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Postglacial Sea level Rise Curve and Meltwater Pulses (MWP) Meltwater pulse 1B (MWP1b) is the name used by Quaternary geologists, paleoclimatologists, and oceanographers for a period of either rapid or just accelerated post-glacial sea level rise that some hypothesize to have occurred between 11,500 and 11,200 years ago at the beginning of the Holocene and after the end of the Younger Dryas. [1]
The Arctic Ocean is the mass of water positioned approximately above latitude 65° N. Arctic Sea Ice refers to the area of the Arctic Ocean covered by ice. The Arctic sea ice minimum is the day in a given year when Arctic sea ice reaches its smallest extent, occurring at the end of the summer melting season, normally during September.
Image showing sea level change during the end of the last glacial period. Meltwater pulse 1A is indicated. Meltwater pulse 1A (MWP1a) is the name used by Quaternary geologists, paleoclimatologists, and oceanographers for a period of rapid post-glacial sea level rise, between 13,500 and 14,700 years ago, during which the global sea level rose between 16 meters (52 ft) and 25 meters (82 ft) in ...
A model of present-day mass change due to post-glacial rebound and the reloading of the ocean basins with seawater. Blue and purple areas indicate rising due to the removal of the ice sheets. Yellow and red areas indicate falling as mantle material moved away from these areas in order to supply the rising areas, and because of the collapse of ...
The Atlantic meridional overturning circulation (AMOC) is the main ocean current system in the Atlantic Ocean. [ 134 ] : 2238 It is a component of Earth's ocean circulation system and plays an important role in the climate system .
Evidence of ocean acidification can be gleaned from δ 44/40 Ca increases coeval with the extinction event, [62] [63] [64] as well as coccolith malformation and dwarfism. [65] Lithologies characterised by low calcium carbonate concentrations predominated during intervals of carbonate compensation depth shoaling. [3]
Solid geological evidence, based largely upon analysis of deep cores of coral reefs, exists only for three major periods of accelerated sea level rise, called meltwater pulses, during the last deglaciation.
Retreating glaciers could expose more land to weathering, which would be a more sustained source of phosphates flowing into the ocean. [80] There is also evidence implicating volcanism as a contributor to Late Hirnantian anoxia. [97] There were few clear patterns of extinction associated with the second extinction pulse.