- Industry: Weather
- Number of terms: 60695
- Number of blossaries: 0
- Company Profile:
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 device used for recording water levels in rivers, lakes, or wells, with respect to time.
Industry:Weather
A device that relays electrical signals not necessarily in the same form or on the same frequency as received.
Industry:Weather
A device for measuring the height of tide. It may be simply a graduated staff in a sheltered location where visual observations can be made at any desired time, or it may consist of an elaborate recording instrument (sometimes called a marigraph) making a continuous graphic record of tide height against time. Such an instrument is usually activated by a float in a pipe communicating with the sea through a small hole that filters out shorter waves.
Industry:Weather
A device often used to sample airborne particles by passing the particle-laden air between hot and cold plates. The thermal or phoretic forces deposit the particles on the cold surface.
Industry:Weather
A device for obtaining a continuous record of stage at a point on a stream. The most common recorders consist of a float-actuated pen that traces a record on a clock- driven chart. See river gauge.
Industry:Weather
A daytime, thermally forced, along-valley component of along-valley wind systems from the direction of the plains or valley toward the mountains, produced by diurnal heating of the valley air; a daytime along-valley component of the mountain-valley wind systems encountered during periods of light synoptic or other larger-scale flow. The mechanism of the upvalley wind is as follows. Air in the valley heats faster than an equivalent vertical column of air over the adjacent plains as a result of 1) the difference in the ratio of the volume of air heated in each location to the horizontal area intercepting radiation and 2) subsidence over the middle of the valley compensating for the flow up the slopes. The more effective heating in the valley produces a pressure drop in the valley relative to the plains, and this in turn produces an upvalley wind, called the valley breeze, beginning in late morning one to four hours after sunrise. It often reaches 3–5 m s<sup>−1</sup> at the surface and >5 m s<sup>−1</sup> above the surface. Mature upvalley flows tend to fill the valley, that is, the depth of the upvalley flow is approximately equal to the depth of the valley. See Also topographic amplification factor.
Industry:Weather
A device for estimating temperature based on a known relationship of its electrical resistance to temperature. The term “thermistor” is more specific than the term “resistance thermometer” because it implies that the material has been selected for a strong temperature dependence to simplify the determination of temperature. See thermistor.
Industry:Weather
A device for converting wind energy into mechanical (windmill) or electrical energy.
Industry:Weather
A device for converting energy from one form to another. For example, a thermocouple transduces heat energy into electrical energy.
Industry:Weather
A descriptive term, used mostly in weather observing, for cumulus congestus.
Industry:Weather
