Climatic controls on the dynamic lateral expansion of northern peatlands and its potential implication for the 'anomalous' atmospheric CH 4 rise since the mid-Holocene.
| Autor: | Peng H; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550081 Guiyang, China; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden. Electronic address: penghaijun@mail.gyig.ac.cn., Nijp JJ; KWR Water Research Institute, Ecohydrology Group, Nieuwegein, the Netherlands; Wageningen University, Soil Physics and Land Management Group, Wageningen, the Netherlands., Ratcliffe JL; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden., Li C; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden., Hong B; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550081 Guiyang, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China., Lidberg W; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden., Zeng M; College of Geography and Environmental Sciences, Zhejiang Normal University, 321004 Jinhua, China., Mauquoy D; School Geosciences, University of Aberdeen, AB24 3UF, Scotland, UK., Bishop K; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, 75007 Uppsala 12, Sweden., Nilsson MB; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden. |
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| Jazyk: | angličtina |
| Zdroj: | The Science of the total environment [Sci Total Environ] 2024 Jan 15; Vol. 908, pp. 168450. Date of Electronic Publication: 2023 Nov 13. |
| DOI: | 10.1016/j.scitotenv.2023.168450 |
| Abstrakt: | Understanding the dynamic changes in peatland area during the Holocene is essential for unraveling the connections between northern peatland development and global carbon budgets. However, studies investigating the centennial to millennial-scale process of peatland expansion and its climate and environmental drivers are still limited. In this study, we present a reconstruction of the peatland area and lateral peatland expansion rate of a peatland complex in northern Sweden since the mid-Holocene, based on Ground Penetrating Radar measurements of peat thickness supported by radiocarbon ( 14 C) dates from four peat cores. Based on this analysis, lateral expansion of the peatland followed a northwest-southeast directionality, constrained by the undulating post-glacial topography. The areal extent of peat has increased non-linearly since the mid-Holocene, and the peatland lateral expansion rate has generally been on the rise, with intensified expansion occurring after around 3500 cal yr BP. Abrupt declines in lateral expansion rates were synchronized with the decreases in total solar irradiance superimposed on the millennial ice-rafted debris events in the northern high latitudes. Supported by the temporal evolution of peatland extent in four other Fennoscandian peatlands, it appears that the northern peatland areal extent during the early to middle Holocene was much smaller compared to previous empirical model reconstructions based on basal age compilations. Interestingly, our reconstruction shows the increments of peat area since the mid-Holocene coincide with the rise in atmospheric CH Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2023 Elsevier B.V. All rights reserved.) |
| Databáze: | MEDLINE |
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