Document Type

Article

Publication Date

2-2020

DOI

10.1002/lol2.10149

Publication Title

Limnology and Oceanography Letters

Pages

1-8 pp.

Abstract

Sulfur (S) is a major heteroatom in organic matter. This project evaluated spatial variability in the concentration and molecular-level composition of organic sulfur along gradients of depth and latitude. We measured the concentration of total organic sulfur (TOS) directly from whole seawater. Our data reveal high variability in organic sulfur, relative to established variability in total organic carbon or nitrogen. The deep ocean contained significant amounts of organic sulfur, and the concentration of TOS in North Atlantic Deep Water (NADW) decreased with increasing age while total organic carbon remained stable. Analysis of dissolved organic matter extracts by ultrahigh resolution mass spectrometry revealed that 6% of elemental formulas contained sulfur. The sulfurcontaining compounds were structurally diverse, and showed higher numbers of sulfur-containing elemental formulas as NADW moved southward. These measurements of organic sulfur in seawater provide the foundation needed to define the factors controlling organic sulfur in the global ocean.

Comments

Early access are articles that have been peer-reviewed and accepted for publication.The article content has been finalized, but it has not been assigned to an issue yet.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Limnology and Oceanography Letters 2020

© 2020 The Authors. Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography.

Original Publication Citation

Longnecker, K., Oswald, L., Soule, M. C. K., Cutter, G. A., & Kujawinski, E. B. Organic sulfur: A spatially variable and understudied component of marine organic matter. Limnology and Oceanography Letters, 8. doi:10.1002/lol2.10149

ORCID

0000-0001-6744-6718 (Cutter)

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