A colloquial term in western Australia for a squall, associated with thunder, on the northwest coast in summer.

See hydrologic accounting.

American Standard Code for Information Interchange. A standard code used to represent data using 8 bits (7 data bits and I parity bit) per character.

Similar to the spectroheliograph, but used for visual instead of photographic purposes.

The meteorological visual range, which can be estimated from the average extinction coefficient using the Koschmieder equation.

Solar radiation of selected wavelengths.

In thermodynamics, the integrating factor of the differential equation referred to as the first law of thermodynamics, In statistical mechanics, a measure of translational molecular kinetic energy (with three degrees of freedom). In general, the degree of ...

Anemometer which measures wind speed by the speed of rotation of 3 or 4 hemispherical or conical cups, each fixed to the end of a horizontal arm projecting from a vertical axis. See condenser-discharge anemometer, contact anemometer. Compare to bridled-cu ...

Any sudden and heavy rain, almost always of the shower type.

The temperature at which the liquid and solid forms of a substance may exist in equilibrium at a given pressure (usually one standard atmosphere). The true freezing point of water is known as the ice point.

Same as fogbow.

Any device or instrument for measuring salinity, especially one based on electrical conductivity methods.

A thermopile used in some types of radiation instruments. See solarimeter.

For a given location, a measure of the long-range effectiveness of precipitation in promoting plant growth. Also called precipitation-evaporation index.

An instrument which measures the scattering function of particles suspended in a medium in order to determine the visual range through the medium. See visibility meter.

A small balloon, loaded with ballast and inflated so that it will explode at a predetermined altitude, which is attached to a larger balloon.

A pointed device which indicates the amount of resistance encountered when it is forced into a material such as snow or soil. See ram penetrometer.

A pyrheliometer of the bimetallic type used to measure the intensity of direct solar radiation.

Dihydrogen oxide, molecular formula H2O.

A particular pattern of snow sampler having an internal diameter of 1.485 inches so that each inch of water in the sample weighs one ounce.