According to the University of Delaware, the phrase, “a blanket of snow” is more than a visual description-it is also accurate in terms of warmth. Freshly fallen, un-compacted snow is typically 90-95 % trapped air.
Because the air can barely move, heat transfer is greatly reduced, thus slowing the flow of heat from the warm ground to the cold air above. This blanket effect makes snow an excellent insulator for gardens and landscapes. Through the blizzard of last weekend, a lovely blanket covered the Arboretum!