- 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, ...
The ratio of the actual amount of precipitation collected at a specific place, during a specific month, to the amount that would have been obtained if the mean annual amount had been equally distributed over every day of the year.
Industry:Weather
The ratio of specific heat (''C<sub>p</sub>'') of moist air at constant pressure to latent heat (''L<sub>v</sub>'') of vaporization of water. This constant has a value of γ = ''C<sub>p</sub>''/''L<sub>v</sub>'' ≅ 0. 4 (g''<sub>water</sub>''/kg''<sub>air</sub>'') K<sup>−1</sup>. Latent heat flux, when multiplied by this constant, yields a moisture flux.
Industry:Weather
The range of stabilities organized in categories designed to provide semiquantitative measures of the mixing capabilities of the lower atmosphere; usually termed the Pasquill– Gifford categories.
Industry:Weather
The rate of change in time of discharge and water surface elevations during spring snowmelt.
Industry:Weather
The rate of decrease of the temperature of an air parcel as it is lifted, −''dT''/''dz'', or occasionally ''dT''/''dp'', where ''p'' is pressure. The concept may be applied to other atmospheric variables, for example, the process lapse rate of density. The process lapse rate is determined by the character of the fluid processes and should be carefully distinguished from the environmental lapse rate, which is determined by the distribution of temperature in space. In the atmosphere the process lapse rate is usually assumed to be either the dry-adiabatic lapse rate or the moist-adiabatic lapse rate.
Industry:Weather
The radius of the circle within which a lightning discharge will not strike due to presence of an elevated lightning rod at the center. A rule of thumb is that this radius is equal to the height of the rod, though cases of lightning damage inside this distance are well established.
Industry:Weather
The rather shallow, irregular, and diffuse easterly winds located poleward of the subpolar low pressure belt. In the mean in the Northern Hemisphere, these easterlies exist to an appreciable extent only north of the Aleutian low and the Icelandic low.
Industry:Weather
The rate, often expressed in watts, at which energy is exchanged or transmitted. In radar it usually refers to the rate at which electromagnetic energy is radiated from or received at the antenna.
Industry:Weather
The rate of precipitation, usually expressed in millimeters or inches per hour.
Industry:Weather
