LapseRate
Lapserate, typically written as lapse rate, is a term used in atmospheric science to describe how a physical quantity changes with height in the vertical direction. The most common focus is on temperature, but lapse rate can also apply to other variables such as humidity or pressure. It is defined as the vertical gradient dX/dz, where z denotes altitude.
In meteorology, the environmental lapse rate (ELR) refers to the actual rate at which air temperature decreases
Two idealized lapse rates often discussed alongside the ELR are the dry adiabatic lapse rate (DALR) and
The sign convention commonly used is that temperature tends to decrease with height, so lapse rates have