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.
late 14c., righteous in the eyes of God; upright, equitable, impartial; justifiable, reasonable, from Old French juste just, righteous; sincere (12c.), from Latin iustus upright, equitable, from ius right, especially legal right, law, from Old Latin ious, perhaps literally sacred formula, a word peculiar to Latin (not general Italic) that originated in the religious cults, from PIE root *yewes-law (cf. Avestan yaozda-make ritually pure; see jurist).