The fact that the cooling spans are gradual while
warming episodes are short - term and
abrupt is an issue that has been comfortably dealt with yet, regardless of the pet theory applied.
This period, known as the «last deglaciation,» included
episodes of
abrupt climate change, such as the Bølling
warming [~ 14.7 — 14.5 ka], when Northern Hemisphere temperatures increased by 4 — 5 °C in just a few decades [Lea et al., 2003; Buizert et al., 2014], coinciding with a 12 — 22 m sea level rise in less than 340 years [5.3 meters per century](Meltwater Pulse 1a (MWP1a)-RRB-[Deschamps et al., 2012].»