The regional imprints of Dansgaard-Oeschger events on land and marine environments
One of the most important challenges of the IPCC is documenting the regional impact of the present-day global warming. Yet, identifying the regional expression of global changes is the first and necessary step to understand the mechanisms behind them. The best examples of past global warming events,...
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ftccsdartic:oai:HAL:hal-04234973v1 2023-11-12T04:16:22+01:00 The regional imprints of Dansgaard-Oeschger events on land and marine environments Sánchez Goñi, María, F Fourcade, Tiffanie Zorzi, Coralie Urrego, Dunia Weitzel, Nils École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Archéosciences Bordeaux Université de Bordeaux (UB)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS) College of Life and Environmental Sciences Exeter University of Exeter Institut für Umweltphysik Heidelberg Universität Heidelberg Heidelberg = Heidelberg University Rome, Italy 2023-07-14 https://hal.science/hal-04234973 en eng HAL CCSD hal-04234973 https://hal.science/hal-04234973 XXI INQUA Congress https://hal.science/hal-04234973 XXI INQUA Congress, Jul 2023, Rome, Italy [SDE]Environmental Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/conferenceObject Conference papers 2023 ftccsdartic 2023-10-14T22:30:57Z One of the most important challenges of the IPCC is documenting the regional impact of the present-day global warming. Yet, identifying the regional expression of global changes is the first and necessary step to understand the mechanisms behind them. The best examples of past global warming events, comparable in velocity and magnitude to those expected in the 21st-century, are those associated with the Dansgaard–Oeschger (D–O) cycles that punctuated the last glacial period, ~115,000-27,000 years ago (115-27 ka). Reasonably well-chronologically constrained deep-sea and terrestrial records of D-O cycles provide an excellent opportunity for documenting the nature (shape, amplitude, timing and duration) of the vegetation, fire and oceanic regional responses to past rapid global warming events. Building on the ACER (https://doi.org/10.1594/PANGAEA.870867) and PaleoJump (https://www.tipes.dk/paleojump-a-tipes-database-for-research-on-rapid-climate-transitions/) databases, I will present a new compilation of D-O records from geochemical, sedimentological and micropaleontological data. I will pay particular attention to one of the best dated event, the D-O 8, centered at ~38,000 years ago (38 ka). It followed the Heinrich Stadial 4 cold phase (~40 -38 years ago), and occurred during a period of minima in precession and intermediate ice volume (Marine Isotope Stage 3). Compared to the other D-O events, D-O 8 was marked by strong Greenland warming, ~10°C, and strong increase in atmospheric CH4 and CO2 concentrations, by at around 150 ppb and 20 ppm, respectively, and was associated with a vigorous resumption of the Atlantic Meridional Overturning Circulation. D-O 8 warming has also the advantage to be relatively recent and, therefore, one of the best recorded all around the world. Conference Object Dansgaard-Oeschger events Greenland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
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[SDE]Environmental Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Sánchez Goñi, María, F Fourcade, Tiffanie Zorzi, Coralie Urrego, Dunia Weitzel, Nils The regional imprints of Dansgaard-Oeschger events on land and marine environments |
topic_facet |
[SDE]Environmental Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
One of the most important challenges of the IPCC is documenting the regional impact of the present-day global warming. Yet, identifying the regional expression of global changes is the first and necessary step to understand the mechanisms behind them. The best examples of past global warming events, comparable in velocity and magnitude to those expected in the 21st-century, are those associated with the Dansgaard–Oeschger (D–O) cycles that punctuated the last glacial period, ~115,000-27,000 years ago (115-27 ka). Reasonably well-chronologically constrained deep-sea and terrestrial records of D-O cycles provide an excellent opportunity for documenting the nature (shape, amplitude, timing and duration) of the vegetation, fire and oceanic regional responses to past rapid global warming events. Building on the ACER (https://doi.org/10.1594/PANGAEA.870867) and PaleoJump (https://www.tipes.dk/paleojump-a-tipes-database-for-research-on-rapid-climate-transitions/) databases, I will present a new compilation of D-O records from geochemical, sedimentological and micropaleontological data. I will pay particular attention to one of the best dated event, the D-O 8, centered at ~38,000 years ago (38 ka). It followed the Heinrich Stadial 4 cold phase (~40 -38 years ago), and occurred during a period of minima in precession and intermediate ice volume (Marine Isotope Stage 3). Compared to the other D-O events, D-O 8 was marked by strong Greenland warming, ~10°C, and strong increase in atmospheric CH4 and CO2 concentrations, by at around 150 ppb and 20 ppm, respectively, and was associated with a vigorous resumption of the Atlantic Meridional Overturning Circulation. D-O 8 warming has also the advantage to be relatively recent and, therefore, one of the best recorded all around the world. |
author2 |
École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Archéosciences Bordeaux Université de Bordeaux (UB)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS) College of Life and Environmental Sciences Exeter University of Exeter Institut für Umweltphysik Heidelberg Universität Heidelberg Heidelberg = Heidelberg University |
format |
Conference Object |
author |
Sánchez Goñi, María, F Fourcade, Tiffanie Zorzi, Coralie Urrego, Dunia Weitzel, Nils |
author_facet |
Sánchez Goñi, María, F Fourcade, Tiffanie Zorzi, Coralie Urrego, Dunia Weitzel, Nils |
author_sort |
Sánchez Goñi, María, F |
title |
The regional imprints of Dansgaard-Oeschger events on land and marine environments |
title_short |
The regional imprints of Dansgaard-Oeschger events on land and marine environments |
title_full |
The regional imprints of Dansgaard-Oeschger events on land and marine environments |
title_fullStr |
The regional imprints of Dansgaard-Oeschger events on land and marine environments |
title_full_unstemmed |
The regional imprints of Dansgaard-Oeschger events on land and marine environments |
title_sort |
regional imprints of dansgaard-oeschger events on land and marine environments |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04234973 |
op_coverage |
Rome, Italy |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland |
genre_facet |
Dansgaard-Oeschger events Greenland |
op_source |
XXI INQUA Congress https://hal.science/hal-04234973 XXI INQUA Congress, Jul 2023, Rome, Italy |
op_relation |
hal-04234973 https://hal.science/hal-04234973 |
_version_ |
1782333475226910720 |