Global boron cycle in the Anthropocene

Published

Journal Article

©2016. American Geophysical Union. All Rights Reserved. This paper presents a revised and updated synthesis of the biogeochemical cycle of boron at the Earth's surface, where the largest fluxes are associated with the injection of sea-salt aerosols to the atmosphere (1.44 Tg B/yr), production and combustion of fossil fuels (1.2 Tg B/yr), atmospheric deposition (3.48 Tg B/yr), the mining of B ores (1.1 Tg B/yr), and the transport of dissolved and suspended matter in rivers (0.80 Tg B/yr). The new estimates show that anthropogenic mobilization of B from the continental crust exceeds the naturally occurring processes, resulting in substantial fluxes to the ocean and the hydrosphere. The anthropogenic component contributes 81% of the flux in rivers. The mean residence time for B in seawater supports the use of δ11B in marine carbonates as an index of changes in the pH of seawater over time periods of > 1 Ma.

Full Text

Duke Authors

Cited Authors

  • Schlesinger, WH; Vengosh, A

Published Date

  • February 1, 2016

Published In

Volume / Issue

  • 30 / 2

Start / End Page

  • 219 - 230

Electronic International Standard Serial Number (EISSN)

  • 1944-9224

International Standard Serial Number (ISSN)

  • 0886-6236

Digital Object Identifier (DOI)

  • 10.1002/2015GB005266

Citation Source

  • Scopus