globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo1832
论文题名:
The acceleration of oceanic denitrification during deglacial warming
作者: Galbraith E.D.; Kienast M.; Albuquerque A.L.; Altabet M.A.; Batista F.; Bianchi D.; Calvert S.E.; Contreras S.; Crosta X.; De Pol-Holz R.; Dubois N.; Etourneau J.; Francois R.; Hsu T.-C.; Ivanochko T.; Jaccard S.L.; Kao S.-J.; Kiefer T.; Kienast S.; Lehmann M.F.; Martinez P.; McCarthy M.; Meckler A.N.; Mix A.; Möbius J.; Pedersen T.F.; Pichevin L.; Quan T.M.; Robinson R.S.; Ryabenko E.; Schmittner A.; Schneider R.; Schneider-Mor A.; Shigemitsu M.; Sinclair D.; Somes C.; Studer A.S.; Tesdal J.-E.; Thunell R.; Terence Yang J.-Y.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期:7
起始页码: 579
结束页码: 584
语种: 英语
Scopus关键词: acceleration ; bioavailability ; biological production ; continental shelf ; deglaciation ; denitrification ; growth rate ; Holocene ; last deglaciation ; Last Glacial Maximum ; nitrogen cycle ; sea surface ; seafloor ; sedimentary sequence
英文摘要: Over much of the ocean's surface, productivity and growth are limited by a scarcity of bioavailable nitrogen. Sedimentary δ 15 N records spanning the last deglaciation suggest marked shifts in the nitrogen cycle during this time, but the quantification of these changes has been hindered by the complexity of nitrogen isotope cycling. Here we present a database of δ 15 N in sediments throughout the world's oceans, including 2,329 modern seafloor samples, and 76 timeseries spanning the past 30,000 years. We show that the δ 15 N values of modern seafloor sediments are consistent with values predicted by our knowledge of nitrogen cycling in the water column. Despite many local deglacial changes, the globally averaged δ 15 N values of sinking organic matter were similar during the Last Glacial Maximum and Early Holocene. Considering the global isotopic mass balance, we explain these observations with the following deglacial history of nitrogen inventory processes. During the Last Glacial Maximum, the nitrogen cycle was near steady state. During the deglaciation, denitrification in the pelagic water column accelerated. The flooding of continental shelves subsequently increased denitrification at the seafloor, and denitrification reached near steady-state conditions again in the Early Holocene. We use a recent parameterization of seafloor denitrification to estimate a 30-120% increase in benthic denitrification between 15,000 and 8,000 years ago. Based on the similarity of globally averaged δ 15 N values during the Last Glacial Maximum and Early Holocene, we infer that pelagic denitrification must have increased by a similar amount between the two steady states. © 2013 Macmillan Publishers Limited. 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/106752
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Earth and Planetary Science, McGill University, 3450 University Street, Montreal, QC H3A 2A7, Canada; Department of Oceanography, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, Canada; Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense, Rio de Janeiro 24.020-015, Brazil; School for Marine Science and Technology, U Massachusetts Dartmouth, 706 Rodney French Blvd, New Bedford, MA 02744-1221, United States; Ocean Sciences Deptartment, University of California, Santa Cruz 95064, United States; Department of Earth Ocean and Atmospheric Sciences, University of British Columbia, 2020-2207 Main Mall, BC, V6T 1Z4, Canada; Large Lakes Observatory, University of Minnesota Duluth, Research Laboratory Building 205, 2205 E. 5th Street, Duluth, MN 55812, United States; Université Bordeaux 1, UMR CNRS 5805 EPOC, Avenue des facultés, 33405 Talence cedex, France; Department of Oceanography, Center for Climate and Resilience Research (CR), Universidad de Concepción, Casilla 160-C, Concepcion 4070386, Chile; Woods Hole Oceanographic Institution, MS No23, Clark 120A, Woods Hole, MA 02543, United States; UMR 7159 LOCEAN, Université Pierre et Marie Curie, Institut Pierre Simon Laplace, 4 Place Jussieu Boite 100, 75252 Paris Cedex 05, France; Research Center for Environmental Changes, Academia Sinica, 128 Academia Road, Sec. 2, Nankang Taipei 115, Taiwan; Geological Institute, ETH Zurich, Sonneggstrasse 5, CH-8092 Zurich, Switzerland; Research Center for Environmental Changes, Academia Sinica, Taipei 115, Taiwan; PAGES International Project Office, Zähringerstrasse 25, 3012 Bern, Switzerland; Department of Environmental Sciences, University of Basel, Bernoullistrasse 30, CH-4056 Basel, Switzerland; College of Earth Oceanic, and Atmospheric Sciences, Oregon State University, CEOAS Administration Building 104, Corvallis, OR 97331-5503, United States; Institute for Biogeochemistry and Marine Chemistry, Hamburg University, Bundesstrasse 55, 20146 Hamburg, Germany; Pacific Institute for Climate Solutions, University of Victoria, PO Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada; School of Geosciences, University of Edinburgh, West Mains Road, Edinburgh EH9 3JW, United Kingdom; Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Stillwater, OK 74074, United States; Graduate School of Oceanography, University of Rhode Island, Narragansett Bay Campus, Narragansett, RI 02882, United States; GEOMAR Helmholtz-Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany; Institut fuer Geowissenschaften, Christian-Albrechts-Universitaet zu Kiel, Ludewig-Meyn-Str. 10, 24118 Kiel, Germany; Department of Geological and Environmental Sciences, Stanford University, 367 Panama Street, Stanford, CA 94305, United States; Faculty of Environmental Earth Science, Hokkaido University, Sapporo 0600810, Japan; Institute of Marine and Coastal Sciences, Rutgers University, Newark, 71 Dudley Road, New Brunswick, NJ 08901-8525, United States; School of Earth and Ocean Sciences, University of Victoria, Station CSC, 3800 Finnerty Road (Ring Road), Victoria, BC V8W 2Y2, Canada; Department of Earth and Ocean Sciences, University of South Carolina, Columbia, SC 29208, United States; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China

Recommended Citation:
Galbraith E.D.,Kienast M.,Albuquerque A.L.,et al. The acceleration of oceanic denitrification during deglacial warming[J]. Nature Geoscience,2013-01-01,6(7)
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