- 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, ...
Colloquial expression for a deposit of glaze built up on trees, shrubs, and other exposed objects during a fall of freezing precipitation; the product of an ice storm.
Industry:Weather
A dense accumulation of frazil (or lolly ice); an early stage in the freezing of a body of water. The sea surface becomes thick and soupy and sometimes greasy in appearance. Sludge depth seldom exceeds one foot. See grease ice.
Industry:Weather
Colloquial expression for a deposit of glaze built up on trees, shrubs, and other exposed objects during a fall of freezing precipitation; the product of an ice storm.
Industry:Weather
The graphic or functional relationship between sediment discharge rate (mass per unit time) in flowing water and the corresponding water discharge rate in volume per unit time or mass per unit time. The graphical relationship is called a rating curve and the functional relationship is called a rating equation or rating function. Compare capacity of the wind.
Industry:Weather
The graphic or functional relationship between sediment discharge rate (mass per unit time) in flowing water and the corresponding water discharge rate in volume per unit time or mass per unit time. The graphical relationship is called a rating curve and the functional relationship is called a rating equation or rating function. Compare capacity of the wind.
Industry:Weather
Erosion of thin layers of earth-surface material, more or less evenly, from extended areas of gently sloping land by broad continuous sheets of running water, without the formation of rills, gullies, or other channelized flow.
Industry:Weather
Erosion of thin layers of earth-surface material, more or less evenly, from extended areas of gently sloping land by broad continuous sheets of running water, without the formation of rills, gullies, or other channelized flow.
Industry:Weather
Radar echoes from the surface of the sea caused by scattering from waves, ripples, and spray.
Industry:Weather
A type of photoelectric photometer used in a method of determining high-altitude winds on the assumption that stellar scintillation is caused by atmospheric inhomogeneities (schlieren) being carried along by the wind near tropopause level. In one design a star is observed with a single telescope that looks through a four-inch long rotatable slit. Two scintillation frequencies are monitored, one high and one low. The slit is rotated until the ratio of high-frequency to low-frequency scintillation is a minimum. At this point, the slit is oriented parallel to the wind. The magnitude of the frequency ratio is a function of the wind speed. In another design, two telescopes mounted four inches apart are focused on a star. Only one frequency need be monitored. By direct observation of phase relationships as the telescopes are rotated about a mutual axis, both direction and speed can be determined with less ambiguity and uncertainty than with the single telescope type.
Industry:Weather
A type of photoelectric photometer used in a method of determining high-altitude winds on the assumption that stellar scintillation is caused by atmospheric inhomogeneities (schlieren) being carried along by the wind near tropopause level. In one design a star is observed with a single telescope that looks through a four-inch long rotatable slit. Two scintillation frequencies are monitored, one high and one low. The slit is rotated until the ratio of high-frequency to low-frequency scintillation is a minimum. At this point, the slit is oriented parallel to the wind. The magnitude of the frequency ratio is a function of the wind speed. In another design, two telescopes mounted four inches apart are focused on a star. Only one frequency need be monitored. By direct observation of phase relationships as the telescopes are rotated about a mutual axis, both direction and speed can be determined with less ambiguity and uncertainty than with the single telescope type.
Industry:Weather
