Відновлення параметрів газово-аерозольного середовища атмосфери над позицією CESAR Observatory, Нідерланди
With the method previously proposed by the authors for recovering the parameters of the multimode aerosol component in the atmosphere, the data of polarization measurements of the sky above the position of CESAR Observatory, the Netherlands, at 14:55 UTC on July 9, 2013, have been analyzed. The pres...
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| Datum: | 2025 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | English Ukrainian |
| Veröffentlicht: |
Publishing house "Academperiodika"
2025
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| Online Zugang: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023618 |
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| Назва журналу: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Zusammenfassung: | With the method previously proposed by the authors for recovering the parameters of the multimode aerosol component in the atmosphere, the data of polarization measurements of the sky above the position of CESAR Observatory, the Netherlands, at 14:55 UTC on July 9, 2013, have been analyzed. The presence of two aerosol modes with the normal-logarithmic particle size distribution is revealed, and some of their microphysical parameters are recovered. The following parameter values are determined for the coarse-dispersed mode: the real part of the refractive index nr = 1.53, the effective radius of the particles r = 0.9 μm, the dispersion σ2 = 0.36, and the weighting factor of this mode in the total degree of linear polarization of the aerosol mixture coef1 = 0.1. For the fine-dispersed mode, nr = 1.49, r = 0.11 μm, and σ2 = 0.4. The quantitative ratio between the indicated aerosol modes in the air above the observation position is estimated to be approximately 1 : 9. The spectral values of the relative contribution of gas scattering were determined: β(870 nm) = 0.3 and β(675 nm) = 0.46. The incorrectness of using the single Rayleigh scattering model in the short-wavelength region of the visible light spectrum at high air saturation levels with aerosol has been pointed out. A substantial influence of multiple light scattering on the results of polarimetric measurements at a wavelength of 441 nm under the specified atmospheric conditions of sky observation has been demonstrated. |
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