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Purpose <p>This study aims to provide the first analysis of aerosol optical properties, radiative forcing, and source identification over Birkat al Mouz, Oman, using Aerosol Robotic Network (AERONET) data from December 2022 to November 2024.</p> Methods <p>We analyzed Aerosol Optical Depth (AOD), Angstrom Exponent (AE), Single Scattering Albedo (SSA), aerosol radiative forcing (RF), and performed Concentration-Weighted Trajectory (CWT) analysis to identify aerosol transport pathways and sources.</p> Results <p>The highest aerosol loading (AOD = 0.49&#xa0;±&#xa0;0.15) occurred in summer, with the lowest (0.17&#xa0;±&#xa0;0.08) in winter. AE values (maximum 0.94&#xa0;±&#xa0;0.20 in winter, minimum 0.42&#xa0;±&#xa0;0.17 in summer) indicated coarse-mode aerosol dominance. Seasonal SSA values were highest in summer (0.95), confirming significant dust aerosol influence. Surface RF averaged − 43.81&#xa0;W&#xa0;m<sup>−2</sup>, atmospheric RF was 27.04&#xa0;W&#xa0;m<sup>−2</sup>, and aerosol-induced heating reached 0.74&#xa0;K&#xa0;day<sup>−1</sup>. CWT analysis revealed the Horn of Africa, and arid regions of the Arabian Peninsula as major aerosol sources.</p> Conclusion <p>Seasonal aerosol variations in Birkat al Mouz are predominantly driven by dust aerosols transported from remote regions, highlighting their significant role in regional climate forcing.</p> Graphical abstract <p></p>

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Initial Study of Column-Integrated Aerosol Optical Properties over Birkat al Mouz, Sultanate of Oman

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月23日

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  • Baiju Dayanandan,
  • Nirmal Krishna,
  • Ajay Parottil,
  • Vinoj Velu,
  • Ahmed Al Harrasi,
  • Binisia Sanatan,
  • Pawan Gupta,
  • Tom Eck,
  • Alexander Smirnov,
  • Humaid AlBadi

摘要

Purpose

This study aims to provide the first analysis of aerosol optical properties, radiative forcing, and source identification over Birkat al Mouz, Oman, using Aerosol Robotic Network (AERONET) data from December 2022 to November 2024.

Methods

We analyzed Aerosol Optical Depth (AOD), Angstrom Exponent (AE), Single Scattering Albedo (SSA), aerosol radiative forcing (RF), and performed Concentration-Weighted Trajectory (CWT) analysis to identify aerosol transport pathways and sources.

Results

The highest aerosol loading (AOD = 0.49 ± 0.15) occurred in summer, with the lowest (0.17 ± 0.08) in winter. AE values (maximum 0.94 ± 0.20 in winter, minimum 0.42 ± 0.17 in summer) indicated coarse-mode aerosol dominance. Seasonal SSA values were highest in summer (0.95), confirming significant dust aerosol influence. Surface RF averaged − 43.81 W m−2, atmospheric RF was 27.04 W m−2, and aerosol-induced heating reached 0.74 K day−1. CWT analysis revealed the Horn of Africa, and arid regions of the Arabian Peninsula as major aerosol sources.

Conclusion

Seasonal aerosol variations in Birkat al Mouz are predominantly driven by dust aerosols transported from remote regions, highlighting their significant role in regional climate forcing.

Graphical abstract