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Cited by 21Atmospheric chemistry and aerosolsAtmospheric aerosols and cloudsAir Quality Monitoring and Forecasting

Modular Multiplatform Compatible Air Measurement System (MoMuCAMS): a new modular platform for boundary layer aerosol and trace gas vertical measurements in extreme environments

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Pohorsky, Roman, Baccarini, Andrea, Tolu, Julie, Winkel, Lenny H. E., Schmale, Julia·2024·Atmospheric Measurement Techniques
DOI 10.5194/amt-17-731-2024

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Abstract

Abstract. The Modular Multiplatform Compatible Air Measurement System (MoMuCAMS) is a newly developed in situ aerosol and trace gas measurement platform for lower-atmospheric vertical profiling. MoMuCAMS has been primarily designed to be attached to a Helikite, a rugged tethered balloon type that is suitable for operations in cold and windy conditions. The system addresses the need for detailed vertical observations of atmospheric composition in the boundary layer and lower free troposphere, especially in polar and alpine regions. The MoMuCAMS encompasses a box that houses instrumentation, a heated inlet, a single-board computer to transmit data to the ground for in-flight decisions and a power distribution system. The enclosure can accommodate various combinations of instruments within its weight limit (e.g., 20 kg for a 45 m3 balloon). This flexibility represents a unique feature, allowing for the study of multiple aerosol properties (number concentration, size distribution, optical properties, chemical composition and morphology), as well as trace gases (e.g., CO, CO2, O3, N2O) and meteorological variables (e.g., wind speed and direction, temperature, relative humidity, pressure). Different instrumental combinations are therefore possible to address the specific scientific focus of the observations. It is the first tethered-balloon-based system equipped with instrumentation providing a size distribution for aerosol particles within a large range, i.e., from 8 to 3370 nm, which is vital to understanding atmospheric processes of aerosols and their climate impacts through interaction with radiation and clouds. Here we present a characterization of the specifically developed inlet system and previously unreported instruments, most notably the miniaturized scanning electrical mobility spectrometer and a near-infrared carbon monoxide monitor. As of December 2022, MoMuCAMS has been tested during two field campaigns in the Swiss Alps in winter and fall 2021. It was further deployed in Fairbanks, Alaska, USA, in January–February 2022, as part of the ALPACA (Alaskan Layered Pollution and Chemical Analysis) campaign and in Pallas, Finland, in September–October 2022, as part of the PaCE2022 (Pallas Cloud Experiment) study. Three cases from one of the Swiss Alpine studies are presented to illustrate the various observational capabilities of MoMuCAMS. Results from the first two case studies illustrate the breakup of a surface-based inversion layer after sunrise and the dilution of a 50–70 m thick surface layer. The third case study illustrates the capability of the system to collect samples at a given altitude for offline chemical and microscopic analysis. Overall, MoMuCAMS is an easily deployable tethered-balloon payload with high flexibility, able to cope with the rough conditions of extreme environments. Compared to uncrewed aerial vehicles (drones) it allows for observation of aerosol processes in detail over multiple hours, providing insights into their vertical distribution and processes, e.g., in low-level clouds, that were difficult to obtain beforehand.

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  • In the WPBL under easterly advection from Fairbanks, an Aitken mode peak is observed at 26.0 nm, which is not statistically different from the MsL mode diameter given the uncertainty of the size detection by the instrument.

    “In the WPBL under easterly advection from Fairbanks, we observe an Aitken mode peak at 26.0 nm, which is not statistically different from the MsL mode diameter given the uncertainty of the size detection by the instrument (Pohorsky et al., 2024).”

    From In situ vertical observations of the layered structure of air pollution in a continental high-latitude urban boundary layer during winter (2025) · cites this paper as Pohorsky et al. (2024)

    Section 3.3 reports mSEMS particle-sizing deviations below 7%, supporting the general point that the instrument has sizing uncertainty. The cited paper does not report a 26.0 nm peak in the WPBL, an MsL mode diameter, or a statistical comparison between them; its particle-size discussion in Section 4.2.2 concerns different boundary-layer measurements. (LLM, conf=0.80)

    Experimental — accuracy not yet measured

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Authors
Pohorsky, R., Baccarini, A., Tolu, J., Winkel, L. H. E., & Schmale, J.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • ETH Zurich (CH)
Corresponding author
  • Pohorsky, Roman
  • Schmale, Julia
ORCID
Venue
Atmospheric Measurement Techniques
Publisher
Copernicus GmbH
Published
2024-01-30
Volume
17
Issue
2
Pages
731-754
ISSN
  • 1867-1381 (ISSN-L)
  • 1867-8548
DOI
10.5194/amt-17-731-2024
OpenAlex
W4391375831
Cited by
21
References
51
Citations by year
2026: 6 · 2025: 10 · 2024: 4 · 2023: 1
FWCI
3.66
Type
journal article
Language
en
Open access
Licence
Locations
  • Atmospheric measurement techniques (publishedVersion, cc-by)
  • DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (submittedVersion, cc-by)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection
Funders
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200021_212101)
  • Swiss Polar Institute (Technogrant 2019)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
  • Physical Sciences › Environmental Science › Environmental Engineering › Air Quality Monitoring and Forecasting
Keywords
boundary layer, lower free troposphere, tethered balloon, aerosol size distribution, aerosol-cloud interactions, atmospheric composition, alpaca

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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