Yes, snow can contain salt.
While freshly fallen snow consists primarily of frozen water, it can accumulate salt through various environmental processes. The referenced study shows that salt can migrate into snow.
How Salt Gets Into Snow
The presence of salt in snow can be attributed to several factors:
- Sea Salt Migration: According to research, sea salt can migrate upwards into snow layers. Upward migration of unfractionated sea salt to heights of at least 17 cm was observed in winter snow, leading to Cl− concentration of several hundred µM. This process can transport ions to the surface of the snow.
- Road Salting: In many regions, salt is applied to roads and sidewalks during winter to prevent ice formation. This salt can be splashed onto nearby snow or become airborne and settle on snow surfaces.
Implications of Salt in Snow
The presence of salt in snow has several implications:
- Environmental Impact: Salt runoff from melting snow can contaminate soil and water sources, harming vegetation and aquatic life.
- Corrosion: Salt accelerates the corrosion of metals, affecting vehicles, bridges, and other infrastructure.
In conclusion, while not all snow contains salt, it is possible for snow to contain salt due to natural processes like sea salt migration and human activities like road salting.
