You understand that the ability of a unit of heat to do a unit of work depends fundamentally on relative temperature. (realclimate.org)
It was necessary to constantly shift the baseline otherwise we'd not be able to see ENSO events they way we would like as they are more about relative temperature differences between the equatorial Pacific and other regions rather than absolute temperatures. (climate.gov)
In terms of relative temperature increase, today's eastern and southeastern cities are more severely affected by heat waves than arid and semiarid western cities. (sciencedaily.com)