Circumhorizon Arc, New Mexico USA

Last updated on September 16, 2023

The Enigmatic Circumhorizon Arc: A Unique Atmospheric Optics Phenomenon in New Mexico, USA

Have you ever gazed up at the sky and been captivated by the mesmerizing beauty of atmospheric optics phenomena? One such phenomenon that has intrigued scientists and sky enthusiasts alike is the Circumhorizon Arc. This enigmatic optical display creates a stunning "braided" arc of colors in the sky, and it was observed in Silver City, New Mexico, USA, during August '04 by Raymon Wier.

The formation of this peculiar circumhorizon arc is believed to be influenced by the presence of plate crystals in high cirrus fibratus clouds. These thin, wispy clouds provide the perfect canvas for the intricate interplay of light and ice crystals, resulting in this awe-inspiring spectacle. While circumhorizon arcs can occur in various locations around the world, the sighting in New Mexico adds a unique touch to this already fascinating phenomenon.

To understand the science behind the circumhorizon arc, we must delve into the intricate details of its formation. It all begins with the interaction between sunlight and ice crystals within the cirrus fibratus clouds. These plate-shaped ice crystals act as tiny prisms, bending and refracting sunlight as it passes through them. This dispersion of light causes the separation of colors, similar to what we observe in a rainbow.

As the sun's rays pass through these ice crystals at a specific angle, they undergo a process known as refraction. This refraction causes the light to split into its component colors, just like a prism would. The separated colors then become visible to us as a vibrant arc in the sky. However, what sets the circumhorizon arc apart is its unique shape and orientation.

Unlike a traditional rainbow that forms a complete circle around the sun, the circumhorizon arc appears as a horizontal band stretching across the sky. Its position is parallel to the horizon, hence the name "circumhorizon." This distinctive shape occurs due to the specific angle at which sunlight enters and interacts with the plate crystals. The result is a breathtaking display of vibrant colors that seem to braid together across the sky.

The sighting of the circumhorizon arc in New Mexico adds an extra layer of intrigue to this already captivating phenomenon. The unique geographic and atmospheric conditions in the region contribute to the formation of these stunning optical displays. With its expansive skies and diverse landscapes, New Mexico provides the perfect backdrop for sky enthusiasts and photographers to capture the beauty of atmospheric optics phenomena.

If you find yourself fortunate enough to witness a circumhorizon arc, take a moment to appreciate the scientific marvel unfolding before your eyes. The intricate dance between light and ice crystals, the precise alignment of angles, and the ever-changing nature of our atmosphere all come together to create this breathtaking spectacle. It serves as a reminder of the wonders that exist in our natural world and the endless mysteries that await our exploration.

In conclusion, the Circumhorizon Arc is a remarkable atmospheric optics phenomenon that graced the skies of New Mexico, USA, in August '04. Its formation is attributed to the presence of plate crystals in high cirrus fibratus clouds, which act as prisms, refracting sunlight and creating a vibrant arc of colors. The unique shape and orientation of the circumhorizon arc set it apart from other optical displays, making it a sight to behold. New Mexico's geographical and atmospheric conditions contribute to the allure of this phenomenon, making it a must-see for sky enthusiasts and nature lovers alike. So keep your eyes on the sky, for you never know when you might witness the awe-inspiring beauty of a circumhorizon arc.

This peculiar 'braided' circumhorizon arc was possibly formed by plate crystals in high cirrus fibratus cloud.

Imaged at Silver City, New Mexico, USA during August '04 by Raymon Wier.

©Raymon Wier , shown with permission.

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