Observations and simulations of some divergent-light halos

Area of Science:

• Atmospheric optics
• Computational physics

Background:

• Halos are optical phenomena caused by light interacting with ice crystals.
• Previous halo simulations often assume parallel light, limiting their accuracy for nearby light sources.

Purpose of the Study:

• To develop and validate a simulation method for halos generated by divergent light.
• To analyze how divergent light affects halo characteristics.
• To create a comprehensive atlas of simulated halos.

Main Methods:

• Developed a novel simulation technique to model divergent light interactions with ice crystals.
• Tested the simulation method against documented halo observations.
• Generated a simulation atlas showcasing halos under varied conditions (crystal shape, light elevation, observer distance).

Main Results:

• The simulation method accurately reproduces observed halo features under divergent light.
• The study presents a diverse "simulation atlas" of halos.
• The method supports three-dimensional visualization of halo phenomena.

Conclusions:

• The proposed simulation method effectively captures the complexities of divergent-light halos.
• This work provides a valuable tool for studying and visualizing halo phenomena in atmospheric optics.