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Meltwater pulse 1A information


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 calendar 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 40–60 mm (0.13–0.20 ft)/yr.[1] Meltwater pulse 1A is also known as catastrophic rise event 1 (CRE1) in the Caribbean Sea.[2] The rates of sea level rise associated with meltwater pulse 1A are the highest known rates of post-glacial, eustatic sea level rise. Meltwater pulse 1A is also the most widely recognized and least disputed of the named, postglacial meltwater pulses. Other named, postglacial meltwater pulses are known most commonly as meltwater pulse 1A0 (meltwater pulse 19ka), meltwater pulse 1B, meltwater pulse 1C, meltwater pulse 1D, and meltwater pulse 2. It and these other periods of rapid sea level rise are known as meltwater pulses because the inferred cause of them was the rapid release of meltwater into the oceans from the collapse of continental ice sheets.[1][3]

  1. ^ a b Cronin, T.M. (2012). "Rapid sea-level rise". Quaternary Science Reviews. 56: 11–30. Bibcode:2012QSRv...56...11C. doi:10.1016/j.quascirev.2012.08.021.
  2. ^ Blanchon, P., and J. Shaw (1995) Reef drowning during the last deglaciation: Evidence for catastrophic sea-level rise and ice-sheet collapse. Geology. 23(1):4-8.
  3. ^ Gornitz, Vivien (2009). Encyclopedia of paleoclimatology and ancient environments. Springer. p. 890 (Table S1). ISBN 978-1-4020-4551-6.

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Meltwater pulse 1A

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Meltwater pulse 1A (MWP1a) is the name used by Quaternary geologists, paleoclimatologists, and oceanographers for a period of rapid post-glacial sea level...

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Meltwater pulse 1B

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most commonly as meltwater pulse 1A0 (meltwater pulse19ka), meltwater pulse 1A, meltwater pulse 1C, meltwater pulse 1D, and meltwater pulse 2. It and these...

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Meltwater

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meltwater in Asia. The predicted trend of glacial melt signifies seasonal climate extremes in these regions of Asia. Historically Meltwater pulse 1A was...

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Early Holocene sea level rise

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accelerated sea level rise, called meltwater pulses, during the last deglaciation. The first, Meltwater pulse 1A, lasted between c. 14.6–14.3 ka and...

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Geology of New England

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Sheet during the Meltwater Pulse 1a (MWP-1A) which could mean the LIS was a main source of glacial meltwater during this time. After MWP-1A, around 12.9 ka...

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1A

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elements AMY1A, a human gene Alpha-1A adrenergic receptor, a human gene Interferon beta-1a, a drug Meltwater pulse 1A, a period of rapid post-glacial sea...

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Polystrate fossil

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meters (330 ft). As occurred during the Holocene Epoch for Meltwater pulse 1A and Meltwater pulse 1B, brief episodes of rapid melting of Carboniferous, Gondwanan...

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Younger Dryas

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meltwater pulses, occurred. They are commonly called meltwater pulse 1A0 for the pulse between 19,000~19,500 calibrated years ago; meltwater pulse 1A...

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Past sea level

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called meltwater pulses, during the last deglaciation. They are Meltwater pulse 1A between circa 14,600 and 14,300 years ago; Meltwater pulse 1B between...

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Atlantic meridional overturning circulation

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caused a outburst of sea level rise from ice sheet collapse, known as Meltwater Pulse 1A. The Bølling and Allerød stages of the interglacial were separated...

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Sea level

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antenna towers List of places on land with elevations below sea level Meltwater pulse 1A – Period of rapid post-glacial sea level rise Metres above the Adriatic –...

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Marine Isotope Stage 5

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ago, the Indian Summer Monsoon (ISM) declined in overall intensity. Meltwater pulse 1A Paleothermometer Proxy (climate) Timeline of glaciation Medley, S...

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Coral reef

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2004). "Drowning of the −150 m reef off Hawaii: A casualty of global meltwater pulse 1A?". Geology. 32 (3): 249. Bibcode:2004Geo....32..249W. doi:10.1130/G20170...

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Location hypotheses of Atlantis

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was an accelerated sea level rise of 4 meters per century known as Meltwater pulse 1A, which drowned the top of the main island. The occurrence of a great...

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Tipping points in the climate system

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Holocene, sea level rise was not smooth, but rose abruptly during meltwater pulses. The monsoon in North Africa saw abrupt changes on decadal timescales...

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Marine Isotope Stage 11

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kyrs even in the absence of anthropogenic forcing.[citation needed] Meltwater pulse 1A Paleothermometer Proxy (climate) Timeline of glaciation Lisiecki,Lorraine...

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Detailed logarithmic timeline

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Prosser Scully) F. Sirocko; et al. (Aug 11, 2005). "A late Eemian aridity pulse in central Europe during the last glacial inception". Nature. 436 (7052):...

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Timeline of environmental history

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Beginning of the Holocene extinction. Earliest evidence of warfare. Meltwater pulse 1A raises sea level 20 meters. Missoula floods occur. c. 12,670 BC c...

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Outline of oceanography

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long-term climate change studies Meltwater pulse 1A – A period of rapid post-glacial sea level rise Meltwater pulse 1B – A period of either rapid or just...

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2020 in the environment and environmental sciences

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Bjarte (May 2020). "Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago". Nature Geoscience. 13 (5): 363–368. Bibcode:2020NatGe...

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Anoxic event

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nutrients through wind-driven upwelling or an influx of nutrient-rich meltwater from melting glaciers, which by virtue of its fresh nature would also...

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