A.,
Johnsen S. J.
Publication year - 1994
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 - 10.1029/94gl00641
Subject(s) - ice sheet , ice sheet model , geology , ice stream , ice core , greenland ice sheet , arctic ice pack , ice divide , context (archaeology) , cryosphere , sea ice , physical geography , oceanography , paleontology , geography
Modelling ice sheet behaviour in the context of climatic changes depends on initial and boundary conditions which can be better defined by studying the composition of basal ice. This study deals with basal ice reached by deep drilling at Summit in Central Greenland (GRIP core). The isotopic composition of this ice indicates that ice formed at the ground surface in the absence of the ice sheet largely contributed to its formation. The basal silty ice is a remnant of a growing stage of the ice sheet, possibly the original build up.