Widespread global peatland establishment and persistence over the last 130,000 y.

Autor: Treat CC; Department of Environmental and Biological Sciences, University of Eastern Finland, 70211 Kuopio, Finland; claire.treat@uef.fi.; Land in the Earth System, Max Planck Institute for Meteorology, 20146 Hamburg, Germany., Kleinen T; Land in the Earth System, Max Planck Institute for Meteorology, 20146 Hamburg, Germany., Broothaerts N; Department of Earth and Environmental Sciences, Division of Geography and Tourism, KU Leuven, B-3001 Leuven, Belgium., Dalton AS; Department of Earth Sciences, University of Toronto, Toronto, ON, M5S 3B1 Canada., Dommain R; Institute of Geosciences, University of Potsdam, 14476 Potsdam, Germany.; Department of Anthropology, Smithsonian Institution, National Museum of Natural History, Washington, DC 20560., Douglas TA; Biogeochemical Sciences Branch, US Army Cold Regions Research and Engineering Laboratory, Fort Wainwright, AK 99703., Drexler JZ; California Water Science Center, U.S. Geological Survey, Sacramento, CA 95819., Finkelstein SA; Department of Earth Sciences, University of Toronto, Toronto, ON, M5S 3B1 Canada., Grosse G; Institute of Geosciences, University of Potsdam, 14476 Potsdam, Germany.; Permafrost Research Section, Geosciences Department, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 14473 Potsdam, Germany., Hope G; College Asia and the Pacific, Australian National University, Canberra, ACT 2600, Australia., Hutchings J; Department of Geological Sciences, University of Florida, Gainesville, FL 32611., Jones MC; Eastern Geology and Paleoclimate Science Center, U.S. Geological Survey, Reston, VA 20192., Kuhry P; Department of Physical Geography, Stockholm University, 10691 Stockholm, Sweden., Lacourse T; Department of Biology, University of Victoria, Victoria, BC, V8W 2Y2 Canada., Lähteenoja O; School of Life Sciences, Arizona State University, Tempe, AZ 85287., Loisel J; Department of Geography, Texas A&M University, College Station, TX 77843., Notebaert B; Department of Earth and Environmental Sciences, Division of Geography and Tourism, KU Leuven, B-3001 Leuven, Belgium., Payne RJ; Environment and Geography, University of York, YO105DD York, United Kingdom.; Department of Zoology and Ecology, Penza State University, 440026 Penza, Russia., Peteet DM; Goddard Institute for Space Studies, NASA, New York, NY 10025., Sannel ABK; Department of Physical Geography, Stockholm University, 10691 Stockholm, Sweden., Stelling JM; Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA 18015., Strauss J; Permafrost Research Section, Geosciences Department, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 14473 Potsdam, Germany., Swindles GT; School of Geography, University of Leeds, LS2 9JT Leeds, United Kingdom., Talbot J; Department of Geography, University of Montreal, Montreal, QC, H2V 2B8 Canada., Tarnocai C; Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6 Canada., Verstraeten G; Department of Earth and Environmental Sciences, Division of Geography and Tourism, KU Leuven, B-3001 Leuven, Belgium., Williams CJ; Department of Earth and Environment, Franklin and Marshall College, Lancaster, PA 17603., Xia Z; Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA 18015., Yu Z; Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA 18015.; Institute for Peat and Mire Research, School of Geographical Sciences, Northeast Normal University, 130024 Changchun, China., Väliranta M; Environmental Change Research Unit, Ecosystems and Environment Research Programme, University of Helsinki, 00014 Helsinki, Finland., Hättestrand M; Department of Physical Geography, Stockholm University, 10691 Stockholm, Sweden., Alexanderson H; Department of Geology, Lund University, 223 62 Lund, Sweden., Brovkin V; Land in the Earth System, Max Planck Institute for Meteorology, 20146 Hamburg, Germany.
Jazyk: angličtina
Zdroj: Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2019 Mar 12; Vol. 116 (11), pp. 4822-4827. Date of Electronic Publication: 2019 Feb 25.
DOI: 10.1073/pnas.1813305116
Abstrakt: Glacial-interglacial variations in CO 2 and methane in polar ice cores have been attributed, in part, to changes in global wetland extent, but the wetland distribution before the Last Glacial Maximum (LGM, 21 ka to 18 ka) remains virtually unknown. We present a study of global peatland extent and carbon (C) stocks through the last glacial cycle (130 ka to present) using a newly compiled database of 1,063 detailed stratigraphic records of peat deposits buried by mineral sediments, as well as a global peatland model. Quantitative agreement between modeling and observations shows extensive peat accumulation before the LGM in northern latitudes (>40°N), particularly during warmer periods including the last interglacial (130 ka to 116 ka, MIS 5e) and the interstadial (57 ka to 29 ka, MIS 3). During cooling periods of glacial advance and permafrost formation, the burial of northern peatlands by glaciers and mineral sediments decreased active peatland extent, thickness, and modeled C stocks by 70 to 90% from warmer times. Tropical peatland extent and C stocks show little temporal variation throughout the study period. While the increased burial of northern peats was correlated with cooling periods, the burial of tropical peat was predominately driven by changes in sea level and regional hydrology. Peat burial by mineral sediments represents a mechanism for long-term terrestrial C storage in the Earth system. These results show that northern peatlands accumulate significant C stocks during warmer times, indicating their potential for C sequestration during the warming Anthropocene.
Competing Interests: The authors declare no conflict of interest.
(Copyright © 2019 the Author(s). Published by PNAS.)
Databáze: MEDLINE
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