This morning, the low temperature outside the center at Sounkyo was -14°C, making it the coldest morning of the winter. It’s still -10°C even at this hour.
On such cold mornings, crystals like those shown in the photo form on the windows.
The crystals grow larger when there is a greater temperature difference between the two sides of the glass. Although we call them shimo kessho (frost crystals), their true name is madoshimo (window frost).
The feather-like crystals that appear in parts of the photo are also called shimoshida, or “frost ferns.”
This name comes from their resemblance to fern leaves. However, when we see them on windows from the inside, we know it’s going to be a very cold day.
Photo: Window frost Dec. 22
On such cold mornings, crystals like those shown in the photo form on the windows.
The crystals grow larger when there is a greater temperature difference between the two sides of the glass. Although we call them shimo kessho (frost crystals), their true name is madoshimo (window frost).
The feather-like crystals that appear in parts of the photo are also called shimoshida, or “frost ferns.”
This name comes from their resemblance to fern leaves. However, when we see them on windows from the inside, we know it’s going to be a very cold day.
Photo: Window frost Dec. 22
