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	準地衡風オメガ方程式	地衡風
分野	気象学	気象学
系統	Process / pipeline	Process / pipeline
提唱年	1970s	1857
提唱者	Trenberth, Omaga	Buys Ballot, Coriolis
種類	Diagnostic equation for vertical motion	Wind balance principle
原典	Holton, J. R. (2004). An Introduction to Dynamic Meteorology (4th ed.). Academic Press.	Holton, J. R. (2004). An Introduction to Dynamic Meteorology (4th ed.). Academic Press.
別名	QG omega equation, Quasi-geostrophic dynamics, Vertical motion prediction	Geostrophic wind, Geostrophic balance, Geostrophic approximation
関連	3	3
概要	The quasi-geostrophic (QG) omega equation is a fundamental diagnostic equation in synoptic meteorology that relates vertical motion (omega = dP/dt) to horizontal temperature and vorticity fields. It predicts where air rises and sinks based on the geostrophic flow structure without explicitly solving for vertical velocity.	Geostrophic wind balance is a fundamental concept in meteorology that describes the balance between the pressure gradient force and the Coriolis force in large-scale atmospheric flow. When this balance is achieved, wind blows parallel to isobars without acceleration—a condition observed in the free atmosphere away from the equator and surface boundary layer.