Early Preboreal cooling in the Nordic Seas region triggered by meltwater
Early Preboreal cooling in the Nordic Seas region triggered by meltwater
Geology (Boulder) (July 1998) 26 (7): 615-618
- absolute age
- Arctic Ocean
- Barents Sea
- biostratigraphy
- C-14
- carbon
- Cenozoic
- cooling
- cores
- correlation
- dates
- Foraminifera
- Globigerina
- Globigerina bulloides
- Globigerinacea
- Globigerinidae
- high-resolution methods
- Holocene
- Invertebrata
- isotopes
- marine sediments
- Neogloboquadrina
- Neogloboquadrina pachyderma
- Norwegian Sea
- paleo-oceanography
- paleoclimatology
- paleosalinity
- paleotemperature
- planktonic taxa
- Pleistocene
- Preboreal
- Protista
- Quaternary
- radioactive isotopes
- Rotaliina
- sea-surface temperature
- sediments
- upper Pleistocene
- upper Weichselian
- Weichselian
- Younger Dryas
- Globigerina quinqueloba
- Globigerina falconensis
- Globigerinita glutinata
- Globigerina bradyi
At the Younger Dryas-Preboreal transition, a high-resolution core from the northeastern Norwegian Sea reveals a two-step warming of sea surface temperatures dated at respectively 10200-10000 and 9700-9500 (super 14) C yr B.P. (11450-11350 and 11150-11000 cal. yr B.P.). Warming was interrupted by a period having stable temperatures and a reduction in sea surface salinity, and we suggest that this pause in warming was triggered by an increase in freshwater supply that may have hampered the North Atlantic heat conveyor. The freshwater influx correlates to an atmospheric cooling over both the Greenland ice sheet and northwest Europe and to cooling of surface temperatures in the Nordic seas. Freshwater may have been supplied from the waning Fennoscandian ice sheet.
