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GCM analysis of local influences on ice core δ signals
Author(s) -
Krinner Gerhard,
Genthon Christophe,
Jouzel Jean
Publication year - 1997
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 - 10.1029/97gl52891
Subject(s) - ice core , gcm transcription factors , climatology , geology , precipitation , paleoclimatology , ice sheet , borehole , climate change , atmospheric sciences , general circulation model , geomorphology , paleontology , oceanography , meteorology , geography
A high resolution GCM is used to examine the effect of changes in local surface climate parameters on the ice sheets that can influence the interpretation of the isotopic signal of the ice from deep cores. The model suggests that the 10°C difference between the LGM surface temperature deduced from borehole thermometry and that deduced from the water isotope analysis to a great extent may be due to a modification of the precipitation seasonality in central Greenland. For central East Antarctica, the model tends to suggest a weak opposite bias.