An up slope wind due to local surface heating. Opposite of katabatic wind.

An instrument which indicates the presence of dust particles in the atmosphere. Also spelled coniscope.

An instrument used for measuring the specific gravity of a liquid.

A semiconductor which exhibits rapid and extremely large changes in resistance for relatively small changes in temperature.

A number of quantity defining a limit that errors will not exceed when a device is used under specified operating conditions. Accuracy rating can be expressed in a number of forms, i.e. in terms of the measured variable (+/- 1 C), percent of span (+/-0.5% ...

Based upon damage patterns, classifies twisters into six categories of wind speed (F0 thru F5), ranging from 40 to 318 mph estimated wind speed.

Same as freezing point.

Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.

Solar and terrestrial radiation directed downwards (towards the earth's surface); incoming radiation.

A set of rules or conventions used to standardize data transfer between devices.

The distance that an observer can see vertically into a surface-based obscuring phenomenon such as fog, rain, or snow. The distance estimate must be based upon ceiling balloon ascensions or ceiling light projector measurements.

A type of climatic diagram whose coordinates are some form of temperature vs. a form of humidity or precipitation.

An instrument for measuring differences in electric potential.

Wind with a speed between 22 and 27 knots (25 and 31 mph); Beaufort scale number 6.

Emission or transfer of energy in the form of electromagnetic waves or particles.

The quantity to be measured (or modulated, or detected, or operated upon) which is received by an instrument. Thus, for a thermometer. temperature is the input quantity.

The temperature registered by a thermometer with its bulb at the level of the tops of the grass blades in short turf.

A thermoelectric thermometer used for measuring air temperature. The name is derived from the fact that the reference thermocouple is placed in an insulated bottle.

A device, similar to a phytometer, for measuring transpiration. It consists of a small vessel containing water and sealed so that the only escape of moisture is by transpiration from a leaf, twig, or small plant with its cut end inserted in the water.

A direct-vision nephoscope which is constructed in the following manner: a comb consisting of a crosspiece containing equispaced vertical rods is attached to one end of a column eight to ten feet long and is supported on a mounting that is free to rotate ...