globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2793
论文题名:
Permafrost carbon as a missing link to explain CO 2 changes during the last deglaciation
作者: Crichton K.A.; Bouttes N.; Roche D.M.; Chappellaz J.; Krinner G.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:9
起始页码: 683
结束页码: 686
语种: 英语
Scopus关键词: atmospheric chemistry ; Bolling ; carbon dioxide enrichment ; climate feedback ; freshwater input ; ice core ; last glaciation ; paleoclimate ; permafrost ; soil carbon ; thawing ; Younger Dryas ; Atlantic Ocean ; Atlantic Ocean (North)
英文摘要: The atmospheric concentration of CO 2 increased from 190 to 280 ppm between the last glacial maximum 21,000 years ago and the pre-industrial era. This CO 2 rise and its timing have been linked to changes in the Earth's orbit, ice sheet configuration and volume, and ocean carbon storage. The ice-core record of Í 13 CO 2 (refs,) in the atmosphere can help to constrain the source of carbon, but previous modelling studies have failed to capture the evolution of Í 13 CO 2 over this period. Here we show that simulations of the last deglaciation that include a permafrost carbon component can reproduce the ice core records between 21,000 and 10,000 years ago. We suggest that thawing permafrost, due to increasing summer insolation in the northern hemisphere, is the main source of CO 2 rise between 17,500 and 15,000 years ago, a period sometimes referred to as the Mystery Interval. Together with a fresh water release into the North Atlantic, much of the CO 2 variability associated with the Bølling-Allerod/Younger Dryas period â 1/415,000 to â 1/412,000 years ago can also be explained. In simulations of future warming we find that the permafrost carbon feedback increases global mean temperature by 10-40% relative to simulations without this feedback, with the magnitude of the increase dependent on the evolution of anthropogenic carbon emissions. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105928
Appears in Collections:气候减缓与适应
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作者单位: CNRS, LGGE (UMR5183), Grenoble, France; Univ. Grenoble Alpes, LGGE (UMR5183), Grenoble, France; UMR CNRS 5805 EPOC-OASU, Université de Bordeaux, Pessac Cedex, France; Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Cluster Earth and Climate, Department of Earth Sciences Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam de Boelelaan 1085, Amsterdam, Netherlands; School of Earth and Ocean Sciences, Cardi University, Park Place, Cardi, United Kingdom

Recommended Citation:
Crichton K.A.,Bouttes N.,Roche D.M.,et al. Permafrost carbon as a missing link to explain CO 2 changes during the last deglaciation[J]. Nature Geoscience,2016-01-01,9(9)
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