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Resolving climate change in the period 15–23 ka in Greenland ice cores: a new application of spectral trend analysis.
- Source :
-
Terra Nova . Apr2009, Vol. 21 Issue 2, p137-143. 7p. 3 Graphs. - Publication Year :
- 2009
-
Abstract
- 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09544879
- Volume :
- 21
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Terra Nova
- Publication Type :
- Academic Journal
- Accession number :
- 36922717
- Full Text :
- https://doi.org/10.1111/j.1365-3121.2009.00866.x