Simulation of coronas, glories and fogbows

References

[1] S.M. Prigarin, K.B. Bazarov, U.G. Oppel, Looking for a glory in A-water clouds, Atmospheric and Oceanic Optics, Vol.25 (2012), No.4, P.307-313

Abstract: In this paper we discuss a hypothesis proposed by Anatoly N. Nevzorov that considerable amount of water in cold clouds can exist in a specific phase state with the refractive index ≈1.8 and density higher than 2 g/cm³ (so called A-water). One of the arguments mentioned in favor of this hypothesis is that the glory phenomenon can be better explained by existence of A-water. In our paper we consider this argument in detail studying the phase functions of A-water clouds for different distributions of droplet size.

Key words: clouds, A-water, glory, rainbow, corona, phase function, polarization

DOI: 10.1134/S1024856012040124

[2] S.M. Prigarin, K.B. Bazarov, M. Kerscher, U.G. Oppel, Numerical study of rainbows and glories in water-drop clouds, Russian J. Numer. Anal. Math. Modelling, V.28 (2013), No.3, P.245-266

Abstract: In this paper we study scattering phase functions in water-drop clouds for various distributions of droplet size and various conditions of glory, rainbow and corona formation, and discuss the hypothesis proposed by A. N. Nevzorov that a considerable amount of water in cold clouds can exist in a specific phase state with the refractive index ≈ 1.8 (so called A-water). Polarization and angular distributions are studied by the Monte Carlo method for radiation reflected by cloud layers with drops of water or hypothetical A-water taking into account multiple scattering. Computational results make it possible to develop procedures for analysis of microphysical structure of clouds and confirmation or disproof of the existence of A-water.

Key words: optics of water-drop clouds, A-water,glory, rainbow, corona, scattering phase function, polarization of light, multiple scattering.

DOI: 10.1515/ rnam-2013-0015

[3] Sergei M. Prigarin, Kim B. Bazarov, Ulrich G. Oppel, The effect of multiple scattering on polarization and angular distributions for radiation reflected by clouds: results of Monte Carlo simulation, Proc. SPIE 9292, 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 929201 (December 3, 2014)

Abstract: In this paper we study the light scattering in water-drop clouds for various distributions of droplet size. Polarization and angular distributions are simulated by Monte Carlo method for radiation reflected by cloud layers. Computational results make it possible to develop procedures for analyzing the microphysical structure of clouds.

Keywords: optics of water-drop clouds, polarization of light, multiple scattering, Monte Carlo simulation

DOI: 10.1117/12.2177947

[4] E.G. Kablukova, S.M. Prigarin, S.A. Rozhenko, Phase functions, glories, fogbows and coronas for clouds with mirror-transformed gamma- and bimodal-distributions. Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 968026 (November 19, 2015), 5p.

Abstract: In this paper we study the phase functions for water-droplet clouds and fogs computed by the Mie theory for specific bimodal and “mirror”- transformed droplet size gamma-distributions. In addition, we construct images of coronas, fogbows and glory that can occur for such cloud and fog models.

Keywords: optics of water-droplet clouds and fogs, scattering phase function, fogbows, glory, coronas.

DOI: 10.1117/12.2205949

[5] E.G. Kablukova, S.M. Prigarin, Monte Carlo simulation of specific features of radiation regime in clouds caused by underlying surface, Proc. SPIE 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 100351N (November 29, 2016)

Abstract — This paper presents the results of Monte Carlo simulation of the radiation regime in clouds and describes the effects caused by solar radiation reflected by the underlying surface. Simulation results show that under certain conditions the actinic flux and irradiance can achieve maximal values at specific heights inside.

Keywords: radiation transfer, clouds, underlying surface, Monte Carlo simulation

DOI:10.1117/12.2248976

[6] Andrey V. Zakovryashin, Sergei M. Prigarin, "Software for phase functions fast computation and optical phenomena visualization in water-drop atmospheric clouds," Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 108332Y (13 December 2018)

Abstract — In this paper, we describe numerical and visualization software that allows one to compute phase functions of atmospheric water-drop clouds for an arbitrary distribution of drop radius and represent such optical phenomena as fogbows, glories and coronas. High performance and computational accuracy of the algorithms are provided by the use of a large array of data preliminarily calculated for monodisperse media, and numerical integration by high-order quadrature rules. The software has a user-friendly interface, which allows an interactive design of particle size distributions, simultaneous computation of phase functions for several wavelengths, and immediate visualization of possible optical phenomena.

Keywords: Mie scattering, phase function, cloud, corona, glory, fogbow, numerical and visualization software

DOI: 10.1117/12.2505569

[7] Sergei M. Prigarin, Evgeniya G. Kablukova, Sergei A. Rozhenko, Andrei V. Zakovryashin, "Monte Carlo simulation of halos, glories, coronas and multiple scattering of light", Proc. SPIE 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 104661K (30 November 2017)

Abstract — The paper deals with the simulation of such optical phenomena as halos, glories and coronas. To simulate these, we use the Monte Carlo method taking into account the multiple scattering of solar radiation. We have developed visualization software to represent computational results.

Keywords: radiation transfer, clouds, Monte Carlo simulation, halo, glory, corona

DOI: 10.1117/12.2287239

[8] Zakovryashin A.V., Prigarin S.M. Fast calculation of phase functions and study of optical phenomena for various cloud and fog models using numerical simulation. Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115601M (12 November 2020)

Abstract — This paper deals with the development of software that allows one to compute the scattering phase functions of the optical radiation in polydisperse media consisting of spherical particles, based on the Mie scattering theory. The software also enables computer visualization of such optical phenomena as rainbows, glories and coronas. A special technique is used to significantly accelerate the integration over the radius of scattering particles and to increase the calculation rate of the scattering phase functions. Using the software developed, we have performed a detailed analysis of the scattering phase functions for a large number of well-known cloud and fog models, and have created computer images of optical phenomena (rainbows, glories, and coronas) that are inherent to the considered models.

Keywords: radiative transfer, optical phenomena, clouds, phase functions, Monte Carlo method, numerical integration, moving average method, rainbows, glories, coronas

DOI: 10.1117/12.2575488 (WoS, SCOPUS)

[9] Zakovryashin A.V., Prigarin S.M. Numerical simulation of optical phenomena in atmospheric clouds and fogs. Russ. J. Numer. Anal. Math. Modelling, 2020, V.35, No.6, P.367–375

Abstract — In this paper, we present algorithms for fast computation of phase functions of atmospheric clouds and for stochastic simulation of such optical phenomena as fogbows, glories, coronas and halos.Using the developed numerical algorithms and software we analyze optical phenomena for several cloud and fog models..

Keywords: numerical simulation, radiation transfer, clouds, phase functions, optical phenomena, Monte Carlo methods

DOI: 10.1515/rnam-2020-0030 (WoS, SCOPUS)

[10] A V Zakovryashin and S M Prigarin 2021 Computer simulation of coronas, glories and fogbows in atmospheric clouds and fogs. J. Phys.: Conf. Ser. 1715 012024

DOI: 10.1088/1742-6596/1715/1/012024 (SCOPUS)

▲ The software is free. Please, cite the software when you use it in your work.

▲ Please, inform us about successful application of the software.

▲ The software is still under development. Any feedback is highly appreciated. Please, send your remarks to Sergei M. Prigarin [send e-mail] or to the authors of the corresponding software

☼ The research was partially supported by RFBR (15-01-00783, 16-01-00145, 16-31-00038, 18-01-00609, 19-31-90104).

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