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Changing influence of Antarctic and Greenlandic temperature records on sea-level over the last glacial cycle
- Source :
-
Quaternary Science Reviews . Feb2010, Vol. 29 Issue 3/4, p410-423. 14p. - Publication Year :
- 2010
-
Abstract
- Abstract: We use a simple model to analyse the relationship between ice core temperature proxy data and global ice volume/eustatic sea-level data over the last glacial cycle (LGC). By allowing the temperature forcing to be a mix of Greenlandic and Antarctic signals we optimise the proportion of this mixing to fit sea-level data. We find that sea-level forcing is best represented by a mix of Antarctic and Greenlandic temperature signals through the whole glacial cycle. We suggest that a distinct bipolar switch occurs which links eustatic sea-level more closely with the Antarctic-like variability during the glacial period (MIS 4, 3 and 2) and more closely to the Greenland-like variability during the last termination (TI) and the interglacial periods (Holocene and MIS 5). This switch may be caused by the spatio-temporal distribution of ice sheet collapse perhaps linked to glacial to interglacial changes in deep water distribution in the ocean, which in turn drive changes in pole-ward heat and moisture transport. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02773791
- Volume :
- 29
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Quaternary Science Reviews
- Publication Type :
- Academic Journal
- Accession number :
- 47827333
- Full Text :
- https://doi.org/10.1016/j.quascirev.2009.11.007