- 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, ...
1. One sweep of a radiometer across the area or volume being viewed. Many radiometers on satellites scan across the earth from horizon to horizon. 2. The narrow strip that is swept by the instantaneous field of view of a detector in a scanner system mounted on the ground or on a satellite or aircraft.
Industry:Weather
1. Involves the use of rainfall, flood flow, or other records at a number of sites to obtain a general description of the behavior of such phenomena in an area. Regional analyses are used to improve upon the description of the distribution of rainfall or runoff that can be obtained using only the limited records available at most sites. 2. The development of general predictive models of mean rainfall or flood flows, flood flow quantiles, or other statistics, perhaps making use of physiographic information such as altitude, drainage basin area, or channel slope.
Industry:Weather
1. In U. S. Climatological practice, the character of a day's weather when the average cloudiness, as determined from frequent observations, has been from 0. 4 to 0. 7 for the 24-hour period. Compare clear, cloudy. 2. In popular usage, the state of the weather when clouds are conspicuously present but do not completely dull the day or the sky at any moment. In weather forecast terminology, this term may be used when the expected cloudiness is from about 0. 3 to 0. 6.
Industry:Weather
1. In the transfer of a single-frequency signal from one point to another in a system, the time delay of a part of the wave identifying its phase. 2. The difference in phase between one signal and another.
Industry:Weather
1. In surface weather observations, usually expressed as centimeters or inches of snow depth per six-hourly period. 2. The accumulation of snow during a specified period of time.
Industry:Weather
1. In surface water hydrology, discharge per unit area of an upstream watershed. 2. In open channel flow, discharge per unit width of channel. 3. In groundwater, the volumetric flow rate per unit area of a porous media, also known as flow velocity or specific flux; if computed using Darcy's law, known as Darcy's flux.
Industry:Weather
1. In science generally, a permanent or temporary location where scientific observations and measurements are made. In meteorology, several types of stations are officially defined, including first-order station; first-order climatological station; second-order station; second-order climatological station; third-order climatological station; climatological substation; ocean weather station. 2. In oceanography, the geographic location at which any set of oceanographic observations was taken; also, the observations recorded at the location. The appropriate verbal phrase is “occupy a station. ” See'' also'' serial station; Compare ocean station, ocean weather station.
Industry:Weather
1. In referring to vehicles for scientific research and/or observation, the dimensions (often only the weight) of the scientific equipment carried by a rocket, aircraft, ship, etc. This usually includes sensors, data storage and telemeter gear, and instrument power supply, and sometimes includes special auxiliary equipment and recovery gear. 2. The environmental sensors and instruments carried on an aircraft, rocket, or satellite.
Industry:Weather
1. In radio, a measure of the received radio frequency power; generally expressed in decibels relative to some standard value, normally either one milliwatt or that power that would have resulted at the same distance under free space transmission. Could also be applied to the strength of an optical signal transmitted or received by a lidar or an acoustic signal transmitted or received by a sodar. The term field strength is commonly used as a synonym. 2. In radar, the strength of the received signal, usually expressed in logarithmic power units, in particular decibels relative to 1 mW, that is, dBm.
Industry:Weather
1. In radiation, the net flux of radiation into or out of a system. As a consequence of radiative forcing there must be some change to the nonradiative energy states of the system (e.g., its temperature may change). 2. In climatology, a systematic perturbation to the climatological value of the net radiant flux density at some point in the earth's climate system. For example, this perturbation may be due to a change in concentration of the radiatively active gases, a change in solar radiation reaching the earth, or changes in surface albedo.
Industry:Weather
