Marine carbohydrates and other sea spray aerosol constituents across altitudes in the lower troposphere of Ny-Ålesund, Svalbard


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moritz.zeising [ at ] awi.de

Abstract

Marine combined carbohydrates in aerosol particles (CCHO<inf>aer</inf>) have the potential to influence cloud formation and properties, but it remains unclear to what extent they reach altitudes relevant for cloud processes. Balloon-borne measurements of major sea spray aerosol (SSA) constituents, including sodium (Na<inf>aer</inf><sup>+</sup>) and CCHO<inf>aer</inf>, were conducted in autumn 2021 and spring 2022 in Ny-Ålesund (Svalbard). Total suspended particles were collected at 321-1112 m, covering both the marine boundary layer and the free troposphere, with Na<inf>aer</inf><sup>+</sup> ranging 23-850 ng m<sup>-3</sup> and CCHO<inf>aer</inf> 3.8-274 ng m<sup>-3</sup>. The chemical composition of balloon-borne aerosol samples was compared with synchronized ground level measurements at the balloon's winch (Na<inf>aer</inf><sup>+</sup>: 35-3710 ng m<sup>-3</sup>; CCHO<inf>aer</inf>: 1.9-194 ng m<sup>-3</sup>), and at the Old Pier (Na<inf>aer</inf><sup>+</sup>: 140-1470 ng m<sup>-3</sup>; CCHO<inf>aer</inf>: 1.6-10.0 ng m<sup>-3</sup>), where freshly emitted SSA particles were sampled. Surface seawater from the Kongsfjorden was analyzed to evaluate the sea-air transfer of marine CCHO. Air mass histories, atmospheric mixing, and cloud conditions were evaluated for three selected cases to explain vertical concentration patterns. A strong correlation (RCombining double low line0.78,p<0.001) between combined xylose (< 0.2-14.1 ng m<sup>-3</sup>) in CCHO<inf>aer</inf> and oxalate<inf>aer</inf> (< 1-67 ng m<sup>-3</sup>) across all altitudes, suggests either coproduction or a connection through atmospheric processing. These results provide a first comprehensive picture of how local primary sea-air transfer of marine combined carbohydrates, long-range transport, in-situ formation, and atmospheric processing together shape their distribution.



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Eprint ID
60932
DOI 10.5194/acp-26-7235-2026

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Zeppenfeld, S. , Schaefer, J. , Pilz, C. , Ebell, K. , Zeising, M. , Stratmann, F. , Siebert, H. , Wehner, B. , Wietz, M. , Bracher, A. and Van Pinxteren, M. (2026): Marine carbohydrates and other sea spray aerosol constituents across altitudes in the lower troposphere of Ny-Ålesund, Svalbard , Atmospheric Chemistry and Physics, 26 (10), pp. 7235-7260 . doi: 10.5194/acp-26-7235-2026


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