A contact anemometer connected to an electrical circuit which is so arranged that the average wind speed is indicated.

In radiometry, a measure of the intrinsic radiant intensity emitted by a radiator in a given direction.

A device used to switch electrical current at a selectable setpoint temperature.

A combination cup anemometer and pressure-plate anemometer, consisting of an array of cups about a vertical axis of rotation, the free rotation of which is restricted by a suitable spring arrangement.

A fixed support for mounting maximum and minimum thermometers of the liquid-in-glass type. The support holds the thermometers at the correct operating attitude and also permits their rotation for resetting when desired.

Same as fogbow.

A common type of terrestrial scintillation; shimmering over a hot surface (such as a roadway) on a quiet, cloudless. summer day.

A measure, proposed by Angstrom, of the precipitation effectiveness of a region.

A warm, dry wind on the lee side of a mountain range, the warmth and dryness due to adiabatic compression upon descent.

Not a linear function of the relevant variables.

See hurricane beacon.

Precipitation of white, opaque, spherical or conical ice particles that are crisp and easily crushed and that have diameters of 2 to 5 mm.

in folklore, a name for fire.

An atmometer which uses a filter paper disc as the evaporating element. The amount of water evaporated through the paper is read at the graduated tube reservoir.

Any wind blowing down an incline. If warm, it is a foehn. If cold, it may be a fall wind or a gravity wind.

The maximum positive and negative deviation observed in testing a device under specified conditions and by a specified procedure. It is usually measured as an inaccuracy and expressed as accuracy, typically in terms of the measured variable, percent of sp ...

The programs and instructions which direct a computer.

The change in a performance characteristic caused by a change in a specified operating condition from reference operating condition, all other conditions being held within the limits of reference operating conditions.

That portion of the atmosphere which is above the lower troposphere. Generally applied to levels above 850 mb.

An instrument which measures the transmissivity of the atmosphere between two points for the determination of visual range.