The weather is getting cold within one meter above and below the surface. Should it be frozen first or first?

Cold weather is the same as warm weather!

It is a rule from top to bottom. Because water freezes, it has several conditions:

1, and the temperature reaches a suitable low temperature value;

2. The fluidity of water is not strong;

3, there are impurities.

Melting ice is the same, temperature is a must! Therefore, the contact temperature with air is the lowest (within one meter). So the degree of contact with the air temperature determines whether it freezes or melts!