Characterisation of particle single-scattering albedo with a modified airborne dual-wavelength CAPS monitor

Abstract SSA; Aerodyne), to simultaneously measure the aerosol optical scattering and extinction at both 450 and 630 nm wavelengths. Replaced pressure and temperature sensors and an additional flow control system were incorporated into the A2S2 for its utilisation on board research aircraft measuring within the troposphere. The evaluation of A2S2 characteristics was performed in the laboratory and included the investigation of the signal-to-noise ratio, validation of performance at various pressure levels, optical closure studies and intercomparing with the currently validated techniques. The chamber experiments show that the A2S2 can perform measurements at sample pressures as low as 550 hPa and at sample temperatures as high as 315 K. Based on the Allan analysis results, we have evaluated that the minimum detection limit of the measurements shows that the measurements have a limit accuracy of ∼ Mm - 1 at 450 nm and ∼ Mm - 1 at 630 nm for 1 Hz measurements of both scattering coefficients (σ sca σ ext D p < σ sca σ ext ex). The absorption coefficient (σ abs σ sca σ ext at both blue and red wavelengths, and it stands as a viable substitute for future airborne evaluations of aerosol optical properties.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Characterisation of particle single-scattering albedo with a modified airborne dual-wavelength CAPS monitor ; volume:17 ; number:11 ; year:2024 ; pages:3419-3437 ; extent:19 ; Atmospheric measurement techniques ; 17, Heft 11 (2024), 3419-3437 (gesamt 19)

Contributors, Places and Time

• Creator: Yu, Chenjie ; Pangui, Edouard ; Tu, Kevin ; Cazaunau, Mathieu ; Feingesicht, Maxime ; Xavier, Landsheere ; Bourrianne, Thierry ; Michoud, Vincent ; Cantrell, Christopher ; Onasch, Timothy B. ; Freedman, Andrew ; Formenti, Paola

Further information

• DOI: 10.5194/amt-17-3419-2024
• URN: urn:nbn:de:101:1-2406060417501.046896735555
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:48 AM CEST