But convection currents are ultimately at the mercy of temperature differences because these are what create pressure differences in the first place. The pressure difference between two locations is called a pressure gradient, and the force that actually moves air as wind is called the pressure gradient force.
oÂ·nus. n. 1. A difficult or disagreeable responsibility or necessity; a burden or obligation. 2. Responsibility for an error or fault; blame: Each side wants to avoid the onus of having started the disagreement. 3.
In ancient Roman religion and myth, Janus (/ËdÊeÉªnÉs/ ; Latin: Ianus, [ËjaË.nus]) is the god of beginnings and transitions, and thereby of gates, doors, doorways, passages and endings. He is usually depicted as having two faces, since he looks to the future and to the past.. Grimal considers Janus as a conflation of a Roman god of doorways and an ancient Syro-Hittite uranic cosmogonic god. The Roman statue of the Janus of the Argiletum, traditionally ascribed to Numa, was possibly very ancient, perhaps a sort of xoanon, like the Greek ones of the 8th century BC.