by Woods Walker » Sun Nov 21, 2010 6:08 am
Thermals are how the warming and cooling of the air by the rising and setting of the sun affect your hunting. They are pretty much a concern on calm days, as when there's any real wind they are a non-factor.
That would mean that in the morning as the sun rose and warmed the air, that air would rise. In this case you would want to be higher up on the hillside. In the afternoon it would be reversed.
HOWEVER.......
If you get to you stand well before daylight, and it's a damp night, your scent may actually still travel DOWN the slope and pool in the valley before rising as the sun came up and warmed the air. The same thing can happen in the afternoon if you get to your stand while the afternoon air is still rising, and then it starts back down the hill as the sun sets and it cools the air. A lot of this depends on the terrain and other physical features of the particular area that you are hunting, along with the local wind and humidity levels. When I treestand hunted a lot, going into my stand real early was actually a handicap on some mornings, because my scent would pool at the bottom of the tree if the atmospheric conditions were right, and not rise and get above the deer until after the sun rose.
When I scout in the off season, I will use colored smoke bombs in various areas to learn how the thermals work in those areas. They can teach you a lot about what you thought you already knew had down pat.
Hunt Hard,
Kill Swiftly,
Waste Nothing,
Offer No Apologies.....
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NRA Endowment Life Member