Pretty leaf frost patterns on a car windscreen in Aberdeen. Photo taken by miss-singsong. For frost to form, the temperature of the surface must be below freezing. But what causes pretty, leaf ...

To see how frost changed with humidity, the researchers cooled the surface to −30°C and placed it in a sealed chamber. They then introduced nitrogen gas with a water vapour content of 14%, 24% or 34%.

Weather patterns' influence on frost timing. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2017 / 05 / 170523083724.htm. University of Utah.

What causes different frost patterns? Image source, BBC Weather Watcher / miss-singsong. Image caption, Pretty leaf frost patterns on a car windscreen in Aberdeen. Published. 24 September 2024.

Atmospheric circulation patterns, they found, were the dominant influence on frost timing, although the trend of globally warming temperatures played a part as well. Advanced Search Home ...

For frost to form, the temperature of the surface must be below freezing. But what causes pretty, leaf-like patterns to form, as opposed to just a sheet of frost?