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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, ...
Name given to cold northerly, northeasterly, or easterly, postfrontal winds in the Swiss Middleland (the region between the Jura and the Alps) and in various regions of eastern France. The bise is typically driven by an anticyclone building to the northwest or north of the Alps. According to Wanner and Furger (1990), “the cold air flow from the north and northeast is channeled between the Jura and the Alps and leads to the formation of the bise over the Swiss Middleland and the upper Rhône Valley. Thus, the bise is normally a postfrontal phenomenon and is closely connected with the advection of cold and dry continental air. Typically the classic bise endures about one to three days. ” The bise is most frequent in spring, when it usually brings fine, bright weather. In winter a special case of the bise occurs when the pressure gradient is produced by a Mediterranean cyclone system to the south of the Alps, bringing moist air in from the Balkans. Accompanied by heavy clouds, snow whirlwinds in the mountains, and rain, snow, or hail, this wind is called a “black bise” (bise noire in Switzerland and Saône in east central France; bise nègre in Aveyron in south central France). In spring the bise can last for several days and bring damaging frosts. In the Morvan in east central France the very dry bise in March is termed hale de mars (drying wind of March). In the Drôme Valley southeast of Valence (southeast France) the name bise brume is given to a moist, mild, and sometimes foggy wind from the northwest.
Industry:Weather
Name given to cold northerly, northeasterly, or easterly, postfrontal winds in the Swiss Middleland (the region between the Jura and the Alps) and in various regions of eastern France. The bise is typically driven by an anticyclone building to the northwest or north of the Alps. According to Wanner and Furger (1990), “the cold air flow from the north and northeast is channeled between the Jura and the Alps and leads to the formation of the bise over the Swiss Middleland and the upper Rhône Valley. Thus, the bise is normally a postfrontal phenomenon and is closely connected with the advection of cold and dry continental air. Typically the classic bise endures about one to three days. ” The bise is most frequent in spring, when it usually brings fine, bright weather. In winter a special case of the bise occurs when the pressure gradient is produced by a Mediterranean cyclone system to the south of the Alps, bringing moist air in from the Balkans. Accompanied by heavy clouds, snow whirlwinds in the mountains, and rain, snow, or hail, this wind is called a “black bise” (bise noire in Switzerland and Saône in east central France; bise nègre in Aveyron in south central France). In spring the bise can last for several days and bring damaging frosts. In the Morvan in east central France the very dry bise in March is termed hale de mars (drying wind of March). In the Drôme Valley southeast of Valence (southeast France) the name bise brume is given to a moist, mild, and sometimes foggy wind from the northwest.
Industry:Weather
A crescent-shaped dune or drift of windblown sand or snow; the arms of the crescent point downward. Conditions under which barchans form are a moderate supply of material (sand or snow), and winds of almost constant direction and of moderate speeds.
Industry:Weather
Calibration or quality assurance of radiosonde sensors before flight by comparison of radiosonde measurements with those from other instruments.
Industry:Weather
In the Philippine Islands, the name given to any severe tropical cyclone; derived from the city of Baguio, where a record 24-h rainfall of 46 inches occurred during the passage of a tropical cyclone in July 1911.
Industry:Weather
Calibration or quality assurance of radiosonde sensors before flight by comparison of radiosonde measurements with those from other instruments.
Industry:Weather
That part of the lithosphere that, because of the fluctuations of the water table, lies part of the time in the zone of saturation and part of the time in the overlying zone of aeration.
Industry:Weather
In southern Japan and in parts of China, the name of the season of heaviest rainfall. The bai-u season (June and early July in Japan, May to July in China) is the most important period for the cultivation and transplanting of rice. The bai-u rains are also called plum rains or mold rains, with reference to the season when plums ripen and to the effects of continued dampness.
Industry:Weather
During clear twilights, a faintly glowing band that is visible above the solar point when the sun's elevation −7° < h0 < −18° (the lower limit may occur at h0 > −18°). This band's azimuthal width is ∼20°–30°, but its vertical or elevation-angle width is only a few degrees. The bright segment follows the disappearance of the purple light and can persist until the end of astronomical twilight. During clear nautical and astronomical twilights, the bright and dark segments comprise the entire sky. See also afterglow.
Industry:Weather
In southern Japan and in parts of China, the name of the season of heaviest rainfall. The bai-u season (June and early July in Japan, May to July in China) is the most important period for the cultivation and transplanting of rice. The bai-u rains are also called plum rains or mold rains, with reference to the season when plums ripen and to the effects of continued dampness.
Industry:Weather
