- 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 irradiance per unit wavelength or wavenumber interval. Units are typically W m<sup>−2</sup> μm<sup>−1</sup> or W m<sup>−2</sup>(cm<sup>−1</sup>)<sup>−1</sup>.
Industry:Weather
The Lagrangian drift associated with irrotational surface gravity waves. See Stokes's drift velocity.
Industry:Weather
The last two million years of geologic time, comprising the Pleistocene and Holocene glacial epochs. Estimates of the date of the beginning of the Quaternary vary between 2. 5 and 1. 6 million years ago.
Industry:Weather
The layer of ground above permafrost; it includes the active layer and possibly occurrences of talik and pereletok.
Industry:Weather
The length of time required for forcing effects such as wind to induce velocities and/ or vorticities of (''e'' − 1)/''e'' = 63. 2% of the value obtained at long times. This characterizes the time required for forcing to be felt and is usually the same as the spindown time.
Industry:Weather
The least radial separation between two targets in the same direction from a radar that allows them to be distinguished. This separation equals one-half the transmitted pulse length. Targets closer together than this distance are not resolved and appear as a single target on the display. See radar resolution.
Industry:Weather
The leading edge of a gust front that is filled with suspended sand particles as is often associated with thunderstorm winds over desert regions. The sand wall is the leading edge of the haboob, and looks like a knobby, dun-colored wall of turbulent air. See saltation, aerosol, airborne particulates, downburst.
Industry:Weather
The intermittent landward flow of water up a beach face driven by the action of breaking waves; the opposite of backwash.
Industry:Weather
The interval of time elapsed between the beginning and ending of a rainfall event.
Industry:Weather
The interaction between disturbances in the stratosphere and those in the troposphere. The interaction can take the form of dynamic forcing and/or an exchange of mass.
Industry:Weather
