- 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 period, usually expressed in days, between the last occurrence of freezing temperatures (0°C) in the spring and the first occurrence in the autumn.
Industry:Weather
The particular geopotential surface that most nearly coincides with the mean level of the oceans of the earth. For mapping purposes it is customary to use an ellipsoid of revolution as an adequate and convenient approximation to the geoid. The dimensions and orientation of the assumed ellipsoid may represent an attempt to find the ellipsoid that most nearly fits the geoid as a whole, or they may represent an attempt to fit only a particular part of the geoid without regard to the remainder of it. When mention is made of the dimensions of the earth, reference is usually made to the dimensions of the ellipsoid most nearly representing the geoid as a whole. The actual geoid can depart from a best-fitting sphere in places by as much as 100 m.
Industry:Weather
The overflowing of the normal confines of a stream or other body of water, or the accumulation of water over areas that are not normally submerged.
Industry:Weather
The negative of the gravitational potential energy per unit mass. The gradient of the gravitational potential is the gravitational field. See gravitation; compare geopotential.
Industry:Weather
The outline of a front as seen on a vertical cross section oriented normal to the frontal surface. See profile; compare frontal contour.
Industry:Weather
The movement of a tidal current toward the shore or up a tidal river or estuary. See flood tide.
Industry:Weather
The natural process of fog disappearance, as by solar heating on sunrise or increase of winds aloft and vertical mixing with drier, warmer air.
Industry:Weather
