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\begin{document}

\title{Global Ocean Sediment Composition and Burial Flux in the Deep Sea}



\author[1]{Christopher Hayes}%
\author[2]{Kassandra M Costa}%
\author[3]{Robert F Anderson}%
\author[4]{Eva Calvo}%
\author[5]{Zanna Chase}%
\author[6]{Ludmila L Demina}%
\author[7]{Jean-Claude Dutay}%
\author[2]{Christopher R German}%
\author[8]{Lars-Eric Heimbürger-Boavida}%
\author[9]{Samuel L Jaccard}%
\author[10]{Allison Jacobel}%
\author[11]{Karen E Kohfeld}%
\author[6]{Marina D Kravchishina}%
\author[12]{Jörg Lippold}%
\author[13]{Figen Mekik}%
\author[14]{Lise Missiaen}%
\author[15]{Frank J Pavia}%
\author[16]{Adina Paytan}%
\author[17]{Rut Pedrosa-Pamies}%
\author[8]{Mariia V Petrova}%
\author[1]{Shaily Rahman}%
\author[18]{Laura F Robinson}%
\author[7]{Matthieu Roy-Barman}%
\author[19]{Anna Sanchez-Vidal}%
\author[1]{Alan Shiller}%
\author[20]{Alessandro Tagliabue}%
\author[21]{Allyson C Tessin}%
\author[22]{Marco Van Hulten}%
\author[23]{Jing Zhang}%
\affil[1]{University of Southern Mississippi}%
\affil[2]{Woods Hole Oceanographic Institution}%
\affil[3]{Lamont-Doherty Earth Observatory of Columbia University}%
\affil[4]{CSIC}%
\affil[5]{University of Tasmania}%
\affil[6]{Shirshov Institute of Oceanology}%
\affil[7]{CEA-CNRS-UVSQ}%
\affil[8]{Aix Marseille Université}%
\affil[9]{University of Bern}%
\affil[10]{Brown University}%
\affil[11]{Simon Fraser University}%
\affil[12]{Heidelberg University}%
\affil[13]{Grand Valley State University}%
\affil[14]{Lise Missiaen: Climate Change Research Centre}%
\affil[15]{California Institute of Technology}%
\affil[16]{University of California Santa Cruz}%
\affil[17]{The Ecosystems Center}%
\affil[18]{University of Bristol}%
\affil[19]{University of Barcelona}%
\affil[20]{University of Liverpool}%
\affil[21]{Kent State University}%
\affil[22]{University of Bergen}%
\affil[23]{Shanghai Jiao Tong University}%


\vspace{-1em}



  
  \date{May 24, 2024}


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\selectlanguage{english}
\begin{abstract}
Quantitative knowledge about the burial of sedimentary components at the
seafloor has wide-ranging implications in ocean science, from global
climate to continental weathering. The use of 230 Th-normalized fluxes
reduces uncertainties that many prior studies faced by accounting for
the effects of sediment redistribution by bottom currents and minimizing
the impact of age model uncertainty. Here we employ a recently compiled
global dataset of 230 Th-normalized fluxes with an updated database of
seafloor surface sediment composition to derive global maps of the
burial flux of calcium carbonate, biogenic opal, total organic carbon
(TOC), non-biogenic material, iron, mercury, and excess barium (Baxs).
The spatial patterns of burial of the major components are mainly
consistent with prior work, but the new quantitative estimates allow
evaluations of global deep-sea burial. Our integrated deep-sea burial
fluxes are 136 Tg C/yr CaCO3, 153 Tg Si/yr opal, 20Tg C/yr TOC, 220 Mg
Hg/yr, and 2.6 Tg Baxs/yr. Sedimentary Fe fluxes reflect a mixture of
sources including lithogenic material, hydrothermal inputs and
authigenic phases. The fluxes of some commonly used paleo-productivity
proxies (TOC, biogenic opal, and Baxs) are not well-correlated
geographically with satellite-based productivity estimates. Our new
compilation of sedimentary fluxes provides more detailed information on
burial fluxes, which should lead to improvements in the understanding of
how preservation affects these paleoproxies.%
\end{abstract}%



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