"Pressure differential" refers to the difference in pressure between two points or areas. It indicates the contrast, or gap, in the amount of force or stress exerted. Full definition
It needs to be stressed that plant life shuts down at 150 parts per million, as plants are unable to operate with the partial pressure differential of carbon dioxide between their cells and the atmosphere. (humanevents.com)
Santa Ana winds result from a regional, large scale weather pattern caused by the atmospheric pressure differential between a Great Basin high - pressure cell and a Pacific Coast trough of low pressure. (nps.gov)
The Carnot efficiency, based on temperatures but it can be recast as pressure differentials is determined from the eye of the storm, for epsilon = 1/3 Tsubscript0 becomes 203Kelvin or -70 Celsius, which appears fine. (realclimate.org)