Dataset Information


Organic sulfur: a spatially variable, labile, and understudied component of marine organic matter


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 sulfur-containing 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.

INSTRUMENT(S): LTQ FT Ultra (Thermo Scientific)

SUBMITTER: Krista Longnecker  

PROVIDER: MTBLS1024 | MetaboLights | 2019-11-12


Dataset's files

Action DRS
MTBLS1024 Other
KN210_1019_ppl_neg_400k.raw Raw
KN210_1046_ppl_neg_400k_run2.raw Raw
KN210_1050_ppl_neg_400k.raw Raw
KN210_12_ppl_neg_400k_rerun.raw Raw
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