Lowitz Arc - Slovenia

Last updated on September 16, 2023

The Lowitz Arc: A Rare Atmospheric Phenomenon in Slovenia

Have you ever looked up at the sky and noticed something unusual? The atmospheric optics phenomenon known as the Lowitz Arc is a rare and captivating sight that can be observed in certain conditions. In this article, we will delve into the details of the Lowitz Arc, specifically its occurrence in Slovenia.

What is the Lowitz Arc?

The Lowitz Arc is an optical phenomenon that appears as a faint arc curving upwards from a sundog towards the 22° halo region. It is considered an upper arc and is often seen in conjunction with other atmospheric optical displays, such as the Parry arc. The Lowitz Arc gets its name from the German physicist Johann von Lowitz, who first described it in 1790.

Observing the Lowitz Arc in Slovenia

Slovenia, a picturesque country in Central Europe, has been fortunate to witness the mesmerizing display of the Lowitz Arc. One such observation was made by Samo Smrke in the Prekmurje region of Slovenia on September 29th, 2006. Smrke captured an image of the Lowitz Arc, showcasing its faint appearance and its connection to the sundog and the 22° halo region.

Enhancing the Visibility and Colors

In order to better visualize the Lowitz Arc, various techniques can be employed. One such technique is unsharp masking, which enhances the clarity of the arc and brings out its colors. By applying this method, observers can discern the intricate details of this rare atmospheric phenomenon.

Additionally, embossing can be utilized to further enhance the visibility of the Lowitz Arc. However, it is important to note that this technique carries the risk of introducing artifacts into the image. Despite this potential drawback, embossing can provide a clearer view of the arc, aiding in its identification and analysis.

Possible Overlap and Identifying the Lowitz Arc

In some instances, the brightness of the central section of the Parry arc may overlap with the Lowitz Arc, leading to confusion in identification. Careful observation and analysis are required to differentiate between the two phenomena. It is worth noting that the presence of streaky clouds below the parhelion can hinder a positive identification of the lower Lowitz arc.

The Complexity of Atmospheric Optics

The study of atmospheric optics is a fascinating field that uncovers the mysteries behind the optical phenomena we witness in the sky. The Lowitz Arc is just one example of the captivating displays that can occur due to the interaction of light with ice crystals in the atmosphere. Understanding these phenomena requires a combination of scientific knowledge, observation skills, and technological advancements.

Conclusion

The Lowitz Arc is a rare and enchanting atmospheric optical phenomenon that has been observed in Slovenia. Its faint appearance and association with other atmospheric displays make it a captivating sight for those lucky enough to witness it. By employing techniques such as unsharp masking and embossing, observers can enhance the visibility and colors of the arc, aiding in its identification and analysis. As we continue to explore the wonders of atmospheric optics, we uncover the complexities and beauty of our natural world.

Upper Lowitz arcs Slovenia. Samo Smrke saw this display on 29th September '06 in the Prekmurje region of Slovenia. ©Samo Smrke, shown with permission.

An upper Lowitz arc is faintly visible in the unenhanced image curving upwards from the sundog towards the 22° halo region. The brightness of the central Parry arc section could also be produced by overlap with the Lowitz arc.

After unsharp masking (2) the arc becomes clearer, even the colours are apparent.

Embossing (3) enhances the arc further at the risk of adding artifacts. This view might be thought to reveal a lower Lowitz arc but the streaky clouds below the parhelion hinder a positive identification.

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Reference Atmospheric Optics

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