- 行业: Weather
- Number of terms: 60695
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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, ...
Acidic gas, formula SO<sub>2</sub>, formed in the combustion of many fuels and in the oxidation of naturally occurring sulfur gases. It is the primary sulfur gas emitted from combustion sources and is a precursor to sulfuric acid, which is a major constituent of acid rain.
Industry:Weather
According to Bjerknes's cyclone model, the line of convergence (corresponding to the warm front of a wave cyclone) that tends to be parallel to the direction of motion of the cyclone at the line's point of juncture with the cyclone center.
Industry:Weather
Abbreviation for various oxides of sulfur, including SO<sub>2</sub> (sulfur dioxide) and SO<sub>3</sub> (sulfur trioxide). These gaseous and solid pollutants can be transformed in the presence of water to sulfuric acid H<sub>2</sub>SO<sub>4</sub>, one of the acids in acid rain. They are formed anthropogenically by combustion of coal or coal that contains sulfur impurities. They are also produced naturally by volcanoes and by biological activity in swamps, tidal areas, oceans, and by some soil bacteria.
Industry:Weather
A zone of enhanced meridional gradients of sea surface temperature and salinity in the poleward part of the subtropical convergence. In the Southern Hemisphere, the subtropical front can be traced from 40°S at the east coast of South America across the Atlantic into the Indian Ocean and across the Great Australian Bight, where it shifts to 45°S to pass south of Tasmania and reach the southern tip of New Zealand's South Island. It continues in the Pacific Ocean from the Chatham Rise east of New Zealand near 40°S and reaches the west coast of South America near 30°S. In the Northern Hemisphere a well- developed subtropical front exists in the Pacific Ocean between 25°N, 135°E and 30°N, 140°W.
Industry:Weather
A zero-pressure balloon flying high above a very cold tropopause in tropical or summer midlatitudes. When the balloon cools and descends at night, its radiation temperature does not change, but its lift increases as it descends to the colder levels. The lost lift is overcome and the balloon floats at a lower altitude without the need for ballast. The flight altitude of the balloon is radiation- controlled.
Industry:Weather
A WMO network consisting of synoptic stations with a specified observational program satisfying minimum regional requirements that enable members to fulfill their responsibilities within World Weather Watch and in the application of meteorology.
Industry:Weather
A wind of lower speed than the gradient wind required by the existing pressure gradient and centrifugal force.
Industry:Weather
