| 释义 |
millibar Meteorol.|ˈmɪlɪbɑː(r)|
[f. milli- + bar n.6]
The usual unit of barometric pressure, equal to one thousandth of a bar (bar n.6 2), i.e. 1000 dynes per sq. cm.
1910, etc. [see bar n.6 2]. 1914Q. Jrnl. R. Meteorol. Soc. XL. 187 The megadyne per square centimetre has been adopted and called the ‘bar’... The bar is less convenient for printing and conversation than the millibar, its 1/1000th part, and the latter has therefore been generally adopted; it is equivalent to the pressure produced by about three-hundredths of an inch of mercury or by three-quarters of a millimetre. 1924Glasgow Herald 23 Dec. 5 So far as I can judge from the synoptic chart for December 9, 7 a.m.,..the pressure at New Pitsligo at 7 a.m. seems to have been 1016 millibars, and by noon to have risen to about 1012 millibars, equivalent to 30·12 inches. 1942V. C. Finch et al. Elem. Meteorol. v. 104, 1/10 inch on a barometer or barograph is equivalent to about 3 millibars. Either inches or millibars may be used in numbering the isobars on a weather map. 1963G. M. B. Dobson Exploring Atmosphere i. 3 A scale at the side of the frontispiece gives the average pressure at different heights in millibars (mb), where 1000 mb is approximately the average pressure at sea level. |
