Английская Википедия:Early Holocene sea level rise
The early Holocene sea level rise (EHSLR) was a significant jump in sea level by about Шаблон:Convert during the early Holocene, between about 12,000 and 7,000 years ago, spanning the Eurasian Mesolithic.[1] The rapid rise in sea level and associated climate change, notably the 8.2 ka cooling event (8,200 years ago), and the loss of coastal land favoured by early farmers, may have contributed to the spread of the Neolithic Revolution to Europe in its Neolithic period.[2]
During deglaciation since the Last Glacial Maximum, between about 20,000 to 7,000 years ago (20–7 ka), the sea level rose by a total of about Шаблон:Convert, at times at extremely high rates, due to the rapid melting of the British-Irish Sea, Fennoscandian, Laurentide, Barents-Kara, Patagonian, Innuitian and parts of the Antarctic ice sheets. At the onset of deglaciation about 19,000 years ago, a brief, at most 500-year long, glacio-eustatic event may have contributed as much as Шаблон:Convert to sea level with an average rate of about Шаблон:Convert/yr. During the rest of the early Holocene, the rate of sea level rise varied from a low of about Шаблон:Convert/yr to as high as Шаблон:Convert/yr during brief periods of accelerated sea level rise.[3][4]
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. The first, Meltwater pulse 1A, lasted between c. 14.6–14.3 ka and was a Шаблон:Convert rise over about 290 years centered at 14.2 ka.
The EHSLR spans Meltwater pulses 1B and 1C, between 12,000 and 7,000 years ago:
- Meltwater pulse 1B between c. 11.4–11.1 ka, a Шаблон:Convert rise over about 160 years centered at 11.1 ka, which includes the end of Younger Dryas interval of reduced sea level rise at about Шаблон:Convert/yr;
- Meltwater pulse 1C between c. 8.2–7.6 ka, centered at 8.0 ka, a rise of Шаблон:Convert in less than 140 years.[4][5][6]
Such rapid rates of sea level rising during meltwater events clearly implicate major ice-loss events related to ice sheet collapse. The primary source may have been meltwater from the Antarctic ice sheet. Other studies suggest a Northern Hemisphere source for the meltwater in the Laurentide Ice Sheet.[6]
There is a hypothesis that the EHSLR left some traces in the mythology like flood myths and oral history of Australian Aborigines.[7]
See also
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References
- Torbjörn E. Törnqvist, Marc P. Hijma, "Links between early Holocene ice-sheet decay, sea-level rise and abrupt climate change", Nature Geoscience vol. 5 (2012), 601–606.
- T. M. Cronin P. R. Vogt D. A. Willard R. Thunell J. Halka M. Berke J. Pohlman, "Rapid sea level rise and ice sheet response to 8,200‐year climate event", Geophysical Research Letters vol. 34, issue 20 (October 2007), Шаблон:Doi.
- Kazuaki Hori Yoshiki Saito, "An early Holocene sea‐level jump and delta initiation", Geophysical Research Letters vol. 34, issue 18 (September 2007), Шаблон:Doi.
- Shi-Yong Yu, Y.-X. Li and T.E. Törnqvist, "Tempo of global deglaciation during the early Holocene: A sea level perspective", PAGES News vol. 17, no. 2 (June 2009), Шаблон:Doi.
