- 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, ...
In studies of the general circulation, the eddies are the departures of a field (e.g., temperature or relative vorticity) from the zonal mean of that field; the stationary eddies are the time-averaged, or time-invariant, component of the eddy field.
Industry:Weather
Group of five digits (IIiii) used in meteorological messages to identify the station of origin of an observation report. It consists of the block number (II), defining the area in which the station is located, and the station index number (iii). See international index numbers.
Industry:Weather
The trails of precipitation that emerge from the base of generating cells typically observed on time–height displays from vertically pointing radars. Snow trails are also commonly observed on range–height indicator displays. Snow trails emerge from a layer of convective instability that often exists in the middle or upper troposphere in widespread storms. Small convective cells developing within this layer produce the ice crystals that then fall to lower altitudes. The base of the convectively unstable layer is called the snow- generating level. The shape and vertical extent of the streamers depend on the vertical profiles of wind and relative humidity in the layer through which the precipitation falls.
Industry:Weather
A rise and onshore surge of seawater as the result primarily of the winds of a storm, and secondarily of the surface pressure drop near the storm center. The magnitude of the surge depends on the size, intensity, and movement of the storm; the shape of the coastline; nearshore underwater topography; and the state of the astronomical tides. The storm surge is responsible for most loss of life in tropical cyclones worldwide.
Industry:Weather
A variable, ''X''(''t''), with a value over time (or space) described by probabilistic laws.
Industry:Weather
A chemical species is said to be in steady state when the rate of its formation and the rate of its destruction are approximately equal, such that the concentration of the species remains nearly constant. The lifetime is then the atmospheric burden divided by the source or sink rate.
Industry:Weather
A chemical species is said to be in steady state when the rate of its formation and the rate of its destruction are approximately equal, such that the concentration of the species remains nearly constant. The lifetime is then the atmospheric burden divided by the source or sink rate.
Industry:Weather
A fluid motion in which the velocities at every point of the field are independent of time; streamlines and trajectories are identical. Sometimes it is further assumed that all other properties of the fluid (pressure, density, etc. ) are also independent of time. All local derivatives in the fundamental equations then vanish. A steady-state solution to a theoretical problem suggests two further questions: how the steady state came to exist (the initial-value problem), and whether it will persist (the instability problem).
Industry:Weather
