| 09 Dec 2025
Light-weight Observatory for sOuNdIng clouds and aeorSol, LOONIS: a balloon lifted platform for troposphere aerosol research
Abstract. High-altitude aerosol research is crucial but faces significant cost and logistical hurdles that limit our ability to capture the highly variable vertical distribution of atmospheric trace substances. This paper introduces the Light-weight Observatory for sOuNdIng clouds and aerosol (LOONIS), a versatile, cost-effective, balloon-borne platform that provides an approach to address these challenges. LOONIS integrates a suite of lightweight instruments, such as optical particle counters, which provides real-time in situ detection of aerosol particle number and their microphysical properties, and impactors for collecting particles due to their inertia for subsequent offline physico-chemical analyses. Deployed during two measurement campaigns
in Germany during August 2023 and June 2024, LOONIS provided insights into vertical aerosol distribution, capturing aerosol activation processes within saturated atmospheric layers.
The platform demonstrated enhanced accuracy of particle concentration data from the UCASS instrument through the integration of a Thermal Flow Sensor (TFS). The deployment and resulting dataset underscore LOONIS’s capability as a tool for improving our understanding of atmospheric processes and potentially reducing the knowledge gap in atmospheric aerosol processes.
Competing interests: At least one of the (co-)authors is a member of the editorial board of Atmospheric Measurement Techniques.
Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this paper. While Copernicus Publications makes every effort to include appropriate place names, the final responsibility lies with the authors. Views expressed in the text are those of the authors and do not necessarily reflect the views of the publisher.
