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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | |
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First Edition Preface Second Edition Preface Acknowledgments
Section A A index 601-609 of 917 terms
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anti-sea breeze—The return air flow aloft from land to sea that is part of the sea breeze circulation; usually observed during the day at the coast, when the land is warmer than the water. This circulation can carry air pollutants out to sea from coastal cities and industry.
anti-valley wind—See along-valley winds.
anticorona—Same as glory.
anticrepuscular arch—Same as antitwilight arch.
anticrepuscular rays—An extension of the crepuscular rays across the sky toward the antisolar point. Anticrepuscular rays seen with a rainbow or fogbow will always be radii to the bow.
anticyclogenesis—Any strengthening or development of anticyclonic circulation in the atmosphere; the opposite of anticyclolysis. This applies to the development of anticyclonic circulation (or the initial appearance of a high) where previously it was nonexistent, as well as to intensification of existing anticyclonic flow. The most common application of this term is to the formation of a new anticyclone. Care should be taken, however, to distinguish the increase in anticyclonic circulation from the increase in atmospheric pressure (filling), although they usually occur simultaneously. Compare cyclogenesis.
anticyclolysis—Any weakening of anticyclonic circulation in the atmosphere; the opposite of anticyclogenesis. Anticyclolysis (which refers to the circulation) should be distinguished from deepening (which refers to the atmospheric pressure), although the two processes usually occur together. Compare cyclolysis.
anticyclone—An atmospheric anticyclonic circulation, a closed circulation. The wind in an anticyclone is in the clockwise direction in the Northern Hemisphere and counterclockwise in the Southern Hemisphere. With respect to the relative direction of its rotation, it is the opposite of a cyclone. Because anticyclonic circulation and relative high atmospheric pressure usually coexist, the terms anticyclone and high are used interchangeably in common practice. Compare ridge.
anticyclonic bora—See bora.
anticyclonic circulation—Fluid motion having a sense of rotation about the local vertical opposite to that of the earth's rotation; that is, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere, undefined at the equator. It is the opposite of cyclonic circulation.
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