Thermals occur when the ambient temperature starts to change, typically in the morning and the evening. … In the evening as the sun dips behind the trees, the higher air starts to cool and sink. During both events, the thermal carries your scent. These shifting air currents have implications for hunters.

How do thermals carry scent?

A thermal is a column or stream of rising air created by temperature differences between air at ground level and air higher in the atmosphere. … Air cools and settles back toward the ground, pulling your scent along with it.

Does scent go up or down?

This is because the compounds you are smelling are entering the air, making their way up your nose, to your olfactory system. So, from this perspective it rises.