The temperature that a parcel of air at height z at temperature T would have if it were brought adiabatically to mean sea level. The gradient, dè/dz, is defined such that it equals the vertical gradient of actual temperature, dT/dz, plus 1 C/100 m. Therefore, in a neutral atmosphere, the vertical gradient of potential temperature is 0.0 C/100 m.
Notice: The AIChE website is undergoing an ecommerce system upgrade to better serve you. Between 7 a.m. (EST) Friday, December 6 and 9 a.m. (EST) Monday, December 9 you will not be able to purchase or renew any AIChE products or services through the website. Customer Service phone lines are open 9 a.m. to 5 p.m. Monday through Friday... Learn more