Preprints
https://doi.org/10.5194/ar-2023-20
https://doi.org/10.5194/ar-2023-20
30 Jan 2024
 | 30 Jan 2024
Status: this preprint is currently under review for the journal AR.

Extended Aerosol Optical Depth (AOD) time series analysis in an Alpine Valley: A Comparative Study from 2007 to 2023

Jochen Wagner, Alma Anna Ubele, Verena Schenzinger, and Axel Kreuter

Abstract. This study presents an extended analysis of aerosol optical depth at 501 nm (AOD) in the Alpine valley of Innsbruck, Austria, from 2007 to 2023, and offers a comparative analysis with the Alpine station of Davos, Switzerland. AOD is derived from ground-based sunphotometer measurements of direct spectral irradiance during daytime. The Davos Station is part of the AErosol Robotic NETwork (AERONET), a global network providing high quality, ground based remote sensing aerosol data and complies with the relevant requirements. The Innsbruck station does not belong to AERONET, but the AOD retrieval algorithm is very similar. Building upon previous research conducted until 2012, the presented study aims to provide a comprehensive understanding of the long-term trends and seasonal variations in aerosol characteristics in Central Alpine regions. We observed the typical mid latitude annual cycle with a maximum in July and a minimum in December. The AOD trends per decade for both stations are declining, -27.9 x 10−3 for Innsbruck and -9.9 x 10−3 for Davos.

Jochen Wagner, Alma Anna Ubele, Verena Schenzinger, and Axel Kreuter

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on ar-2023-20', Anonymous Referee #1, 30 Jan 2024
  • RC2: 'Comment on ar-2023-20', Anonymous Referee #2, 20 Feb 2024
  • RC3: 'Comment on ar-2023-20', Anonymous Referee #3, 20 Feb 2024
Jochen Wagner, Alma Anna Ubele, Verena Schenzinger, and Axel Kreuter
Jochen Wagner, Alma Anna Ubele, Verena Schenzinger, and Axel Kreuter

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Short summary
In this study, we explored how tiny particles in the air, known as aerosols, have changed over time in two mountainous areas in Austria and Switzerland from 2007 to 2023. By using special instruments that measure sunlight, we tracked these changes and found that the amount of aerosols has been decreasing in both locations. This is important because aerosols can affect both our health and the climate. This work is crucial for understanding air quality trends in mountain environments.
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