A decade of dimethyl sulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethyl sulfoxide (DMSO) measurements in the southwestern Baltic Sea
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Published:2021-03-25
Issue:6
Volume:18
Page:2161-2179
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ISSN:1726-4189
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Container-title:Biogeosciences
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language:en
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Short-container-title:Biogeosciences
Author:
Zhao YananORCID, Schlundt Cathleen, Booge Dennis, Bange Hermann W.ORCID
Abstract
Abstract. Dimethyl sulfide (DMS), dimethylsulfoniopropionate
(DMSP) and dimethyl sulfoxide (DMSO) were measured at the Boknis Eck
Time Series Station (BE, Eckernförde Bay, SW Baltic Sea) during the
period February 2009–December 2018. Our results show considerable
interannual and seasonal variabilities in the mixed-layer concentrations of
DMS, total DMSP (DMSPt) and total DMSO (DMSOt). Positive
correlations were found between particulate DMSP (DMSPp) and
particulate DMSO (DMSOp) as well as DMSPt and DMSOt in the
mixed layer, suggesting a similar source for both compounds. The decreasing
long-term trends, observed for DMSPt and DMS in the mixed layer, were
linked to the concurrent trend of the sum of 19′-hexanoyloxyfucoxanthin and 19′-butanoyloxy-fucoxanthin, which are
the marker pigments of prymnesiophytes and chrysophytes, respectively. Major
Baltic inflow (MBI) events influenced the distribution of sulfur compounds
due to phytoplankton community changes, and sediment might be a potential
source for DMS in the bottom layer during seasonal hypoxia/anoxia at BE. A
modified algorithm based on the phytoplankton pigments reproduces the
DMSPp : Chl a ratios well during this study and could be used to estimate
future surface (5 m) DMSPp concentrations at BE.
Funder
China Scholarship Council
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
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