What a difference a day or two makes.
On my return to Caldbec Hill the snow had arrived.
I now surveyed a distinctly two-tone landscape.
This little tree stands like a forlorn sentinel as if watching the gathering assault of winter in the west.
Now I have heard from various sources that the snow acts like a blanket and insulates the ground from the very low temperatures of the air, due to a clear night sky. So I sought to verify this for myself by measuring the temperatures above and below the snow in my garden.
The graph below shows my results, and indeed the snow has kept the ground temperature constant, and above freezing, all through the night. Even though the minimum air temperature fell to -6°C