Meteorology: All Listings RSS

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An instrument for taking photographs of an image of the sun in monochromatic light.

Category:Meteorology

Apparatus from which the nature and time of precipitation may be determined.

Category:Meteorology

An instrument for measuring the relative speed of a fluid. It consists of a concentric pipe arrangement in which the inner pipe is open at one end and the outer pipe is perforated and closed at both ends. Each pipe is connected to a manometer. The unit is ...

Category:Meteorology

A line drawn through points of equal humidity on given surface.

Category:Meteorology

Wind with a speed between 11 and 16 knots (13 and 18 mph); Beaufort scale number 4.

Category:Meteorology

A rain gauge which is placed under trees or foliage to determine the rainfall in that location. By comparing this catch with that from a rain gauge set in the open. the amount of rainfall which has been intercepted by foliage can be determined.

Category:Meteorology

A line drawn through geographical points having the same duration of sunshine (or other function of solar radiation) during a given interval of time.

Category:Meteorology

See foehn.

Category:Meteorology

A line drawn through all points on a map having the same amount of cloudiness.

Category:Meteorology

A precipitation amount of less than 0.005 inches. Also, the record made by any self-registering instrument.

Category:Meteorology

Pertaining to rain, or more broadly, to precipitation.

Category:Meteorology

A device for computing certain psychrometric data, usually the dew point and the relative humidity, from known values of the dry-bulb and wet-bulb temperatures and the atmospheric pressure. One type is the circular slide-rule form and, like the psychromet ...

Category:Meteorology

The boundary between the troposphere and stratosphere, usually characterized by an abrupt change in lapse rate. Its height varies from 10 to 20 km. Regions above the tropopause have greater atmospheric stability than regions below.

Category:Meteorology

Determination of the total amount of snow covering a watershed or a given region. Both depth and water content of the snow may be measured, and the results may be used to predict the amount of water that will be available after melting.

Category:Meteorology

A line drawn through geographical points where a given seasonal biological event occurs on the same date.

Category:Meteorology

Same as precipitation-evaporation ratio.

Category:Meteorology

The most common of the principal rainbow phenomena, which appears as an arc of about 42

Category:Meteorology

That stage, on a fixed river gauge, at which overflow of the natural banks of the stream begins to cause damage in any portion of the reach for which the gauge is used as an index.

Category:Meteorology

A small balloon whose ascent is followed by a theodolite in order to obtain data for the computation of winds aloft.

Category:Meteorology

The length of fluid flow (gas or liquid) past a sensor required for the sensor to respond to 63.2% of a step change in speed. Expressed in feet or meters. For anemometers, this value is calculated from time constant times wind tunnel speed.

Category:Meteorology