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The development of a miniaturised balloon-borne cloud water sampler and its first deployment in the high Arctic
Stockholms universitet, Institutionen för miljövetenskap.
Stockholms universitet, Institutionen för miljövetenskap.
Stockholms universitet, Meteorologiska institutionen (MISU).
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Number of Authors: 9
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2021 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 73, no 1, p. 1-12, article id 1915614Article in journal (Refereed) Published
Abstract [en]

The chemical composition of cloud water can be used to infer the sources of particles upon which cloud droplets and ice crystals have formed. In order to obtain cloud water for analysis of chemical composition for elevated clouds in the pristine high Arctic, balloon-borne active cloud water sampling systems are the optimal approach. However, such systems have not been feasible to deploy previously due to their weight and the challenging environmental conditions. We have taken advantage of recent developments in battery technology to develop a miniaturised cloud water sampler for balloon-borne collection of cloud water. Our sampler is a bulk sampler with a cloud drop cutoff diameter of approximately 8 µm and an estimated collection efficiency of 70%. The sampler was heated to prevent excessive ice accumulation and was able to operate for several hours under the extreme conditions encountered in the high Arctic. We have tested and deployed the new sampler on a tethered balloon during the Microbiology-Ocean-Cloud-Coupling in the High Arctic (MOCCHA) campaign in August and September 2018 close to the North pole. The sampler was able to successfully retrieve cloud water samples that were analysed to determine their chemical composition as well as their ice-nucleating activity. Given the pristine conditions found in the high Arctic we have placed significant emphasis on the development of a suitable cleaning procedure to minimise background contamination by the sampler itself.

Place, publisher, year, edition, pages
2021. Vol. 73, no 1, p. 1-12, article id 1915614
Keywords [en]
instrument development, balloon-borne sampling, cloud water composition, Arctic, clouds, cloud water sampling
National Category
Earth and Related Environmental Sciences
Research subject
SWEDARCTIC 2018, Arctic Ocean 2018
Identifiers
URN: urn:nbn:se:polar:diva-8879DOI: 10.1080/16000889.2021.1915614ISI: 000649431100001OAI: oai:DiVA.org:polar-8879DiVA, id: diva2:1629918
Available from: 2021-06-09 Created: 2022-01-19Bibliographically approved

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