A thermometer designed for use in measuring the temperature of sea water. One form consists of a mercury-in-glass thermometer protected by a perforated metal case. Another form consists of a mercury-in-glass thermometer surrounded by a metal case which fo ...

The total amount of water transferred to the atmosphere by evapotranspiration.

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

Ice crystal deposits formed by sublimation (conversion of water vapor directly to ice) when temperature and dew point are below freezing.

A strong wind characterized by a sudden onset, a duration on the order of minutes, and a rather sudden decrease in speed.

pattern barometer-Mercurial barometer with a fixed scale and cistern and which therefore requires only one adjustment before each reading.

Lacking a relationship to a time base or clock. In asynchronous communications, individual data characters are sent at an arbitrary rate.

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.

In a system of moist air, the ratio of the mass of water vapor to the total volume of the system. Usually expressed as grams per cubic meter (g/m3).

The audio-frequency signal transmitted by the Diamond-Hinman radiosonde when the baroswitch pen passes each fifteenth contact of the commutator, up to a number determined by the design of the commutator, and each fifth contact thereafter. This signal is t ...

An Instrument used to determine dew point.

Sir Napier Shaw's name for the approximate absolute temperature scale,

The change in barometric pressure within a specified period of time (typically 3 hours for meteorological observations).

A system of designating meteorological observing stations by number. established and administered by the World Meteorological Organization. Under this scheme, specified areas of the word are divided into "blocks" each bearing a two-number designator. Stat ...

The envelope of air surrounding the earth and bound to it more or less permanently by virtue of the earth's gravitational attraction. The system whose chemical Properties. dynamic motions, and physical processes constitute the subject matter of meteorolog ...

A cup anemometer with its shaft mechanically coupled to a magneto.

A very sensitive electrostatic electrometer for measuring small potential differences.

The process by which water in plants is transferred as water vapor to the atmosphere. Also, the amount of water so transferred.

A weakly colored lunar halo identical in form and optical origin to the solar parhelion.

A hygrometer which includes an arrangement for the time recording of atmospheric humidity.