Stable isotopes in the basal silty ice preserved in the Greenland Ice Sheet at summit; environmental implications

• Published in: Geophysical Research Letters
• Main Authors: Souchez, R., Tison, J.-L., Lorrain, R., Lemmens, M., Janssens, L., Stievenard, M., Jouzel, J., Sveinbjörnsdottir, A., Johnsen, S.
• Other Authors: Laboratoire de Modélisation du Climat et de l'Environnement (LMCE)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1994
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Greenland; GRIP; Ice Sheet
• Online Access: https://hal.archives-ouvertes.fr/hal-03334842; https://hal.archives-ouvertes.fr/hal-03334842/document; https://hal.archives-ouvertes.fr/hal-03334842/file/grl1994Souchez693.pdf; https://doi.org/10.1029/94GL00641

International audience 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.