Termistörit

Termistörit is a Finnish term referring to a specific type of ice formation that can occur on bodies of water, particularly in coastal or archipelago regions. The term literally translates to "frost ridges" or "ice ridges." These formations are characterized by the buildup of ice into elevated, often jagged or irregular, mounds and ridges.

Termistörit typically form when wind and water currents interact with the initial freezing process. As water begins to freeze, wind can push newly formed ice sheets against each other or against shorelines and obstacles. This pressure causes the ice to buckle, break, and pile up, creating the ridged structures. Waves can also play a role, breaking up ice and then refreezing it into these formations.

The size and complexity of termistörit can vary greatly, from small, low ridges to extensive, several-meter-high formations. They are a common sight during the winter months in Finland's numerous lakes and coastal areas. These ice ridges can pose challenges for navigation and ice fishing, requiring specialized knowledge and equipment for safe passage or access. The presence of termistörit is a natural phenomenon influenced by meteorological and hydrological conditions.