- 行业: Weather
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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 cloud unique to the genus cirrus. See cirrus intortus, cloud classification.
Industry:Weather
A cloud species unique to the genus cumulus. See cumulus humilis, cloud classification.
Industry:Weather
A cloud consisting entirely of ice crystals (such as cirrus); to be distinguished in this sense from water clouds and mixed clouds. Ice-crystal clouds have a diffuse and fibrous appearance, quite different from that typical of water droplet clouds, resulting from growth in much weaker updrafts and different fall speeds of a wider size particle spectrum.
Industry:Weather
A closed circulation in a vertical plane in which the rising motion occurs at lower potential temperature than the descending motion, thus forming an energy sink. See direct cell.
Industry:Weather
A clock-driven instrument mount that automatically and continuously points in the direction of the sun. It is used with a pyrheliometer when continuous direct solar radiation measurements are required.
Industry:Weather
A class of problems that have solutions determined by time integration of a set of differential equations from some initial state. For example, the equilibrium state of a damped linear system can be obtained by time- integrating the governing set of equations until a steady state is reached. A short-term NWP forecast is another example of an initial-value problem. See transient problem; compare boundary-value problem.
Industry:Weather
A circulation similar to a sea breeze, except not at a shore. The inland sea breeze is a very weak thermal circulation caused by temperature contrast between different land surfaces and is sometimes observed between cool irrigated farm land and neighboring dry desert land. This phenomenon is observed only when the synoptic-scale winds are very light.
Industry:Weather
A chart or function describing the temporal distribution of precipitation during a storm event, at a point, or over an area.
Industry:Weather
A chart of atmospheric-pressure difference between two selected isentropic surfaces (surfaces of constant potential temperature); the greater the pressure difference the greater the weight of the air column separating the two surfaces. Compare isentropic thickness chart; see isentropic chart.
Industry:Weather
A chart indicating the change in height of a constant-pressure surface over a specified previous time interval; comparable to a pressure-change chart. See height-change line.
Industry:Weather
