| 释义 |
tephigram Meteorol.|ˈtɛfɪgræm|
[f. tee n.1 (T being a symbol for temperature) + phi (ϕ being a symbol for entropy) + -gram.]
A diagram in which one axis represents temperature and another potential temperature (as a measure of entropy), used to represent the thermodynamic state of the atmosphere at different heights.
[c1925N. Shaw Sel. Meteorol. Papers (1955) 226/2, I have found the representation known to engineers as a θ, ϕ (temperature-entropy) diagram (or, as I shall call it here, a t ϕ diagram) has the advantage of being..more expressive than the direct pressure-temperature diagram.] 1929W. J. Humphreys Physics of Air (ed. 2) xv. 259 Tephigram... It is convenient, as developed by Sir Napier Shaw and his colleagues, to plot values on a temperature-entropy diagram. Ibid. 261 Figure 77 is a tephigram..of a balloon sounding. 1938Nature 29 Oct. 804/1 Daily tephigrams based on aeroplane soundings constitute the most valuable items in forecasting..clearing or persistence of cloud. 1969Ibid. 11 Oct. 170/1 The uniformity of weather conditions over the region in question justified our taking these tephigrams as representative of the state of the atmosphere over the area. |
