globalchange  > 气候变化事实与影响
DOI: 10.1002/2014GB005007
Scopus记录号: 2-s2.0-84955202969
论文题名:
Carbon isotope ratios suggest no additional methane from boreal wetlands during the rapid Greenland Interstadial 21.2
作者: Sperlich P; , Schaefer H; , Mikaloff Fletcher S; E; , Guillevic M; , Lassey K; , Sapart C; J; , Röckmann T; , Blunier T
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:11
起始页码: 1962
结束页码: 1976
语种: 英语
英文关键词: boreal wetlands ; carbon isotopes ; ice cores ; methane ; precipitation ; tropical wetlands
Scopus关键词: Boreal Kingdom ; carbon isotope ratio ; ice core ; interstadial ; methane ; mixing ratio ; Northern Hemisphere ; permafrost ; precipitation (climatology) ; tropical region ; warming ; wetland ; Arctic ; Asia ; Greenland ; Greenland Ice Sheet ; South America ; Azadirachta indica
英文摘要: Samples from two Greenland ice cores (NEEM and NGRIP) have been measured for methane carbon isotope ratios (δ13C-CH4) to investigate the CH4 mixing ratio anomaly during Greenland Interstadial (GI) 21.2 (85,000 years before present). This extraordinarily rapid event occurred within 150 years, comprising a CH4 mixing ratio pulse of 150 ppb (∼25%). Our new measurements disclose a concomitant shift in δ13C-CH4 of 1‰. Keeling plot analyses reveal the δ13C of the additional CH4 source constituting the CH4 anomaly as -56.8 ± 2.8‰, which we confirm by means of a previously published box model. We propose tropical wetlands as the most probable additional CH4 source during GI-21.2 and present independent evidence that suggests that tropical wetlands in South America and Asia have played a key role. We find no evidence that boreal CH4 sources, such as permafrost degradation, contributed significantly to the atmospheric CH4 increase, despite the pronounced warming in the Northern Hemisphere during GI-21.2. © 2015. American Geophysical Union. 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/77908
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作者单位: Centre for Ice and Climate, University of Copenhagen, Copenhagen, Denmark; Max-Planck-Institute for Biogeochemistry, Jena, Germany; National Institute of Water and Atmospheric Research, Wellington, New Zealand; Laboratoire des Sciences du Climat et de l'Environnement, Gif sur Yvette, France; Now at Swiss Federal Institute of Metrology, Bern-Wabern, Switzerland; Lassey Research and Education Ltd, Lower Hutt, New Zealand; Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands; Now at Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium

Recommended Citation:
Sperlich P,, Schaefer H,, Mikaloff Fletcher S,et al. Carbon isotope ratios suggest no additional methane from boreal wetlands during the rapid Greenland Interstadial 21.2[J]. Global Biogeochemical Cycles,2015-01-01,29(11)
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