FN Archimer Export Format PT J TI Reviews and syntheses: The biogeochemical cycle of silicon in the modern ocean BT AF TREGUER, Paul SUTTON, Jill Brzezinski, Mark Charette, Matthew A. Devries, Timothy Dutkiewicz, Stephanie Ehlert, Claudia Hawkings, Jon LEYNAERT, Aude MEi Liu, Su LLOPIS MONFERRER, Natalia Lopez Acosta, Maria Maldonado, Manuel Rahman, Shaily Ran, Lihua ROUXEL, Olivier AS 1:1,2;2:1;3:3;4:4;5:5;6:6;7:7;8:8,9;9:1;10:10,11;11:1;12:12,13;13:13;14:14;15:15;16:16; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:PDG-REM-GM; C1 Univ Brest, CNRS, IRD, Ifremer, Institut Universitaire Européen de la Mer, LEMAR, Rue Dumont d'Urville, 29280, Plouzané, France State Key Laboratory of Satellite Ocean Dynamics (SOED), Ministry of Natural Resource, Hangzhou 310012, China Marine Science Institute, University of California, Santa Barbara, CA, USA Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA Department of Geography, University of California, Santa Barbara, California, USA Department of Earth, Atmospheric and Planetary Sciences (DEAPS), Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA Research Group for Marine Isotope Geochemistry, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von Ossietzky University Oldenburg, Germany National High Magnetic Field Lab and Earth, Ocean and Atmospheric Sciences, Florida State University, USA Interface Geochemistry, German Research Centre for Geosciences GFZ, Postdam, Germany Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Laboratory of Marine Chemistry Theory and Technology MOEy, Ocean University of China, Qingdao 266100, China Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China Institute of Marine Research (IIM-CSIC), Rúa de Eduardo Cabello 6, Vigo 36208, Pontevedra, Spain Department of Marine Ecology, Center for Advanced Studies of Blanes (CEAB-CSIC), Acceso Cala St. Francesc 14, Blanes 17300, Girona, Spain Department of Marine Science, University of Southern Mississippi, Stennis Space Center, MS 39529, USA Second Institute of Oceanography, Ministry of Natural Resources, P. R. China IFREMER, Centre de Brest, Technopôle Brest Iroise, Plouzané, France C2 UBO, FRANCE SOED, CHINA UNIV CALIF SANTA BARBARA, USA WHOI, USA UNIV CALIF SANTA BARBARA, USA MIT, USA UNIV OLDENBURG, GERMANY UNIV FLORIDA STATE, USA GFZ GERMAN RES CTR GEOSCI, GERMANY UNIV OCEAN CHINA, CHINA QNLM, CHINA IIM CSIC, SPAIN CEAB CSIC, SPAIN UNIV SOUTHERN MISSISSIPPI, USA SIO, CHINA IFREMER, FRANCE SI BREST SE PDG-REM-GM UM LEMAR IN WOS Ifremer UPR WOS Cotutelle UMR DOAJ copubli-france copubli-europe copubli-univ-france copubli-int-hors-europe copubli-sud IF 5.092 TC 107 UR https://archimer.ifremer.fr/doc/00643/75509/76356.pdf https://archimer.ifremer.fr/doc/00643/75509/76357.pdf https://archimer.ifremer.fr/doc/00643/75509/81797.pdf https://archimer.ifremer.fr/doc/00643/75509/81798.pdf LA English DT Article CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION AB he element silicon (Si) is required for the growth of silicified organisms in marine environments, such as diatoms, which consume vast amounts of Si together with N, P, and C, connecting the biogeochemical cycles of these elements. Thus, understanding the Si cycle in the ocean is critical for understanding issues such as carbon sequestration by the ocean's biological pump. In this review, we show that recent advances in process studies indicate that total Si inputs and outputs, to and from the world ocean, are 57 % and 18 % higher, respectively, than previous estimates. We also update the total ocean silicic acid inventory value, which is about 24 % higher than previously estimated. These changes are significant, modifying factors such as the geochemical residence time of Si, which is now about 8000 years and two times faster than previously assumed. In addition, we present an updated value of the global annual pelagic biogenic silica production (255 Tmol-Si yr−1) based on new data from 49 field studies and 18 model outputs, and provide a first estimate of the global annual benthic biogenic silica production due to sponges (6 Tmol-Si yr−1). Given these important modifications, we address the steady state hypothesis of the Si cycle for past and modern oceans, and propose a possible steady state scenario for the global ocean (inputs = outputs = 14.8 Tmol-Si yr−1) and boundary exchange zone. Case studies for future programs are highlighted, and potential impacts of global change on the marine Si cycle discussed. PY 2021 PD FEB SO Biogeosciences SN 1726-4170 PU Copernicus GmbH VL 18 IS 4 UT 000621029400001 BP 1269 EP 1289 DI 10.5194/bg-18-1269-2021 ID 75509 ER EF