TY - JOUR
T1 - Dissolved organic sulfur in the ocean
T2 - Biogeochemistry of a petagram inventory
AU - Ksionzek, Kerstin B.
AU - Lechtenfeld, Oliver J.
AU - McCallister, S. Leigh
AU - Schmitt-Kopplin, Philippe
AU - Geuer, Jana K.
AU - Geibert, Walter
AU - Koch, Boris P.
N1 - Publisher Copyright:
Copyright 2016 by the American Association for the Advancement of Science; all rights reserved.
PY - 2016/10/28
Y1 - 2016/10/28
N2 - Although sulfur is an essential element for marine primary production and critical for climate processes, little is known about the oceanic pool of nonvolatile dissolved organic sulfur (DOS).We present a basin-scale distribution of solid-phase extractable DOS in the East Atlantic Ocean and the Atlantic sector of the Southern Ocean. Although molar DOS versus dissolved organic nitrogen (DON) ratios of 0.11 ± 0.024 in Atlantic surface water resembled phytoplankton stoichiometry (sulfur/nitrogen ∼ 0.08), increasing dissolved organic carbon (DOC) versus DOS ratios and decreasing methionine-S yield demonstrated selective DOS removal and active involvement in marine biogeochemical cycles. Based on stoichiometric estimates, the minimum global inventory of marine DOS is 6.7 petagrams of sulfur, exceeding all other marine organic sulfur reservoirs by an order of magnitude.
AB - Although sulfur is an essential element for marine primary production and critical for climate processes, little is known about the oceanic pool of nonvolatile dissolved organic sulfur (DOS).We present a basin-scale distribution of solid-phase extractable DOS in the East Atlantic Ocean and the Atlantic sector of the Southern Ocean. Although molar DOS versus dissolved organic nitrogen (DON) ratios of 0.11 ± 0.024 in Atlantic surface water resembled phytoplankton stoichiometry (sulfur/nitrogen ∼ 0.08), increasing dissolved organic carbon (DOC) versus DOS ratios and decreasing methionine-S yield demonstrated selective DOS removal and active involvement in marine biogeochemical cycles. Based on stoichiometric estimates, the minimum global inventory of marine DOS is 6.7 petagrams of sulfur, exceeding all other marine organic sulfur reservoirs by an order of magnitude.
UR - http://www.scopus.com/inward/record.url?scp=84990871432&partnerID=8YFLogxK
U2 - 10.1126/science.aaf7796
DO - 10.1126/science.aaf7796
M3 - Article
C2 - 27789839
AN - SCOPUS:84990871432
SN - 0036-8075
VL - 354
SP - 456
EP - 459
JO - Science
JF - Science
IS - 6311
ER -
