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Marcos Herreras-Giralda is an atmospheric scientist whose research focuses on advancing aerosol remote sensing techniques, particularly through innovative use of ground-based instruments. His major contributions center on developing and refining methods to retrieve aerosol optical properties—such as aerosol optical depth (AOD), Ångström exponent, and single scattering albedo—using non-traditional measurements. His most cited work (43 citations) demonstrates how all-sky cameras, combined with the GRASP algorithm, can retrieve aerosol properties from normalized sky radiances, offering a cost-effective alternative to specialized radiometers. He has also pioneered the use of zenith sky radiance measurements for aerosol retrievals and developed a ceilometer inversion method that incorporates water-vapor corrections from co-located microwave radiometers. Notably, Herreras-Giralda has evaluated the impact of columnar NO₂ on aerosol retrieval accuracy, highlighting the importance of accounting for trace gas absorption in sun–sky radiometer data. His work bridges the gap between simple, widely available instruments and sophisticated atmospheric characterization, making aerosol monitoring more accessible. With cumulative citations exceeding 70, his research is increasingly recognized for its practical implications in air quality and climate studies.