Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V
Glacial-interglacial variations in ice volume and sea level are essential components of the Pleistocene global climate evolution. Deciphering the timing of change of these key climate parameters with respect to the insolation forcing is central to understanding the processes controlling glacial term...
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Online Access: | http://hdl.handle.net/2122/15500 https://doi.org/10.1016/j.quascirev.2021.106976 |
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ftingv:oai:www.earth-prints.org:2122/15500 2023-05-15T17:36:23+02:00 Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V Giaccio, Biagio Marino, Gianluca Marra, Fabrizio Monaco, Lorenzo Pereira, Alison Zanchetta, Giovanni Gaeta, Mario Leicher, Niklas Nomade, Sebastien Palladino, Danilo Mauro Sottili, Gianluca Guillou, Hervé Scao, Vincent Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# 2021 http://hdl.handle.net/2122/15500 https://doi.org/10.1016/j.quascirev.2021.106976 en eng Elsevier Quaternary Science Reviews /263 (2021) 0277-3791 http://hdl.handle.net/2122/15500 doi:10.1016/j.quascirev.2021.106976 open article 2021 ftingv https://doi.org/10.1016/j.quascirev.2021.106976 2022-07-29T06:08:45Z Glacial-interglacial variations in ice volume and sea level are essential components of the Pleistocene global climate evolution. Deciphering the timing of change of these key climate parameters with respect to the insolation forcing is central to understanding the processes controlling glacial terminations. Here we exploit the sensitivity of the Paleo Tiber River (central Italy) to sea-level forced changes in the base level and the frequent occurrence of datable tephra layers in its sedimentary successions to reconstruct the timing of the relative sea-level (RSL) change between 450 and 403 ka, i.e., across the glacial termination (T-V) that marks the transition between Marine Isotope Stage (MIS) 12 and MIS 11. The analysis hinges on new stratigraphic data, tephra geochemical fingerprinting, and 40Ar/39Ar dating from a fluvial section that represents the inland counterpart of the near mouth, coastal aggradational succes- sions of the San Paolo Formation (SPF). Tephra correlation indicates that the morpho-stratigraphic record of the inland section is as sensitive to the sea-level change as its coastal counterparts, which makes it ideal to complement previous RSL reconstructions from the Tiber River catchment basin, thereby providing a more detailed picture of the sea-level history across T-V. Combined sedimentological and morphological proxies of the composed inland-coastal SPF record document the occurrence of two phases of relatively rapid sea-level rise, here interpreted as meltwater pulse (MWP) events. The earlier MWP occurred between ~450 and ~445 ka and matches a relatively minor episode of the sea-level rise documented in an existing RSL record, while the younger MWP at ~430 ka corresponds to the high amplitude sea-level rise that marks T-V. We find that both MWPs coincide with episodes of ice-rafted debris deposition in the North Atlantic (Heinrich-like events) and with attendant Southern Hemi- sphere warming, plausibly associated with the bipolar seesaw. Published 106976 5A. Ricerche polari e ... Article in Journal/Newspaper North Atlantic Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Tiber ENVELOPE(-66.983,-66.983,-68.392,-68.392) Quaternary Science Reviews 263 106976 |
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Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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ftingv |
language |
English |
description |
Glacial-interglacial variations in ice volume and sea level are essential components of the Pleistocene global climate evolution. Deciphering the timing of change of these key climate parameters with respect to the insolation forcing is central to understanding the processes controlling glacial terminations. Here we exploit the sensitivity of the Paleo Tiber River (central Italy) to sea-level forced changes in the base level and the frequent occurrence of datable tephra layers in its sedimentary successions to reconstruct the timing of the relative sea-level (RSL) change between 450 and 403 ka, i.e., across the glacial termination (T-V) that marks the transition between Marine Isotope Stage (MIS) 12 and MIS 11. The analysis hinges on new stratigraphic data, tephra geochemical fingerprinting, and 40Ar/39Ar dating from a fluvial section that represents the inland counterpart of the near mouth, coastal aggradational succes- sions of the San Paolo Formation (SPF). Tephra correlation indicates that the morpho-stratigraphic record of the inland section is as sensitive to the sea-level change as its coastal counterparts, which makes it ideal to complement previous RSL reconstructions from the Tiber River catchment basin, thereby providing a more detailed picture of the sea-level history across T-V. Combined sedimentological and morphological proxies of the composed inland-coastal SPF record document the occurrence of two phases of relatively rapid sea-level rise, here interpreted as meltwater pulse (MWP) events. The earlier MWP occurred between ~450 and ~445 ka and matches a relatively minor episode of the sea-level rise documented in an existing RSL record, while the younger MWP at ~430 ka corresponds to the high amplitude sea-level rise that marks T-V. We find that both MWPs coincide with episodes of ice-rafted debris deposition in the North Atlantic (Heinrich-like events) and with attendant Southern Hemi- sphere warming, plausibly associated with the bipolar seesaw. Published 106976 5A. Ricerche polari e ... |
author2 |
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# |
format |
Article in Journal/Newspaper |
author |
Giaccio, Biagio Marino, Gianluca Marra, Fabrizio Monaco, Lorenzo Pereira, Alison Zanchetta, Giovanni Gaeta, Mario Leicher, Niklas Nomade, Sebastien Palladino, Danilo Mauro Sottili, Gianluca Guillou, Hervé Scao, Vincent |
spellingShingle |
Giaccio, Biagio Marino, Gianluca Marra, Fabrizio Monaco, Lorenzo Pereira, Alison Zanchetta, Giovanni Gaeta, Mario Leicher, Niklas Nomade, Sebastien Palladino, Danilo Mauro Sottili, Gianluca Guillou, Hervé Scao, Vincent Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
author_facet |
Giaccio, Biagio Marino, Gianluca Marra, Fabrizio Monaco, Lorenzo Pereira, Alison Zanchetta, Giovanni Gaeta, Mario Leicher, Niklas Nomade, Sebastien Palladino, Danilo Mauro Sottili, Gianluca Guillou, Hervé Scao, Vincent |
author_sort |
Giaccio, Biagio |
title |
Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
title_short |
Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
title_full |
Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
title_fullStr |
Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
title_full_unstemmed |
Tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination V |
title_sort |
tephrochronological constraints on the timing and nature of sea-level change prior to and during glacial termination v |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://hdl.handle.net/2122/15500 https://doi.org/10.1016/j.quascirev.2021.106976 |
long_lat |
ENVELOPE(-66.983,-66.983,-68.392,-68.392) |
geographic |
Tiber |
geographic_facet |
Tiber |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Quaternary Science Reviews /263 (2021) 0277-3791 http://hdl.handle.net/2122/15500 doi:10.1016/j.quascirev.2021.106976 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.106976 |
container_title |
Quaternary Science Reviews |
container_volume |
263 |
container_start_page |
106976 |
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1766135843576086528 |