The narrow zone of inclined seismic activity that extends from a trench downward into the asthenosphere. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.

    A zonal circulation of the atmosphere confined to equatorial regions and driven principally by the oceanic temperature gradient. In the Pacific, air flows westward from the colder, eastern area to the warm, western ocean, where it acquires warmth and moisture and subsequently rises. A return flow aloft and subsidence over the eastern ocean complete the cell.

    An area of rotating clouds that extends beneath a severe thunderstorm and from which a funnel cloud may appear. Also called a collar cloud.

    Transport of warm air into an area by winds.

    Clouds that form at temperatures above freezing.

    A front that moves in such a way that warm air replaces cold air.

    See occluded front.

    The region of warm air within a wave cyclone that lies between a retreating warm front and an advancing cold front.

    A low-pressure area that is warmer at its center than at its periphery. Tropical cyclones exhibit this temperature pattern.

    Warping- is a method which can overcome some of the problems of edge matching . It can also be used to resolve registration problems arising from digitizing source maps of different scales, different projections, and varying coordinate systems.