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

Proceedings of the National Academy of Sciences of the United States of America
Claire C TreatVictor Brovkin

Abstract

Glacial-interglacial variations in CO2 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 predo...Continue Reading

References

May 16, 2008·Nature·Laetitia LoulergueJérôme Chappellaz
Apr 7, 2010·Proceedings of the National Academy of Sciences of the United States of America·Miriam C Jones, Zicheng Yu
Jul 3, 2010·Nature·Daniel M SigmanGerald H Haug
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May 1, 1991·Ecological Applications : a Publication of the Ecological Society of America·Eville Gorham
Jan 13, 2017·Nature·Greta C DargieSuspense A Ifo
Apr 19, 2018·Proceedings of the National Academy of Sciences of the United States of America·Paul J MorrisKaren L Bacon

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Citations

May 2, 2019·Nature·Merritt R TuretskyA Britta K Sannel
Aug 12, 2020·Proceedings of the National Academy of Sciences of the United States of America·Gustaf HugeliusZicheng Yu
Oct 19, 2020·Global Change Biology·Kelly RibeiroJean P Ometto
Dec 7, 2021·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Ruth K VarnerMichael W Palace

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Software Mentioned

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