The hypothesis here is that
the temperature- which was measured at 2 meters up in the air-
has remained at -20 ° for
the last few days, and that snow has fallen
before the ground has frosted deep. This happens often, especially
in the Koillismaa and
Kainuu- areas, where there is a thick snow cover.
Use the arrows on the right to continue until you see
an enlarged cross-section of a
snowbed. Once there, you can try how temperatures change in the
different layers of snow
and earth. You can exit this animation by clicking the "back"-button.