Transistor-Transistor Logic.

The effect upon the measurement of rainfall caused by the presence of the rain gauge.

A device, similar to a potometer, for measuring transpiration, consisting of a vessel containing soil in which one or more plants are rooted and sealed so that water can escape only by transpiration from the plant.

Same as aneroid barometer. Holostelic means wholly made of solids, while aneroid means devoid of liquid.

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

Rate of wind movement in distance per unit time.

The scientific study of the waters of the earth, especially with relation to the effects of precipitation and evaporation upon the occurrence and character of water in streams, lakes, and on or below the land surface. In terms of the hydrologic cycle, the ...

Pertaining to the action or effect of the wind. Derived from the name of the Greek god of the winds, Aeolus.

Same as geostrophic wind level.

Any one of a family of circular arcs consisting of concentric colored bands, arranged from red on the inside to blue on the outside, which may be seen on a "sheet" of water drops (rain, fog, spray). The most common of the many possible is the primary rain ...

A unit of distance equal to 5280 feet. It is sometimes referred to as a land mile.

The record obtained from a bolometer.

A type of instrument shelter. It is a wooden box painted white with double louvered sides and mounted on a stand four feet above the ground.

Same as parhelion.

February 2nd. In American folklore, a day that is popularly supposed to provide the key to the weather for the remainder of the winter. Specifically, if the ground-hog upon emerging from its hole casts a shadow, it will return underground, thereby forebod ...

The value of atmospheric pressure to which the scale of a pressure altimeter is set so as to indicate airport elevation. The altimeter setting is included as part of an aviation weather observation.

A captive balloon used to maintain meteorological equipment aloft at approximately a constant height. The kytoon is streamlined and combines the aerodynamic properties of a balloon and a kite.

The succession of stages through which water passes on the ground and in the atmosphere: evaporation from land or bodies of water, condensation to form clouds, precipitation, accumulation in the soil or in bodies of water, and re-evaporation.

A graphical representation of stage or discharge at a point on a stream as a function of time.

Instrument used to measure the amount of water evaporated from the soil surface during a given time interval.