气候变化领域集成服务门户(CCPortal): Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming

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DOI	10.1016/j.epsl.2021.116970
	Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming
	Denis E.H.; Maibauer B.J.; Bowen G.J.; Jardine P.E.; Harrington G.J.; Baczynski A.A.; McInerney F.A.; Collinson M.E.; Belcher C.M.; Wing S.L.; Freeman K.H.
发表日期	2021
ISSN	0012821X
卷号	566
英文摘要	Global warming will likely perturb carbon storage and cycling throughout many components of the exogenic carbon cycle, but its net impact on the long-term fate of organic carbon stabilized in soils is unclear. Abrupt warming during the Paleocene-Eocene Thermal Maximum (PETM) profoundly altered vegetation and hydrologic patterns globally. To assess the consequences for soil carbon in a mid-latitude region we measured total organic carbon (%TOC), polycyclic aromatic hydrocarbons (PAHs), charcoal, and sporomorphs (pollen and spores) at two paleo-floodplain depositional sites in the Bighorn Basin, Wyoming, USA. At both sites %TOC, PAHs, charcoal, and sporomorphs declined during the PETM. The decline in pyrogenic carbon, which is more severe than the decline in %TOC, is consistent with isotopic and fossil evidence for degradation of labile organic compounds and preservation of highly refractory allochthonous organic carbon. The severe loss of less-labile contemporaneous PETM (autochthonous) soil carbon, illustrated by the fate of pyrogenic carbon, indicates intensified rates of organic matter decay during the PETM. Because of the highly degraded signature of organic matter in these PETM sections, it is difficult to discern if less pyrogenic carbon is in part a consequence of less fire occurrence during the PETM. We propose that in this mid-latitude region of the western USA increased soil carbon oxidation hindered soil carbon sequestration during this period of hotter climate with more seasonal precipitation. © 2021 Elsevier B.V.
关键词	climate organic carbon Paleocene-Eocene Thermal Maximum (PETM)polycyclic aromatic hydrocarbon (PAH)preservation soil
英文关键词	Biogeochemistry; Biological materials; Charcoal; Decay (organic); Forestry; Global warming; Mineral oils; Organic carbon; Polycyclic aromatic hydrocarbons; Bighorn basins; Climate; Midlatitudes; Organics; Paleocene-eocene thermal maximum; Paleocene-eocene thermal maximums; Polycyclic aromatic hydrocarbon; Preservation; Soil carbon; Wyoming; Soils; carbon cycle; carbon storage; depositional environment; organic carbon; oxidation; PAH; Paleocene-Eocene boundary; paleoclimate; paleotemperature; preservation; soil carbon; total organic carbon; warming; Bighorn Basin; United States; Wyoming
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203069
作者单位	Department of Geosciences, Pennsylvania State University, University Park, PA 16802, United States; Department of Geology & Geophysics, University of Utah, Salt Lake City, UT 84112, United States; Department of Environment, Earth & Ecosystems, Open University, Milton Keynes, MK7 6AA, United Kingdom; School of Geography, Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; Institute of Geology & Palaeontology, University of Münster, Münster, 48149, Germany; Department of Earth Sciences, Sprigg Geobiology Centre, University of Adelaide, Adelaide, SA 5005, Australia; Department of Earth Sciences, Royal Holloway University of London, Egham, TW20 0EX, United Kingdom; Department of Geography, University of Exeter, Exeter, EX4 4PS, United Kingdom; Department of Paleobiology, Smithsonian Institution, Washington, DC 20013, United States
推荐引用方式 GB/T 7714	Denis E.H.,Maibauer B.J.,Bowen G.J.,et al. Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming[J],2021,566.
APA	Denis E.H..,Maibauer B.J..,Bowen G.J..,Jardine P.E..,Harrington G.J..,...&Freeman K.H..(2021).Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming.Earth and Planetary Science Letters,566.
MLA	Denis E.H.,et al."Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming".Earth and Planetary Science Letters 566(2021).