- Industry: Weather
- Number of terms: 60695
- Number of blossaries: 0
- Company Profile:
The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
A tropical cyclone with a closed wind circulation and maximum surface winds up to 17 m s<sup>−1</sup> (34 knots).
Industry:Weather
A transducer for converting thermal energy directly into electrical energy. It is composed of pairs of thermocouples that are connected either in series or in parallel. The output voltage of N pairs of series-connected thermocouples is N times the voltage developed by a single pair, while the current developed by N pairs of parallel connected thermocouples is N times the current developed by a single pair. Thermopiles are used in thermoelectric radiation instruments when the output of a single pair of thermocouples is not large enough. See moll thermopile, pyrheliometer.
Industry:Weather
A thermometer, used in aircraft, that automatically corrects for adiabatic and frictional temperatures rises by imparting a rotary motion to the air passing the thermal sensing element. By proper design of the vortex-forming chamber, the true free-air temperature can be obtained over a wide range of air speeds.
Industry:Weather
A thermally stratified layer with a location in the water column that changes with time. Transient thermoclines are formed during daytime periods and are subsequently mixed down to the permanent or main thermocline.
Industry:Weather
A theoretical limit to the windspeed of a tornado, based on the assumption of a tornado core with the thermodynamic characteristics of the pseudoadiabatic lapse rate and hydrostatic balance. The thermodynamic speed limit may be expressed in terms of CAPE as (2 CAPE)<sup>1/2</sup>, where CAPE is the convective available potential energy. The thermodynamic speed limit is often exceeded, illustrating that nonhydrostatic effects are important.
Industry:Weather
A term used to distinguish ozone present in the troposphere from the more commonly talked about stratospheric ozone layer. Tropospheric ozone results from transport from the stratosphere and from photochemical production (oxidation of carbon monoxide, methane, and other hydrocarbons). In remote regions of the troposphere, production and loss of ozone are nearly in balance, while in regions impacted by anthropogenic NO''<sub>x</sub>'' and hydrocarbon emissions, net ozone production occurs.
Industry:Weather
A term sometimes applied to the strong upward-flow air current in cumulus clouds during their stage of rapid development, often preceding a thunderstorm.
Industry:Weather
A term often used by the media to denote a zone in the Great Plains region of the central United States, often a north–south oriented region centered on north Texas, Oklahoma, Kansas, and Nebraska, where tornadoes are most frequent. Since statistics are variable on all timescales, the term has little scientific value.
Industry:Weather
A term coined by Brooks (1949) to describe a surface low pressure area in a convective storm that, with its attendant winds, has a radius of about 8–16 km and is associated with, but is larger than, a tornado. Starting with Agee (1976), the tornado cyclone has been redefined as a distinct circulation with a scale larger than that of the tornado but smaller than that of the mesocyclone (although embedded within it and smaller in scale than the mesolow). The intermediate-scale tornado cyclone is sometimes inferred from high-resolution Doppler radar observations, but at other times it is not apparent.
Industry:Weather
