From Physorg, news of a new paper (no link yet) which may shed light on the rapid warming at the end of the last ice age. The young scientists don’t mention Milankovitch cycles in this presser, but these are slow to change in comparison to the rapid deglaciation, so maybe their theory lends something to the story. It does lead me to wonder if the precession cycle might be involved with bringing the oceanic oscillations into synch though.
Synchronization of North Atlantic, North Pacific preceded abrupt warming, end of ice age
A newly published study by researchers at Oregon State University probed the geologic past to understand mechanisms of abrupt climate change. The study pinpoints the emergence of synchronized climate variability in the North Pacific Ocean and the North Atlantic Ocean a few hundred years before the rapid warming that took place at the end of the last ice age about 15,000 years ago.
The study suggests that the combined warming of the two oceans may have provided the tipping point for abrupt warming and rapid melting of the northern ice sheets.
“If we really do cross such a boundary in the future, we should probably take a long-term perspective and realize that change will become the new normal. It may be a wild ride.”
Results of the study, which was funded by the National Science Foundation, appear this week in Science.