globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1908179116
论文题名:
Human and climate global-scale imprint on sediment transfer during the Holocene
作者: Jenny J.-P.; Koirala S.; Gregory-Eaves I.; Francus P.; Niemann C.; Ahrens B.; Brovkin V.; Baud A.; Ojala A.E.K.; Normandeau A.; Zolitschka B.; Carvalhais N.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:46
起始页码: 22972
结束页码: 22976
语种: 英语
英文关键词: 14C ages ; Global soil erosion ; Lake records ; Pollens ; Varved sediments
Scopus关键词: carbon 14 ; carbon ; aquatic environment ; Article ; climate change ; controlled study ; deforestation ; Holocene ; human ; land use ; priority journal ; sedimentation ; soil erosion ; watershed ; chemistry ; climate ; ecology ; ecosystem ; history ; human activities ; lake ; pollen ; sediment ; soil ; Carbon Isotopes ; Climate ; Ecology ; Ecosystem ; Geologic Sediments ; History, Ancient ; Human Activities ; Humans ; Lakes ; Pollen ; Soil
英文摘要: Accelerated soil erosion has become a pervasive feature on landscapes around the world and is recognized to have substantial implications for land productivity, downstream water quality, and biogeochemical cycles. However, the scarcity of global syntheses that consider long-term processes has limited our understanding of the timing, the amplitude, and the extent of soil erosion over millennial time scales. As such, we lack the ability to make predictions about the responses of soil erosion to long-term climate and land cover changes. Here, we reconstruct sedimentation rates for 632 lakes based on chronologies constrained by 3,980 calibrated 14C ages to assess the relative changes in lake-watershed erosion rates over the last 12,000 y. Estimated soil erosion dynamics were then complemented with land cover reconstructions inferred from 43,669 pollen samples and with climate time series from the Max Planck Institute Earth System Model. Our results show that a significant portion of the Earth surface shifted to human-driven soil erosion rate already 4,000 y ago. In particular, inferred soil erosion rates increased in 35% of the watersheds, and most of these sites showed a decrease in the proportion of arboreal pollen, which would be expected with land clearance. Further analysis revealed that land cover change was the main driver of inferred soil erosion in 70% of all studied watersheds. This study suggests that soil erosion has been altering terrestrial and aquatic ecosystems for millennia, leading to carbon (C) losses that could have ultimately induced feed-backs on the climate system. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163517
Appears in Collections:气候变化与战略

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作者单位: Jenny, J.-P., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany, Unité Mixte de Recherche (UMR42), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA), Université Savoie Mont Blanc, Chambéry, 73000, France; Koirala, S., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Gregory-Eaves, I., Department of Biology, McGill University, Montréal, QC H3A 1B1, Canada; Francus, P., Centre-EAU Terre Environnement, Institut National de la Recherche Scientifique (INRS)QC G1K 9A9, Canada, Centre de Recherche sur la Dynamique du Système Terre (GEOTOP), Université du Québec, Montréal, QC H3C 3P8, Canada; Niemann, C., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Ahrens, B., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Brovkin, V., Land in the Climate System Department, Max-Planck Institute for Meteorology, Hamburg, 20146, Germany; Baud, A., Department of Biology, McGill University, Montréal, QC H3A 1B1, Canada; Ojala, A.E.K., Geological Survey of Finland, Espoo, 02151, Finland; Normandeau, A., Geological Survey of Canada, Bedford Institute of Oceanography, Dartmouth, NS B2Y 4A2, Canada; Zolitschka, B., Geomorphology and Polar Research (GEOPOLAR), University of Bremen, Bremen, D-28359, Germany; Carvalhais, N., Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany, Departamento de Ciências e Engenharia do Ambiente (DCEA), Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa, Caparica, 2829-516, Portugal

Recommended Citation:
Jenny J.-P.,Koirala S.,Gregory-Eaves I.,et al. Human and climate global-scale imprint on sediment transfer during the Holocene[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(46)
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