Meteorological effects refer to the various phenomena that occur in the atmosphere due to changes in weather. Two of the most common meteorological effects are auroras and HALOS. Auroras are colorful light displays that occur in the night sky, usually near the poles, and are caused by charged particles from the sun interacting with the Earth's magnetic field. HALOS are circular arcs of light that appear around the sun or moon, and are caused by the refraction of light through ice crystals in the atmosphere.