| 单词 | potential temperature |
| 释义 | > as lemmaspotential temperature potential temperature n. [compare German potentielle Temperatur (attributed to H. von Helmholtz by W. von Bezold in Sitzungsb. der königl. Preuss. Akad. der Wissensch. zu Berlin (1888) 1190)] Physics the temperature that a given body of gas or liquid would have if it were brought adiabatically to a standard pressure of 1 bar or 1 atmosphere. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [noun] > inversion > potential temperature potential temperature1876 1876 J. W. Nystrom New Treat. Steam Engin. 185 On being asked ‘What is the difference between potential and actual temperatures?’ the professor answered, ‘Potential temperature refers to volume.’ 1891 C. Abbe tr. W. von Bezold in Mech. of Earth's Atmosphere xvi. 243 Von Helmholtz recognized the objection..and proposed that the word ‘wärmegehalt’ should be replaced by the evidently much more proper expression ‘potential temperature’. When without gain or loss of heat it is adiabatically or pseudo-adiabatically reduced to the normal pressure. 1967 P. Groen Waters of Sea vii. 290 At 3500 meters, where the temperature is 1·6°C, the potential temperature is only 0·3°C lower. Whereas strictly speaking the temperature is not invariable even if there is no heat exchange, the potential temperature is, if the water proceeds to other depths and is therefore subjected to a different pressure. 1989 Sci. Amer. Feb. 38/2 The isotherm for a potential temperature of zero degrees Celsius is slightly deeper (potential temperature is the actual temperature corrected for the effect of pressure in the deep ocean). < as lemmas |
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