Joule - the derived unit of energy or work equal to 1 Newton-meter. Named for James Prescott Joule (1818-1889), a British physicist who studied heat.
Joule: A unit used to measure amounts of energy. One Joule equals 0.2389 calories.
Joules per kilogram, unit commonly used to represent CAPE and CIN.
January Thaw
A period of mild weather popularly supposed to recur each year in late January.
J/KG: Joules per Kilogram. These are the units for CAPE and CIN. See Cape and Cin.
Jet Max (or Speed Max, Jet Streak): a point or area of relative maximum wind speeds within a jet stream.
1855 joules. The kilogram calorie or large calorie (Kcal, kg-cal, or Cal) is 1,000 times as large as a calorie. Calorimeter An instrument designed to measure quantities of heat. Sometimes used in meteorology to measure solar radiation.
solar-terrestrial terms, the optimum high frequency radio wave with a 3000 km range, which reflects only once from the ionosphere (single hop transmission)M2/S2m2/s2 (meters squared per second squared), unit of measure equivalent to J/kg (joules ...
1820 - John Herapath develops some ideas in the kinetic theory of gases but mistakenly associates temperature with molecular momentum rather than kinetic energy; his work receives little attention other than from Joule.
WattUnit of power in the MKS system of units; energy per unit of time, one Joule per second (1 J/s). Abbreviated W.Wave CrestThe highest part of a waveWave HeightDistance from wave trough to wave crest.
Glossary: J's
J/KG Joules per Kilogram. These are the units for CAPE and CIN. See Cape and Cin.
Jet Max (or Speed Max, Jet Streak) a point or area of relative maximum wind speeds within a jet stream.
Observed values in thunderstorm environments often may exceed 1,000 joules per kilogram (j/kg), and in extreme cases may exceed 5,000 j/kg.
These integrated values are expressed in joules/kg. CAPE values in the range from 600 to 2000 are somewhat average.
BTU - An english system based unit of energy, based on the amount of energy to raise one pound of water one degree Fahrenheit. A BTU is equal to about 1,055 Joules of energy. See also JOULE.
calorie"(Abbreviated cal.) A unit of energy defined as that amount of energy required to raise the temperature of one gram of water by one degree Celsius (the gram-calorie or small calorie), equal to 4.1855 joules.
CAPE is directly related to the maximum potential vertical speed within an updraft; thus, higher values indicate greater potential for severe weather. Observed values in thunderstorm environments often may exceed 1000 joules per kilogram (J/kg), ...
 See also: Temperature, Wind, High, Water, Atmosphere
|
