Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice

International audience How fast and how much climate can change has significant implications for concerns about future climate changes and their potential impacts on society. An abrupt climate change 8200 years ago (8.2 ka event) provides a test case to understand possible future climatic variabilit...

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Published in:Quaternary Science Reviews
Main Authors: Kobashi, Takuro, P. Severinghaus, Jeffrey, J. Brook, Edward, Barnola, Jean-Marc, M. Grachev, Alexi
Other Authors: Scripps Institution of Oceanography (SIO - UC San Diego), University of California San Diego (UC San Diego), University of California (UC)-University of California (UC), Department of Geosciences, Oregon State University (OSU), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2007
Subjects:
Online Access:https://insu.hal.science/insu-00376342
https://doi.org/10.1016/j.quascirev.2007.01.009
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spelling ftunigrenoble:oai:HAL:insu-00376342v1 2024-05-12T08:04:25+00:00 Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice Kobashi, Takuro P. Severinghaus, Jeffrey J. Brook, Edward Barnola, Jean-Marc M. Grachev, Alexi Scripps Institution of Oceanography (SIO - UC San Diego) University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) Department of Geosciences Oregon State University (OSU) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2007 https://insu.hal.science/insu-00376342 https://doi.org/10.1016/j.quascirev.2007.01.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2007.01.009 insu-00376342 https://insu.hal.science/insu-00376342 doi:10.1016/j.quascirev.2007.01.009 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://insu.hal.science/insu-00376342 Quaternary Science Reviews, 2007, 26 (9-10), pp.1212 à 1222. ⟨10.1016/j.quascirev.2007.01.009⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2007 ftunigrenoble https://doi.org/10.1016/j.quascirev.2007.01.009 2024-04-18T03:02:45Z International audience How fast and how much climate can change has significant implications for concerns about future climate changes and their potential impacts on society. An abrupt climate change 8200 years ago (8.2 ka event) provides a test case to understand possible future climatic variability. Here, methane concentration (taken as an indicator for terrestrial hydrology) and nitrogen isotopes (Greenland temperature) in trapped air in a Greenland ice core (GISP2) are employed to scrutinize the evolution of the 8.2 ka event. The synchronous change in methane and nitrogen implies that the 8.2 ka event was a synchronous event (within ±4 years) at a hemispheric scale, as indicated by recent climate model results [Legrande, A. N., Schmidt, G. A., Shindell, D. T., Field, C. V., Miller, R. L., Koch, D. M., Faluvegi, G., Hoffmann, G., 2006. Consistent simulations of multiple proxy responses to an abrupt climate change event. Proceedings of the National Academy of Sciences 103, 837–842]. The event began with a large-scale general cooling and drying around 8175±30 years BP (Before Present, where Present is 1950 AD). Greenland temperature cooled by 3.3±1.1 °C (decadal average) in less than 20 years, and atmospheric methane concentration decreased by 80±25 ppb over 40 years, corresponding to a 15±5% emission reduction. Hemispheric scale cooling and drying, inferred from many paleoclimate proxies, likely contributed to this emission reduction. In central Greenland, the coldest period lasted for 60 years, interrupted by a milder interval of a few decades, and temperature subsequently warmed in several steps over 70 years. The total duration of the 8.2 ka event was roughly 150 years. Article in Journal/Newspaper Greenland Greenland ice core ice core Université Grenoble Alpes: HAL Greenland Quaternary Science Reviews 26 9-10 1212 1222
institution Open Polar
collection Université Grenoble Alpes: HAL
op_collection_id ftunigrenoble
language English
topic [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
spellingShingle [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Kobashi, Takuro
P. Severinghaus, Jeffrey
J. Brook, Edward
Barnola, Jean-Marc
M. Grachev, Alexi
Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
topic_facet [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
description International audience How fast and how much climate can change has significant implications for concerns about future climate changes and their potential impacts on society. An abrupt climate change 8200 years ago (8.2 ka event) provides a test case to understand possible future climatic variability. Here, methane concentration (taken as an indicator for terrestrial hydrology) and nitrogen isotopes (Greenland temperature) in trapped air in a Greenland ice core (GISP2) are employed to scrutinize the evolution of the 8.2 ka event. The synchronous change in methane and nitrogen implies that the 8.2 ka event was a synchronous event (within ±4 years) at a hemispheric scale, as indicated by recent climate model results [Legrande, A. N., Schmidt, G. A., Shindell, D. T., Field, C. V., Miller, R. L., Koch, D. M., Faluvegi, G., Hoffmann, G., 2006. Consistent simulations of multiple proxy responses to an abrupt climate change event. Proceedings of the National Academy of Sciences 103, 837–842]. The event began with a large-scale general cooling and drying around 8175±30 years BP (Before Present, where Present is 1950 AD). Greenland temperature cooled by 3.3±1.1 °C (decadal average) in less than 20 years, and atmospheric methane concentration decreased by 80±25 ppb over 40 years, corresponding to a 15±5% emission reduction. Hemispheric scale cooling and drying, inferred from many paleoclimate proxies, likely contributed to this emission reduction. In central Greenland, the coldest period lasted for 60 years, interrupted by a milder interval of a few decades, and temperature subsequently warmed in several steps over 70 years. The total duration of the 8.2 ka event was roughly 150 years.
author2 Scripps Institution of Oceanography (SIO - UC San Diego)
University of California San Diego (UC San Diego)
University of California (UC)-University of California (UC)
Department of Geosciences
Oregon State University (OSU)
Laboratoire de glaciologie et géophysique de l'environnement (LGGE)
Observatoire des Sciences de l'Univers de Grenoble (OSUG)
Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
format Article in Journal/Newspaper
author Kobashi, Takuro
P. Severinghaus, Jeffrey
J. Brook, Edward
Barnola, Jean-Marc
M. Grachev, Alexi
author_facet Kobashi, Takuro
P. Severinghaus, Jeffrey
J. Brook, Edward
Barnola, Jean-Marc
M. Grachev, Alexi
author_sort Kobashi, Takuro
title Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
title_short Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
title_full Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
title_fullStr Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
title_full_unstemmed Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
title_sort precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice
publisher HAL CCSD
publishDate 2007
url https://insu.hal.science/insu-00376342
https://doi.org/10.1016/j.quascirev.2007.01.009
geographic Greenland
geographic_facet Greenland
genre Greenland
Greenland ice core
ice core
genre_facet Greenland
Greenland ice core
ice core
op_source ISSN: 0277-3791
EISSN: 1873-457X
Quaternary Science Reviews
https://insu.hal.science/insu-00376342
Quaternary Science Reviews, 2007, 26 (9-10), pp.1212 à 1222. ⟨10.1016/j.quascirev.2007.01.009⟩
op_relation info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2007.01.009
insu-00376342
https://insu.hal.science/insu-00376342
doi:10.1016/j.quascirev.2007.01.009
op_doi https://doi.org/10.1016/j.quascirev.2007.01.009
container_title Quaternary Science Reviews
container_volume 26
container_issue 9-10
container_start_page 1212
op_container_end_page 1222
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