Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19
Abstract The Global Boundary Stratotype Section and Point (GSSP) defining the base of the Chibanian Stage and Middle Pleistocene Subseries at the Chiba section, Japan, was ratified on January 17, 2020. Although this completed a process initiated by the International Union for Quaternary Research in...
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ftdoajarticles:oai:doaj.org/article:fe73f683a6904896a28865c43395bb8a 2023-05-15T13:30:30+02:00 Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 Martin J. Head 2021-09-01T00:00:00Z https://doi.org/10.1186/s40645-021-00439-2 https://doaj.org/article/fe73f683a6904896a28865c43395bb8a EN eng SpringerOpen https://doi.org/10.1186/s40645-021-00439-2 https://doaj.org/toc/2197-4284 doi:10.1186/s40645-021-00439-2 2197-4284 https://doaj.org/article/fe73f683a6904896a28865c43395bb8a Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-38 (2021) Early–Middle Pleistocene Quaternary GSSP MIS 19 Chiba Geography. Anthropology. Recreation G Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1186/s40645-021-00439-2 2022-12-31T07:00:44Z Abstract The Global Boundary Stratotype Section and Point (GSSP) defining the base of the Chibanian Stage and Middle Pleistocene Subseries at the Chiba section, Japan, was ratified on January 17, 2020. Although this completed a process initiated by the International Union for Quaternary Research in 1973, the term Middle Pleistocene had been in use since the 1860s. The Chiba GSSP occurs immediately below the top of Marine Isotope Substage (MIS) 19c and has an astronomical age of 774.1 ka. The Matuyama–Brunhes paleomagnetic reversal has a directional midpoint just 1.1 m above the GSSP and serves as the primary guide to the boundary. This reversal lies within the Early–Middle Pleistocene transition and has long been favoured to mark the base of the Middle Pleistocene. MIS 19 occurs within an interval of low-amplitude orbital eccentricity and was triggered by an obliquity cycle. It spans two insolation peaks resulting from precession minima and has a duration of ~ 28 to 33 kyr. MIS 19c begins ~ 791–787.5 ka, includes full interglacial conditions which lasted for ~ 8–12.5 kyr, and ends with glacial inception at ~ 774–777 ka. This inception has left an array of climatostratigraphic signals close to the Early–Middle Pleistocene boundary. MIS 19b–a contains a series of three or four interstadials often with rectangular-shaped waveforms and marked by abrupt (< 200 year) transitions. Intervening stadials including the inception of glaciation are linked to the calving of ice sheets into the northern North Atlantic and consequent disruption of the Atlantic meridional overturning circulation (AMOC), which by means of the thermal bipolar seesaw caused phase-lagged warming events in the Antarctic. The coherence of stadial–interstadial oscillations during MIS 19b–a across the Asian–Pacific and North Atlantic–Mediterranean realms suggests AMOC-originated shifts in the Intertropical Convergence Zone and pacing by equatorial insolation forcing. Low-latitude monsoon dynamics appear to have amplified responses regionally although ... Article in Journal/Newspaper Antarc* Antarctic North Atlantic Directory of Open Access Journals: DOAJ Articles Antarctic Pacific The Antarctic Progress in Earth and Planetary Science 8 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Early–Middle Pleistocene Quaternary GSSP MIS 19 Chiba Geography. Anthropology. Recreation G Geology QE1-996.5 |
spellingShingle |
Early–Middle Pleistocene Quaternary GSSP MIS 19 Chiba Geography. Anthropology. Recreation G Geology QE1-996.5 Martin J. Head Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
topic_facet |
Early–Middle Pleistocene Quaternary GSSP MIS 19 Chiba Geography. Anthropology. Recreation G Geology QE1-996.5 |
description |
Abstract The Global Boundary Stratotype Section and Point (GSSP) defining the base of the Chibanian Stage and Middle Pleistocene Subseries at the Chiba section, Japan, was ratified on January 17, 2020. Although this completed a process initiated by the International Union for Quaternary Research in 1973, the term Middle Pleistocene had been in use since the 1860s. The Chiba GSSP occurs immediately below the top of Marine Isotope Substage (MIS) 19c and has an astronomical age of 774.1 ka. The Matuyama–Brunhes paleomagnetic reversal has a directional midpoint just 1.1 m above the GSSP and serves as the primary guide to the boundary. This reversal lies within the Early–Middle Pleistocene transition and has long been favoured to mark the base of the Middle Pleistocene. MIS 19 occurs within an interval of low-amplitude orbital eccentricity and was triggered by an obliquity cycle. It spans two insolation peaks resulting from precession minima and has a duration of ~ 28 to 33 kyr. MIS 19c begins ~ 791–787.5 ka, includes full interglacial conditions which lasted for ~ 8–12.5 kyr, and ends with glacial inception at ~ 774–777 ka. This inception has left an array of climatostratigraphic signals close to the Early–Middle Pleistocene boundary. MIS 19b–a contains a series of three or four interstadials often with rectangular-shaped waveforms and marked by abrupt (< 200 year) transitions. Intervening stadials including the inception of glaciation are linked to the calving of ice sheets into the northern North Atlantic and consequent disruption of the Atlantic meridional overturning circulation (AMOC), which by means of the thermal bipolar seesaw caused phase-lagged warming events in the Antarctic. The coherence of stadial–interstadial oscillations during MIS 19b–a across the Asian–Pacific and North Atlantic–Mediterranean realms suggests AMOC-originated shifts in the Intertropical Convergence Zone and pacing by equatorial insolation forcing. Low-latitude monsoon dynamics appear to have amplified responses regionally although ... |
format |
Article in Journal/Newspaper |
author |
Martin J. Head |
author_facet |
Martin J. Head |
author_sort |
Martin J. Head |
title |
Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
title_short |
Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
title_full |
Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
title_fullStr |
Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
title_full_unstemmed |
Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19 |
title_sort |
review of the early–middle pleistocene boundary and marine isotope stage 19 |
publisher |
SpringerOpen |
publishDate |
2021 |
url |
https://doi.org/10.1186/s40645-021-00439-2 https://doaj.org/article/fe73f683a6904896a28865c43395bb8a |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-38 (2021) |
op_relation |
https://doi.org/10.1186/s40645-021-00439-2 https://doaj.org/toc/2197-4284 doi:10.1186/s40645-021-00439-2 2197-4284 https://doaj.org/article/fe73f683a6904896a28865c43395bb8a |
op_doi |
https://doi.org/10.1186/s40645-021-00439-2 |
container_title |
Progress in Earth and Planetary Science |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766009572975181824 |