"A Frost Diversion Arc deflects frost. It is on a hill, with the highest point at the top and sides going around the plants that need protection. As cold air drains down the hill it flows to either side of the arc. When it reaches the bottom of the hill it pushes warmer air up into the arc to those plants that need it most. If the slop is northerly facing ((Aussie book, flip for norther hemisphere)) the arc can double up as a sun trap. Sun traps increase and store heat in the soil, water and structures with a high thermal mass. This also helps prevent frost." Pg112
Rob S. aka Blitz wrote:
Im curious as to what altitude you all are at that you get this reversal?