Tables 53—56 241 



THICKNESS AND MEAN ADJUSTED VIRTUAL TEMPERATURE OF STRATA 

 BETWEEN STANDARD ISOBARIC SURFACES 



Aerological charts are usually prepared for the 1000-, 850-, 700-, 500-, 300-, 200-, and 

 100-millibar standard isobaric surfaces. Tables 53 and 54 give the thickness of the stratum 

 between each of the above standard isobaric surfaces and every other such surface as a 

 function of the mean adjusted virtual temperature (°C). Table 53 gives the results in 

 geopotential meters and Table 54 in geopotential feet. 



Tables 55 and 56 give the mean adjusted virtual temperature ( C C.) of the stratum 

 between each successive pair of standard isobaric surfaces listed above and for the 1000-700- 

 millibar stratum as a function of the thickness in geopotential meters (Table 55) and 

 geopotential feet (Table 56). 



Computations were based on the following equations for data in geopotential meters 

 and geopotential feet, respectively (see p. 224) : 



A*„ m = 67.442 (273.16 + t' mv ) log*, & (1) 



Pi 



and A*„n = 221.266 (273.16 + t' mv ) log*, & (2) 



P* 



A$g Pm = thickness of the stratum in geopotential meters, 

 A$g P ft = thickness of the stratum in geopotential feet, 



t'mv = mean adjusted virtual temperature of the stratum (°C.) (see Table 72), 



pi = pressure of the base of the stratum, 



pi — pressure at the top of the stratum. 



where 



SMITHSONIAN METEOROLOGICAL TABLES 



