Meltwater pulse 1A
Meltwater pulse 1A (MWP1a) is the name used by geologists, paleoclimatologists, and oceanographers for a Quaternary period of rapid post-glacial sea level rise between 14,700 and 13,500 years ago, during which the global sea level rose between 16 meters (52 ft) and 25 meters (82 ft) in about 400–500 years, giving mean rates of roughly 30–60 mm (1.2–2.4 in)/yr. MWP1a is also known as catastrophic rise event 1 (CRE1) in the Caribbean Sea.