Could meltwater pulses have been sneaked unnoticed into the deep ocean during the last glacial?
(2007) Geophysical Research Letters — Vol. 34, n° 24, p. L24708 (2007)
Files
Roche.pdf
Restricted Access - Adobe PDF
- 501.21 KB
Details
- Authors
- Abstract
- The lack of climatic imprint l eft by t he Meltwa t er Pulse-1A ( ’ 14.5 ka BP), equivalent to a sea-level rise of 14 to 20 meters, is puzzling . Recent studies sugge st the event might have occurre d as a hyperpycnal flow i n t he Gulf of Me xico, preve nting its detection in oc eanic records throughout the North Atlantic. We present a suite of simula tions with the LOVECLIM climate model, which mimic th e e ffect of h yperp ycnal f low u nder LGM conditions, in a first attempt to constrain its climatic effects. Analysing the ocean dynamics associated with the anomalous freshwater input, we show that the proposed mechanism is capable of sneaking a signif i cant propo rtion of the MWP into the ocean ( ’ 6 meters equivalent sea-level rise using our model under LGM boundary cond itions). We also de monstrate t hat, in our model, the meridional circulati on i s more sensitive t o such inputs i n t he Arctic Ocean than in the Gulf of Mexico.
- Affiliations
Citations
Roche, D. M., Renssen, H., Weber, S. L., & Goosse, H. (2007). Could meltwater pulses have been sneaked unnoticed into the deep ocean during the last glacial? Geophysical Research Letters, 34(24), L24708. https://doi.org/10.1029/2007GL032064 (Original work published 2007)