| 释义 |
precipitable, a.|prɪˈsɪpɪtəb(ə)l|
[f. L. præcipitāre to precipitate + -able.]
a. Capable of being precipitated from solution in a liquid, or from a state of vapour.
1670W. Simpson Hydrol. Ess. 75 Vitriol contains a greater quantity..of a precipitable ocre. 1782Kirwan in Phil. Trans. LXXIII. 78 A very saturate solution of lead is difficultly..precipitable by iron. 1878Abney Photogr. (1890) 37 Precipitable silver compounds.
b. precipitable water (Meteorol.): the quantity of water vapour in an atmospheric column of unit cross-section, expressed as the depth it would have if condensed to a liquid or as the mass.
1928Mem. R. Meteorol. Soc. III. 2 If m is the mass of water vapour in grams over each square centimetre of the base of the stratosphere we have mg = 33, i.e. m = ·034 gram. Thus the water vapour in the stratosphere is equivalent to ·34 mm. of precipitable water. 1971Nature 23 Apr. 503/1 Schorn et al. have observed average water contents in the northern hemisphere [of Mars] of up to 25 µm of precipitable water. |