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https://doi.org/10.5194/bg-2019-172
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-2019-172
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 28 May 2019

Research article | 28 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Biogeosciences (BG).

Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow Seas during summer and winter

Xi Wu2,3, Pei-Feng Li2,3, Hong-Hai Zhang1,2,3, Mao-Xu Zhu1,2,3, Chun-Ying Liu1,2,3, and Gui-Peng Yang1,2,3 Xi Wu et al.
  • 1Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao, 266100, China
  • 2Laboratory for Marine Ecologyand Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
  • 3College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China

Abstract. Spatio-temporal distributions of acrylic acid (AA) and related biogenic sulfur compounds including dimethylsulfide (DMS) and dissolved and total dimethylsulfoniopropionate (DMSPd and DMSPt) were investigated in the Bohai Sea (BS) and the Yellow Sea (YS) during summer and winter. AA and DMS production from DMSPd degradation and AA degradation were studied. Significant seasonal variations of AA and DMS(P) were observed. AA presented similar distributions during summer and winter, that is, relatively high values of AA emerged in the BS and the north YS and concentrations decreased from inshore to offshore areas in the south YS. Due to strong biological production from DMSP and abundant terrestrial inputs from rivers in summer, AA concentrations at surface were higher during summer (30.01 nmol L−1) than during winter (14.98 nmol L−1). The average concentration sequence AA>DMSPt>DMS>DMSPd at transects during summer illustrated particulate DMSP (DMSPp) as a DMS producer and terrestrial sources of AA, whereas the sequence in winter was AA>DMSPt>DMSPd>DMS. High values of AA and DMS(P) were mostly observed in the upper layers with occasional high values at bottom. High AA concentrations in porewater which could be transported into the bottom water might result from the cleavage of intracellular DMSP and reduce bacterial metabolism in sediments. In addition, the degradation/production rates of biogenic sulfur compounds were obviously higher in summer than in winter and the removal of AA was mainly attributed to the microbial consumption. Other sources of AA besides the production from DMSPd was also proved.

Xi Wu et al.
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Xi Wu et al.
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Short summary
Acrylic acid (AA) exhibited obvious spatial and temporal variations in the Bohai and Yellow Seas. Strong biological production and abundant terrestrial inputs led to high AA in summer. Extremely high AA in sediments might result from the cleavage of intracellular DMSP and reduce bacterial metabolism. Degradation experiments of AA and DMSP proved other sources of AA and microbial consumption as the main removal. This study provided insightful information on sulfur cycle in marginal seas.
Acrylic acid (AA) exhibited obvious spatial and temporal variations in the Bohai and Yellow...
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