The name Angela is a French baby name. In French the meaning of the name Angela is: Angel. Spanish Meaning: The name Angela is a Spanish baby name. In Spanish the meaning of the name Angela is: Angel.he name Angela is a French baby name. In French the meaning of the name Angela is: Angel. Spanish Meaning: The name Angela is a Spanish baby name. In Spanish the meaning of the name Angela is: Angel.
âA trough is an elongated area of low atmospheric pressure that can occur either at the Earth's surface or at higher altitudes.â âIn southwestern Australia, the hottest conditions are normally associated with low pressure troughs that direct east to northeasterly winds from the hot interior.â
Troughs will indicate where the pressure level is lowest and ridges will indicate where the pressure level is highest in elevation. Ridges are associated with warm air and troughs are associated with cold air. If you flew from a trough to a ridge you would have to increase altitude to stay on constant pressure.