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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-9
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
16 Mar 2017
Review status
A revision of this discussion paper was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.
Oxygenated volatile organic carbon in the western Pacific convective centre: ocean cycling, air–sea gas exchange and atmospheric transport
Cathleen Schlundt1,a, Christa A. Marandino1, Susann Tegtmeier1, Sinikka T. Lennartz1, Astrid Bracher2,3, Wee Cheah2,b, Kirstin Krüger4, and Birgit Quack1 1GEOMAR Helmholtz Centre for Ocean Research, Kiel, Düsternbrooker Weg, 20, 24105 Kiel, Germany
2Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 27570, Germany
3Institute of Environmental Physics, University of Bremen, Bremen, 28359, Germany
4Meteorology and Oceanography Department of Geosciences, University of Oslo, Oslo, 0315, Norway
anow at: Josephine Bay Paul Center, Marine Biological Laboratory, Woods Hole, 7 MBL Street, 02540, MA, USA
bnow at: Research Center for Environmental Changes, Academia Sinica, Taipei, 128 Academia Road, 11529 Taipei, Taiwan
Abstract. A suite of oxygenated volatile organic compounds (OVOCs – acetaldehyde, acetone, propanal, butanal and butanone) were measured concurrently in the surface water and atmosphere of the South China Sea and Sulu Sea in November 2011. A strong correlation was observed between all OVOC concentrations in the surface seawater along the entire cruise track, except for acetaldehyde, suggesting similar sources and sinks in the surface ocean. Additionally, several phytoplankton groups, such as haptophytes or pelagophytes, were also correlated to all OVOCs indicating that phytoplankton may be an important source for marine OVOCs in the South China and Sulu Seas. Humic and protein like fluorescent dissolved organic matter (FDOM) components seemed to be additional precursors for butanone and acetaldehyde. The atmospheric OVOC mixing ratios were relative high compared with literature values, suggesting the coastal region of North Borneo as a local hot spot for atmospheric OVOCs. The flux of atmospheric OVOCs was largely into the ocean for all 5 gases, with a few important exceptions near the coast of Borneo. The calculated amount of OVOCs entrained into the ocean seemed to be an important source of OVOCs to the surface ocean. When the fluxes were out of the ocean, marine OVOCs were found to be enough to control the local measured OVOC distribution in the atmosphere. Based on our model calculations, at least 0.4 ppb of marine derived acetone and butanone can reach the upper troposphere, where they may have an important influence on hydrogen oxide radical formation over the western Pacific Ocean.

Citation: Schlundt, C., Marandino, C. A., Tegtmeier, S., Lennartz, S. T., Bracher, A., Cheah, W., Krüger, K., and Quack, B.: Oxygenated volatile organic carbon in the western Pacific convective centre: ocean cycling, air–sea gas exchange and atmospheric transport, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-9, in review, 2017.
Cathleen Schlundt et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'review for Schlundt et al', Mingxi Yang, 30 Mar 2017 Printer-friendly Version 
AC1: 'Author comment to Mingxi Yang', Cathleen Schlundt, 28 Jul 2017 Printer-friendly Version 
 
RC2: 'Review of Schlundt et al', Anonymous Referee #2, 29 Jun 2017 Printer-friendly Version 
AC2: 'Author comment to anonymous referee 2', Cathleen Schlundt, 28 Jul 2017 Printer-friendly Version 
Cathleen Schlundt et al.
Cathleen Schlundt et al.

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Short summary
For the first time several oxygenated volatile organic carbon (OVOC) in the ocean and overlaying atmosphere in the western Pacific Ocean was measured. OVOCs are important for atmospheric chemistry. They are involved in ozone production in the upper troposphere (UT) and they have a climate cooling effect. We showed that phytoplankton was an important source for OVOCs in the surface ocean and when OVOCs are emitted into the atmosphere, they could reach the UT and might influence ozone formation.
For the first time several oxygenated volatile organic carbon (OVOC) in the ocean and overlaying...
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