Physical Therapy Assistant Guide. Welcome to the PTA Guide, a physical therapy assistant education & career resource. We have everything you need to become a licensed PTA in your state. A few of the helpful things that you'll find here are information resources by state such as tools and info on PTA Schools, PTA license requirements, PTA Jobs, PTA salary data for states & major cities.
A dust devil in Ramadi, Iraq. Atmospheric instability is a condition where the Earth's atmosphere is generally considered to be unstable and as a result the weather is subjected to a high degree of variability through distance and time.hese indices, as well as atmospheric instability itself, involve temperature changes through the troposphere with height, or lapse rate. Effects of atmospheric instability in moist atmospheres include thunderstorm development, which over warm oceans can lead to tropical cyclogenesis, and turbulence.
Noun. 1. atmospheric phenomenon-a physical phenomenon associated with the atmosphere. cloud-a visible mass of water or ice particles suspended at a considerable altitude. physical phenomenon-a natural phenomenon involving the physical properties of matter and energy.reenhouse effect, greenhouse warming-warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth.