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Resolving climate change in the period 15–23 ka in Greenland ice cores: a new application of spectral trend analysis
Author(s) -
De Jong Mat G. G.,
Nio Djin S.,
Böhm Alain R.,
Seijmonsbergen Harry C.,
De Graaff Leo W. S.
Publication year - 2009
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.2009.00866.x
Subject(s) - ice core , geology , stadial , deglaciation , glacial period , ice sheet model , period (music) , climatology , physical geography , climate change , future sea level , northern hemisphere , cryosphere , paleoclimatology , paleontology , ice stream , oceanography , sea ice , geography , physics , acoustics
Northern Hemisphere climate history through and following the Last Glacial Maximum is recorded in detail in ice cores from Greenland. However, the period between Greenland Interstadials 1 and 2 (15–23 ka), i.e. the period of deglaciation following the last major glaciation, has been difficult to resolve in great detail. We here offer a new subdivision of this in the NGRIP, GRIP and GISP2 ice cores, by newly introducing spectral trend analysis to the study of climate‐related data series from ice cores. This analysis reveals patterns of change and discontinuity in the waveform properties of a data series, relating to the environmental (including climatic) history of accumulation of the rock or ice record. The application allows high‐resolution correlation between the ice cores, and a greatly improved subdivision of the study interval. Nine climatic phases are recognized, within which more identifiable events can also be correlated between the three locations.