Preprints
https://doi.org/10.5194/egusphere-2022-499
https://doi.org/10.5194/egusphere-2022-499
 
22 Jun 2022
22 Jun 2022

DMS cycling in the Sea Surface Microlayer in the South West Pacific: 1. Enrichment potential determined using a novel sampler

Alexia D. Saint-Macary1,2, Andrew Marriner1, Theresa Barthelmeß3, Stacy Deppeler1, Karl Safi4, Rafael Costa Santana1,2, Mike Harvey1, and Cliff S. Law1,2 Alexia D. Saint-Macary et al.
  • 1National Institute of Water and Atmospheric Research, Wellington, 6021, New Zealand
  • 2Department of Marine Science, University of Otago, Dunedin, 9016, New Zealand
  • 3GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, 24148, Germany
  • 4National Institute of Water and Atmospheric Research, Hamilton, 3216, New Zealand

Abstract. Elevated dimethyl sulfide (DMS) concentrations in the sea surface microlayer (SML) have been previously related to DMS air-sea flux anomalies in the South West Pacific. To further address this, DMS, its precursor dimethylsulfoniopropionate (DMSP), and ancillary variables were sampled in the SML and also subsurface water at 0.5 m depth (SSW) in different water masses east of New Zealand. Despite high phytoplankton biomass at certain stations significant chlorophyll a and DMSP enrichments were only apparent at one of six stations, with the DMSP enrichment factor (EF) ranging from 0.81 to 1.25. DMS in the SML was determined using a novel gas-permeable tube technique which measured consistently higher concentrations than with the traditional glass plate technique; however, DMS enrichment was also present at only one station, with the EF ranging from 0.40 to 1.22. SML DMSP and DMS were influenced by phytoplankton community composition, with correlations with dinoflagellate and Gymnodinium biomass, respectively. DMSP and DMS concentrations were also correlated between the SML and SSW, with the difference in ratio attributable to greater DMS loss to the atmosphere from the SML. DMS in the SML did not significantly influence regional DMS emissions, with the calculated air-sea DMS flux of 1.0 to 11.0 µmol m-2 d-1 consistent with climatological estimates for the region. These results extend previous regional observations that DMS is associated with dinoflagellate abundance but indicate that additional factors are required for significant enrichment in the SML.

Journal article(s) based on this preprint

11 Jan 2023
Dimethyl sulfide cycling in the sea surface microlayer in the southwestern Pacific – Part 1: Enrichment potential determined using a novel sampler
Alexia D. Saint-Macary, Andrew Marriner, Theresa Barthelmeß, Stacy Deppeler, Karl Safi, Rafael Costa Santana, Mike Harvey, and Cliff S. Law
Ocean Sci., 19, 1–15, https://doi.org/10.5194/os-19-1-2023,https://doi.org/10.5194/os-19-1-2023, 2023
Short summary

Alexia D. Saint-Macary et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-499', Anonymous Referee #1, 22 Jul 2022
  • RC2: 'Comment on egusphere-2022-499', Anonymous Referee #2, 29 Jul 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-499', Anonymous Referee #1, 22 Jul 2022
  • RC2: 'Comment on egusphere-2022-499', Anonymous Referee #2, 29 Jul 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Alexia Saint-Macary on behalf of the Authors (25 Aug 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (01 Sep 2022) by Mario Hoppema
RR by Anonymous Referee #2 (06 Oct 2022)
ED: Reconsider after major revisions (17 Oct 2022) by Mario Hoppema
AR by Alexia Saint-Macary on behalf of the Authors (21 Oct 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (23 Oct 2022) by Mario Hoppema
RR by Anonymous Referee #2 (24 Oct 2022)
ED: Publish subject to technical corrections (18 Nov 2022) by Mario Hoppema

Journal article(s) based on this preprint

11 Jan 2023
Dimethyl sulfide cycling in the sea surface microlayer in the southwestern Pacific – Part 1: Enrichment potential determined using a novel sampler
Alexia D. Saint-Macary, Andrew Marriner, Theresa Barthelmeß, Stacy Deppeler, Karl Safi, Rafael Costa Santana, Mike Harvey, and Cliff S. Law
Ocean Sci., 19, 1–15, https://doi.org/10.5194/os-19-1-2023,https://doi.org/10.5194/os-19-1-2023, 2023
Short summary

Alexia D. Saint-Macary et al.

Alexia D. Saint-Macary et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The uppermost oceanic layer was sampled to determine what can explain a potential dimethyl sulfide (DMS) enrichment in this environment. A novel sampling method was used, and the results showed that DMS was not as enriched as expected. Our results showed that the phytoplanktonic composition influenced the DMS concentration, confirming results from another study in this oceanic region. However, additional factors are required to observe a DMS enrichment in the uppermost oceanic layer.