OPOD - Manchester Halos

Last updated on September 16, 2023

OPOD - Manchester Halos: A Captivating Display of Atmospheric Optics

Have you ever gazed up at the sky and been mesmerized by the beauty of nature's optical phenomena? One such captivating display is the Manchester Halos, which include the remarkable circumzenithal arc and the 22° halo. These atmospheric optics phenomena have been observed and documented by Anthony Cross of the Manchester Astronomical Society, England, on the 27th of November, 2010.

The Circumzenithal Arc: A Colorful Wonder in the Sky

Often referred to as the "upside-down rainbow" or the "grin in the sky," the circumzenithal arc is a stunning example of ice halos. What sets it apart is its vibrant and vivid display of colors. When sunlight enters the top faces of hexagonal plate crystals and exits through a side face, the refraction through these crystals acts like a 90° prism, causing a wide separation of colors. This refraction process results in an almost pure spectrum, making the circumzenithal arc one of the most colorful atmospheric phenomena.

A Sight to Behold: The 22° Halo

Accompanying the circumzenithal arc is another awe-inspiring phenomenon known as the 22° halo. This halo forms a perfect circle around the sun, appearing at an angle of approximately 22 degrees from its position. Created by the refraction and reflection of sunlight on ice crystals in cirrus clouds, the 22° halo is a testament to the intricate interplay between light and ice particles in our atmosphere.

When to Look Up: Ideal Conditions for Observing Manchester Halos

To catch a glimpse of these mesmerizing halos, keep an eye on the sky when the sun is low, below an angle of 32 degrees. Additionally, cirrus clouds wrapping the sky create the ideal conditions for the formation of Manchester Halos. These thin and wispy clouds, composed of ice crystals, act as the canvas on which these optical wonders are painted.

Exploring the Original Article

If you're interested in delving deeper into the topic of Manchester Halos, you can explore the original article that this content was adapted from. Please note that the article has been automatically converted from the old site and may not appear as intended. However, it provides valuable insights into the phenomenon and offers a more comprehensive understanding of Manchester Halos.

Further Reading and Resources

To expand your knowledge of atmospheric optics and delve into the world of captivating natural phenomena, there are numerous resources available. Books, online articles, and scientific publications provide a wealth of information on topics such as rainbows, halos, and other optical wonders that grace our skies. Exploring these resources can enhance your understanding and appreciation of the beauty that lies above us.

Photographs: A Window into the Enchanting Sky

Photographs capture fleeting moments of atmospheric optics phenomena, allowing us to relish their beauty long after they have vanished from the sky. The images accompanying this article, taken by Anthony Cross with permission from the Manchester Astronomical Society, provide a glimpse into the captivating display of Manchester Halos. These photographs serve as a testament to the wonders that await those who take the time to look up and appreciate the beauty of our ever-changing sky.

Sharing the Wonder: Inspiring Others to Look Up

The beauty of atmospheric optics lies not only in its visual splendor but also in its ability to inspire awe and curiosity. By sharing your experiences and knowledge of Manchester Halos with others, you can ignite a sense of wonder and encourage them to explore the captivating world of atmospheric optics. Whether through conversations, social media, or community events, spreading awareness about these natural wonders can foster a deeper appreciation for the enchanting phenomena that grace our skies.

A Reminder of Nature's Marvels

The Manchester Halos serve as a reminder of the remarkable and intricate workings of our natural world. From the refraction of sunlight through ice crystals to the formation of vibrant spectrums in the sky, these atmospheric optics phenomena highlight the beauty and complexity that surround us. By taking a moment to gaze up at the sky and appreciate the wonders above, we can cultivate a deeper connection with nature and marvel at the captivating displays that unfold before our eyes.

Embracing the Beauty Above

As we navigate our busy lives, it's easy to overlook the enchanting wonders that grace our skies. However, by taking a moment to pause, look up, and embrace the beauty above, we can reconnect with the natural world and find solace in its splendor. The Manchester Halos serve as a reminder to cherish the moments of awe and wonder that nature gifts us, allowing us to find joy and inspiration in the simplest of things. So, next time you catch a glimpse of a colorful arc or a perfect halo encircling the sun, take a moment to appreciate the magic unfolding above and let it fill your heart with wonder.

Manchester Halos

Circumzenithal arc and 22° halo sighted by Anthony Cross of Manchester Astronomical Society, England 27th November 2010. ©Anthony Cross, shown with permission.

'Upside down rainbow', 'Grin in the sky'...

The circumzenithal arc is one of the most colourful of the ice halos. It presents an almost pure spectrum as near parallel rays from the sun enter the top faces of hexagonal plate crystals and leave through a side face. The refraction through the equivalent of a 90° prism produces a wide separation of colours.

Look for it overhead whenever the sun is low ( <32°) and cirrus wraps the sky.

Note: this article has been automatically converted from the old site and may not appear as intended. You can find the original article here.

Reference Atmospheric Optics

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