- 行业: Weather
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
In France, a south wind in the center of the Massif Central and the southern Cévennes. It is warm, moist, and generally followed by a southwest wind with heavy rain.
Industry:Weather
In Egypt, a lofty whirlwind of sand resembling a pillar, moving with great velocity. See dust whirl.
Industry:Weather
In general, a climatic zone with a climate typical of equatorial and tropical regions; that is, one with continually high temperatures and with considerable precipitation, at least during part of the year. See tropical rainy climate, tropical rain forest climate, tropical monsoon climate, tropical savanna climate, megathermal climate, climatic classification.
Industry:Weather
In contrast to stationary or standing eddies, the component of the eddy field that varies with time. In this context “eddy” refers to departures from the zonal mean, such as the migratory cyclones and anticyclones in the extratropics.
Industry:Weather
In cloud physics, the process producing precipitation through collision between liquid particles (cloud droplets, drizzle drops, and raindrops). The warm rain process includes growth by collision–coalescence and limitations to growth by drop breakup. Precipitation produced by the warm rain process occurs in clouds having sufficient liquid water, updraft, and lifetime to sustain collision–coalescence growth to drizzle drop or raindrop sizes. Since warm base (>10°C) convective clouds of about 2 km depth typically have these features, the warm rain process is found to be active in both shallow and deep convection in the Tropics and midlatitudes. The major role of the warm rain process in thunderstorms is to transfer condensed water, in the form of cloud droplets, to precipitable water, in the the form of drizzle droplets and raindrops, by the collision–coalescence process. The warm rain process can also produce supercooled raindrops that freeze and become graupel, necessary for the rapid glaciation of convective tops by production of secondary ice crystals. This has been called the coalescence freezing mechanism. See Hallett–Mossop process.
Industry:Weather
In air navigation, wind direction and speed, either observed or forecast if so specified, over a fixed air route or segment of a route for a designated altitude. Compare spot wind, sector wind.
Industry:Weather
In Canadian weather terminology, the projection on the earth's surface of a tongue of warm air aloft.
Industry:Weather
In Ahlmann's glacier classification, a glacier that, at the end of the melting season, is composed of firn, and ice at the melting point.
Industry:Weather
In Australia, a dust devil. Also formerly used to denote a tropical cyclone.
Industry:Weather
