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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Online Access: | https://insu.hal.science/insu-00376342 https://doi.org/10.1016/j.quascirev.2007.01.009 |
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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 |
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Open Polar |
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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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1798846612736311296 |