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Biogeosciences An interactive open-access journal of the European Geosciences Union
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We present a unique and comprehensive time-series study of sulphur compounds at the Boknis Eck Times-Series Station, located in the southwestern Baltic Sea, from 2009 to 2018. Dimethyl sulphide (DMS), one is the sulphur compounds, is considered as an anti-greenhouse gas and hypothesized to produce more under global climate change. However, our decadal study indicates that the general trend of DMS at BE did not follow increasing temperature, but followed some algae groups abundances.
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https://doi.org/10.5194/bg-2020-431
https://doi.org/10.5194/bg-2020-431

  14 Dec 2020

14 Dec 2020

Review status: this preprint is currently under review for the journal BG.

A decade of dissolved sulphur compounds measurements in the southwestern Baltic Sea

Yanan Zhao, Cathleen Schlundt, Dennis Booge, and Hermann W. Bange Yanan Zhao et al.
  • GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany

Abstract. Dissolved sulphur compounds 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 dimethyl sulphide (DMS), total dimethylsulphoniopropionate (DMSPt) and total dimethyl sulphoxide (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 prymnesiophyceae and chrysophytes, respectively. Major Baltic Inflow (MBI) events influenced the distribution of sulphur 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 well reproduces the DMSPp : Chl a ratios during this study and could be used to estimate future surface (5 m) DMSPp concentrations at BE.

Yanan Zhao et al.

 
Status: open (until 07 Feb 2021)
Status: open (until 07 Feb 2021)
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Yanan Zhao et al.

Yanan Zhao et al.

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Short summary
We present a unique and comprehensive time-series study of sulphur compounds at the Boknis Eck Times-Series Station, located in the southwestern Baltic Sea, from 2009 to 2018. Dimethyl sulphide (DMS), one is the sulphur compounds, is considered as an anti-greenhouse gas and hypothesized to produce more under global climate change. However, our decadal study indicates that the general trend of DMS at BE did not follow increasing temperature, but followed some algae groups abundances.
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