FN Archimer Export Format PT J TI Assessment of C, N and Si isotopes as tracers of past ocean nutrient and carbon cycling BT AF Farmer, Jesse Hertzberg, Jennifer Cardinal, Damien Fietz, Susanne Hendry, Katharine Jaccard, Sam Paytan, Adina Rafter, Patrick Ren, Haojia Somes, Christopher SUTTON, Jill AS 1:1,2;2:3;3:4;4:5;5:6;6:7,8;7:9;8:10;9:11;10:12;11:13;12:; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:; C1 Department of Geosciences, Princeton University, Princeton, NJ, USA Max-Planck Institute for Chemistry, Mainz, Germany Department of Ocean, Earth & Atmospheric Sciences, Old Dominion University, Norfolk, VA, USA LOCEAN (UMR7159), Sorbonne Université, IRD, CNRS, MNHN, Paris, France Department of Earth Sciences, Stellenbosch University, Stellenbosch, South Africa School of Earth Sciences, University of Bristol, Bristol, UK Institute of Geological Sciences and Oeschger Center for Climate Change Research, University of Bern, Bern, Switzerland Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland Institute of Marine Sciences, University of California, Santa Cruz, Santa Cruz, CA, USA Department of Earth System Science, University of California, Irvine, CA, USA Department of Geosciences, National Taiwan University, Taipei, Taiwan GEOMAR Helmholtz Centre for Ocean Research Kiel, 24105 Kiel, Germany Univ Brest, CNRS, IRD, Ifremer, Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France C2 UNIV PRINCETON, USA MAX PLANCK INST CHEM, GERMANY UNIV OLD DOMINION, USA UNIV SORBONNE, FRANCE UNIV STELLENBOSCH, SOUTH AFRICA UNIV BRISTOL, UK UNIV BERN, SWITZERLAND UNIV LAUSANNE, SWITZERLAND UNIV CALIF SANTA CRUZ, USA UNIV CALIF IRVINE, USA UNIV NATL TAIWAN, TAIWAN IFM GEOMAR, GERMANY UBO, FRANCE UM LEMAR IN WOS Cotutelle UMR copubli-france copubli-europe copubli-univ-france copubli-int-hors-europe copubli-sud IF 6.5 TC 7 UR https://archimer.ifremer.fr/doc/00649/76114/85186.pdf LA English DT Article DE ;marine chemistry;carbon;nitrogen;silicon;paleoceanography;stable isotopes AB Biological productivity in the ocean directly influences the partitioning of carbon between the atmosphere and ocean interior, thereby controlling the distributions of many elements and their isotopes in the ocean. Through this carbon cycle feedback, changing ocean productivity has long been hypothesized as a key pathway for modulating past atmospheric carbon dioxide levels and hence global climate. To reconstruct climate impacts from temporal changes in paleoproductivity, robust proxies are needed to test the connection between past ocean productivity, nutrient biogeochemistry, ocean circulation and climate. Here we compile water column carbon (C), nitrogen (N) and silicon (Si) stable isotopes from GEOTRACES-era data in four key ocean regions to review geochemical proxies of oceanic carbon and nutrient partitioning based on the C, N, and Si isotopic composition of marine sediments. Relationships between water column isotope distributions, ocean productivity, and nutrient utilization are discussed. The potential for isotope measurements in sedimentary archives to record aspects of past ocean productivity are evaluated, along with key uncertainties and limitations associated with each proxy. Constraints on past ocean productivity, nutrient cycling and utilization during late Quaternary glacial-interglacial cycles and over the Cenozoic are examined. This review highlights opportunities for future research using multielement proxy applications and emphasizes the importance of such applications to reconstructing Cenozoic climate evolution. PY 2021 PD JUN SO Global Biogeochemical Cycles SN 0886-6236 PU American Geophysical Union VL 35 IS 7 UT 000677815700008 DI 10.1029/2020GB006775 ID 76114 ER EF