On the origin and timing of rapid changes in atmospheric methane during the Last Glacial Period
Reads0
Chats0
TLDR
In this article, the authors present high resolution records of atmospheric methane from the GISP2 (Greenland Ice Sheet Project 2) ice core for four rapid climate transitions that occurred during the past 50 ka.Abstract:
We present high resolution records of atmospheric methane from the GISP2 (Greenland Ice Sheet Project 2) ice core for four rapid climate transitions that occurred during the past 50 ka: the end of the Younger Dryas at 11.8 ka, the beginning of the Bolling-Allerod period at 14.8 ka, the beginning of interstadial 8 at 38.2 ka, and the beginning of interstadial 12 at 45.5 ka. During these events, atmospheric methane concentrations increased by 200–300 ppb over time periods of 100–300 years, significantly more slowly than associated temperature and snow accumulation changes recorded in the ice core record. We suggest that the slower rise in methane concentration may reflect the timescale of terrestrial ecosystem response to rapid climate change. We find no evidence for rapid, massive methane emissions that might be associated with large-scale decomposition of methane hydrates in sediments. With additional results from the Taylor Dome Ice Core (Antarctica) we also reconstruct changes in the interpolar methane gradient (an indicator of the geographical distribution of methane sources) associated with some of the rapid changes in atmospheric methane. The results indicate that the rise in methane at the beginning of the Bolling-Allerod period and the later rise at the end of the Younger Dryas were driven by increases in both tropical and boreal methane sources. During the Younger Dryas (a 1.3 ka cold period during the last deglaciation) the relative contribution from boreal sources was reduced relative to the early and middle Holocene periods.read more
Citations
More filters
Journal Article
Couplings between changes in the climate system and biogeochemistry
Surabi Menon,Kenneth L. Denman,Guy Brasseur,Amnat Chidthaisong,Philippe Ciais,Peter M. Cox,Robert E. Dickinson,Didier Hauglustaine,Christoph Heinze,Elisabeth A. Holland,Daniel J. Jacob,Ulrike Lohmann,S. Ramachandran,Pedro Leite da Silva Dias,Steven C. Wofsy,Xiaoye Zhang +15 more
TL;DR: Denman et al. as discussed by the authors presented the Couplings between changes in the climate system and biogeochemistry Coordinating Lead Authors: Kenneth L. Denman (Canada), Guy Brasseur (USA, Germany), Amnat Chidthaisong (Thailand), Philippe Ciais (France), Peter M. Cox (UK), Robert E. Austin (USA), D.B. Wofsy (USA) and Xiaoye Zhang (China).
Journal ArticleDOI
Mid- to Late Holocene climate change: an overview
Heinz Wanner,Jürg Beer,Jonathan Butikofer,Thomas J. Crowley,Ulrich Cubasch,Jacqueline Flückiger,Hugues Goosse,Martin Grosjean,Fortunat Joos,Jed O. Kaplan,Marcel Küttel,Simon A. Müller,I. Colin Prentice,Olga Solomina,Thomas F. Stocker,Pavel E. Tarasov,Mayke Wagner,Martin Widmann +17 more
TL;DR: The authors used selected proxy-based reconstructions of different climate variables, together with state-of-the-art time series of natural forcings (orbital variations, solar activity variations, large tropical volcanic eruptions, land cover and greenhouse gases), underpinned by results from GCMs and Earth System Models of Intermediate Complexity (EMICs), to establish a comprehensive explanatory framework for climate changes from the mid-Holocene (MH) to pre-industrial time.
Journal ArticleDOI
The Anthropogenic Greenhouse Era Began Thousands of Years Ago
TL;DR: The anthropogenic era is generally thought to have begun 150 to 200 years ago, when the industrial revolution began producing CO2 and CH4 at rates sufficient to alter their compositions in the atmosphere as discussed by the authors.
Journal ArticleDOI
Abrupt climate change
Richard B. Alley,Jochem Marotzke,William D. Nordhaus,Jonathan T. Overpeck,Dorothy M. Peteet,Roger A. Pielke,Raymond T. Pierrehumbert,Peter B. Rhines,Thomas F. Stocker,Lynne D. Talley,John M. Wallace +10 more
TL;DR: Policy-makers should consider expanding research into abrupt climate change, improving monitoring systems, and taking actions designed to enhance the adaptability and resilience of ecosystems and economies.
Journal ArticleDOI
Global peatland dynamics since the Last Glacial Maximum
TL;DR: This article presented a new data synthesis of global peatland ages, area changes, and carbon pool changes since the Last Glacial Maximum, along with a new map and total C pool estimates.
References
More filters
Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica
J. R. Petit,Jean Jouzel,Dominique Raynaud,J. M. Barnola,I. Basile,Michael L. Bender,Jérôme Chappellaz,Michael Davis,Gilles Delaygue,Marc Delmotte,V. M. Kotlyakov,Michel Legrand,Vladimir Ya. Lipenkov,C. Lorius,L. Pepin,Catherine Ritz,Eric S. Saltzman,Michel Stievenard +17 more
TL;DR: The recent completion of drilling at Vostok station in East Antarctica has allowed the extension of the ice record of atmospheric composition and climate to the past four glacial-interglacial cycles.
Journal ArticleDOI
Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica
J. R. Petit,Jean Jouzel,Dominique Raynaud,Nartsiss I. Barkov,I. Basile,Michael L. Bender,Jérôme Chappellaz,M. Davisk,G. Delaygue,Marc Delmotte,V. M. Kotlyakov,Michel Legrand,Vladimir Ya. Lipenkov,C. Lorius,Catherine Ritz,E. Saltzmank,Michel Stievenard +16 more
TL;DR: The recent completion of drilling at Vostok station in East Antarctica has allowed the extension of the ice record of atmospheric composition and climate to the past four glacial-interglacial cycles as discussed by the authors.
Book
Biogeochemistry : An Analysis of Global Change
TL;DR: In this paper, the authors present a perspective of the global cycle of nitrogen and phosphorous, the global water cycle, and the global sulfur cycle from a global point of view.
Journal ArticleDOI
Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores
Pieter Meiert Grootes,Minze Stuiver,James W. C. White,Sigfus J Johnsen,Sigfus J Johnsen,Jean Jouzel +5 more
TL;DR: In this article, the authors present the complete oxygen isotope record for the Greenland Ice Sheet Project 2 (GISP2) core, drilled 28 km west of the GRIP core, and observe large, rapid climate fluctuations throughout the last glacial period.
Journal ArticleDOI
Irregular glacial interstadials recorded in a new Greenland ice core
Sigfus J Johnsen,Sigfus J Johnsen,Henrik Clausen,Willi Dansgaard,K. Fuhrer,Niels S. Gundestrup,Claus U. Hammer,Peter Iversen,Jean Jouzel,Bernhard Stauffer,Jørgen Peder Steffensen +10 more
TL;DR: In this paper, the authors present results from a new deep ice core drilled at the summit of the Greenland ice sheet, where the depositional environ-ment and the flow pattern of the ice are close to ideal for core recovery and analysis.
Related Papers (5)
Timing of Millennial-Scale Climate Change in Antarctica and Greenland During the Last Glacial Period
Thomas Blunier,Edward J. Brook +1 more