edu.ucar.opensky::articles:25582 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:39:16.085251 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7t43xvg https://doi.org/10.13012/B2IDB-8157303_V1 https Related Dataset #1 Data for: Quantifying the effects of mixing state on aerosol optical properties https://doi.org/10.5281/zenodo.5644422 https Related Software #1 compdyn/partmc: Version 2.6.0 Quantifying the effects of mixing state on aerosol optical properties 2022-07-19T00:00:00Z publication https://n2t.org/ark:/85065/d7t43xvg https://doi.org/10.5194/acp-22-9265-2022 Yao, Y. author Curtis, J. H. author Ching, J. author Zheng, Zhonghua author Riemer, N. author UCAR/NCAR - Library publisher Calculations of the aerosol direct effect on climate rely on simulated aerosol fields. The model representation of aerosol mixing state potentially introduces large uncertainties into these calculations, since the simulated aerosol optical properties are sensitive to mixing state. In this study, we systematically quantified the impact of aerosol mixing state on aerosol optical properties using an ensemble of 1800 aerosol populations from particle-resolved simulations as a basis for Mie calculations for optical properties. Assuming the aerosol to be internally mixed within prescribed size bins caused overestimations of aerosol absorptivity and underestimations of aerosol scattering. Together, these led to errors in the populations' single scattering albedo of up to -22.3 % with a median of -0.9 %. The mixing state metric chi proved useful in relating errors in the volume absorption coefficient, the volume scattering coefficient and the single scattering albedo to the degree of internally mixing of the aerosol, with larger errors being associated with more external mixtures. At the same time, a range of errors existed for any given value of chi. We attributed this range to the extent to which the internal mixture assumption distorted the particles' black carbon content and the refractive index of the particle coatings. Both can vary for populations with the same value of chi. These results are further evidence of the important yet complicated role of mixing state in calculating aerosol optical properties. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation