OPOD - Ottawa Dawn Pillar

Last updated on September 16, 2023

OPOD - Ottawa Dawn Pillar: A Spectacular Atmospheric Phenomenon

Have you ever witnessed a breathtaking sunrise with an unexpected twist? In the early morning hours of October 20th, Nancy Smith captured a remarkable sight over Ottawa, Ontario, Canada: a mesmerizing sunrise pillar. This captivating atmospheric phenomenon is caused by myriad plate-like ice crystals reflecting sunlight towards the observer, collectively creating the appearance of a tall, vertical pillar.

To understand how a dawn sun pillar forms, we must delve into the intricate workings of ice crystals in the atmosphere. These crystals, suspended in the air, act as tiny mirrors that redirect sunlight towards our eyes. The collective effect of these reflections creates the illusion of a pillar stretching upwards into the sky. The elongated shape of the pillar is a result of the crystals' wobbling motion as they tumble through the air.

Interestingly, the height of the pillar is directly influenced by the magnitude of the crystals' wobble. The greater the wobbling motion, the taller and more prominent the pillar becomes. When it comes to cloud formations, larger and imperfect crystals that resemble snowflakes tend to exhibit the most significant wobbling, resulting in pillars of greater height and visual impact.

In colder weather conditions, a particularly dazzling variant of the dawn sun pillar can be observed. During these times, low-level crystals known as diamond dust shimmer and glint in the sunlight, producing even brighter and more radiant pillars. The combination of cold temperatures and these tiny ice crystals creates an enchanting display that adds an extra layer of awe to the already stunning sunrise scene.

This incredible phenomenon can often be witnessed during the transitional hours between night and day, when the sun is just beginning to rise above the horizon. The interplay between light and ice crystals in the atmosphere transforms a seemingly ordinary sunrise into a spectacle of nature's artistry. It serves as a reminder of the beauty and complexity that exists within our atmosphere, waiting to be discovered and appreciated.

Intriguingly, the Ottawa dawn pillar captured by Nancy Smith serves as a testament to the wonders that can be found in our everyday surroundings. It reminds us to keep our eyes open to the unexpected marvels that nature presents, even in the most ordinary of moments. This particular sunrise pillar serves as a vivid example of the extraordinary beauty that can be found in the skies above us, if only we take the time to look up and appreciate it.

As with many atmospheric optics phenomena, understanding the science behind the Ottawa dawn pillar adds another layer of appreciation to its visual splendor. By unraveling the intricate dance between sunlight and ice crystals, we gain a deeper understanding of how these enchanting displays come to be. It is through this understanding that we can truly grasp the magnificence of nature's handiwork and find ourselves in awe of the world around us.

In conclusion, the Ottawa dawn pillar is a captivating atmospheric phenomenon that enchants and captivates all who are fortunate enough to witness it. The interplay between sunlight and ice crystals creates a mesmerizing display that transforms an ordinary sunrise into an extraordinary spectacle. By taking the time to appreciate and understand the science behind these phenomena, we can develop a deeper connection with the natural world and find joy in its ever-present wonders. So, next time you find yourself gazing at the sunrise, remember to look closely – you never know what unexpected marvels may be waiting to reveal themselves.

Dawn Sun Pillar ~ Nancy Smith caught this sunrise pillar over Ottawa, Ontario, Canada on October 20th. ©Nancy Smith

Myriad plate-like ice crystals glint the sun towards the eye. Collectively the reflections appear as a pillar.

The crystals have to wobble to produce the elongated halo shape. The greater wobble the taller the pillar. In clouds, large imperfect crystals tending to snowflake shapes wobble most and make the best pillars.

Even brighter pillars appear in cold weather when low level crystals - diamond dust - glint the sun.

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

If you use any of the definitions, information, or data presented on Atmospheric Optics, please copy the link or reference below to properly credit us as the reference source. Thank you!