Optical properties of water-coated sea salt model particles
Journal article, 2021

We investigate the optical properties of marine aerosol in dependence of the water content. To this end we develop a model geometry that realistically mimics the morphological changes as the salt particles take up more water. The results are compared to morphologically simpler models, namely, homogeneous and inhomogeneous superellipsoids, as well as cube-sphere hybrids. The reference model yields depolarization ratios, depending on size and water uptake, in the range from 0 to 0.36 ± 0.12. Overall, the simple models can reproduce optical properties of the reference model. The overall nonsphericity, as well as inhomogeneity are identified as key morphological parameter, while rounding of edges only has a minor impact on optical properties.


Franz Kanngiesser

Geoscience and Remote Sensing

Michael Kahnert


Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Optics Express

1094-4087 (ISSN) 10944087 (eISSN)

Vol. 29 22 34926-34950

Subject Categories

Applied Mechanics

Meteorology and Atmospheric Sciences

Water Engineering





Related datasets

Optical properties of water-coated sea salt aerosol [dataset]

DOI: 10.5281/zenodo.4945523

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