- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
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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, ...
A cgs unit of mass; originally defined as the mass of 1 cubic centimeter of water at a temperature of 4. 5°C but now taken as the one-thousandth part of the standard kilogram, a mass preserved by the International Bureau of Weights and Measures at Sevrés, France.
Industry:Weather
A cgs unit of magnetic induction (or magnetic flux per unit area across an area at right angles to the magnetic field), equal to one maxwell per square centimeter. Cgs and mks units of magnetic induction are related by 104 gauss = 1 weber m−2 = 1 Tesla (T), where 1 weber = 1 (newton meter)/amp = 1 volt s. The induction of the earth's magnetic field in the United States is of order 0. 5 gauss, with the magnetic field oriented about 20° from zenith. Magnetic induction inside superconducting magnets can be as high as 20 T (2 × 105 gauss), while magnetic induction produced by the human spine is of order 15 × 10−15 T (1. 5 × 10−10 gauss).
Industry:Weather
A center established to provide flight information and alerting services.
Industry:Weather
A British term for ice pellets (sleet). Sleet, in turn, has a different meaning in Great Britain than it does in the United States. In British terminology, sleet is precipitation in the form of a mixture of rain and snow.
Industry:Weather
A bright, transient event within the sun's chromosphere and corona. Flares produce enhanced emission at radio frequencies and in the ultraviolet and x-ray spectral regions as well. They may also produce increased particle emission, often with ions of cosmic ray energies. Flares usually appear within minutes and fade within an hour. They are localized to small areas (typically <10−3 of the solar disk) and usually occur within solar active regions.
Industry:Weather
A break in an extensive cloud deck or cloud shield, usually a band parallel to and downwind of the mountain ridge line. Especially visible in satellite pictures, this cloud-free zone results from the strong sinking motion on the lee side of a mountain barrier during a foehn or chinook.
Industry:Weather
A branch of potamology dealing with the action of forces on riverbed materials and with water flow in watercourses.
Industry:Weather
A board that holds graph paper on which is plotted information obtained from a pilot-balloon observation. The vertical scale of the board, engraved on a metal plate, is an altitude scale indicating the assumed height of the balloon at the end of each minute of flight. The horizontal scale is engraved on a movable T-square and is calibrated in units of direction and speed. The result is a curve of wind speed and direction against height.
Industry:Weather
A black-and-white image (with zero or more shades of gray between pure black and pure white). Also, the mapping relating an image level to a display level on a monochromatic display.
Industry:Weather
