118 
THERMODYNAMIC METEOROLOGY 
The Thermodynamic Tables of the Planetary Circulation and 
Radiation 
After the preceding explanations regarding the observational 
data and formulas, the reader can easily study the results of 
the computations for Case II, in Tables 29-42, so that only 
special points of interest will be indicated. 
Table 29. The pressure maximum is near latitude 30° at all 
elevations; the minimum near the pole is much lower than that 
at the equator. 
Table 30. The temperature maximum is in the high-press 
ure maximum throughout the convectional region, and in the 
isothermal region it moves from near the equator toward the pole; 
there is a sharp drop in the temperature in passing from the 
convectional to the isothermal region; this boundary is located 
at 9,000-12,000 meters on the poleward side of 40° and it lies 
between 12,000 and 16,000 in the tropics; when the temperatures 
in the isothermal region are relatively cold the boundary is 
at high elevations, and when warm at low elevations respectively ; 
over anticyclones the isothermal region is at high altitudes, 
and over cyclones at low latitudes; it is high in winter and low 
in summer; its elevation depends upon the temperature and 
gravitation conditions in the convection region and not on any 
inherent forces of its own; it is distinguished in its physical 
properties from the convectional by some properties which will 
be indicated under the topic of radiation. 
Table 31. The density has nearly the same value on 
the same level of the tropics as a broad minimum, and it in 
creases toward the pole, much more in the convectional than in 
the isothermal region. 
Table 32. The gas coefficient and the dependent specific 
heat are variables, though assumed to be constant at the surface 
before radiation changes it with the elevation, but decreas 
ing upward generally, much more near the pole than over 
the equator; there is an irregularity in passing to the isothermal 
region, accompanied by the change of temperature and velocity 
of circulation. Tfie check P = pT R is confirmed at every 
point.