Back to Search
Start Over
Subpolar North Atlantic sea surface temperature since 6 ka BP: Indications of anomalous ocean-atmosphere interactions at 4-2 ka BP.
- Source :
-
Quaternary Science Reviews . Aug2018, Vol. 194, p128-142. 15p. - Publication Year :
- 2018
-
Abstract
- Atmospheric circulation may change with future climate change in response to modification of meridional temperature gradients, but the potential influence on ocean circulation is as yet unclear. Over the mid-late Holocene, atmospheric circulation in the North Atlantic region has fluctuated on millennial timescales; therefore, the ocean response to these changes can be investigated using the paleoceanographic records that have been developed in the north-eastern subpolar North Atlantic. Here, we present a diatom-based sea surface temperature reconstruction from the Iceland Basin, south of Iceland; the reconstruction shows the warmest temperatures of the record at 6.1–4 ka BP, cooler temperatures at 4-2 ka BP and warmer temperatures thereafter. Inter-record comparisons indicate that the cold period at c. 4-2 ka BP may have resulted from a strengthened East Greenland Current and/or melting of the Greenland ice sheet, in response to a negative North Atlantic Oscillation. The findings highlight that atmospheric circulation changes are likely to cause pronounced variations in the latitudinal exchange of heat, which may have consequences for deep-water formation and global ocean circulation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OCEAN temperature
*ATMOSPHERIC circulation
*CLIMATE change
*PALEOCEANOGRAPHY
Subjects
Details
- Language :
- English
- ISSN :
- 02773791
- Volume :
- 194
- Database :
- Academic Search Index
- Journal :
- Quaternary Science Reviews
- Publication Type :
- Academic Journal
- Accession number :
- 130949239
- Full Text :
- https://doi.org/10.1016/j.quascirev.2018.07.007