THE ISOTHERMAL REGION 
95 
TABLE 23 
Mean Thermodynamic Values for the Atlantic Tropics 
a 
T 
P 
p 
CP 
3 
Qi-Qo 
Si-So 
Wi- 
Wo 
Ui-Uo 
Kio 
20000 
19000 
18000 
17000 
227.0 
9894 
0.2256 
668.93 
8.0 
-3012 
-13.359 
4911 
-7922 
17488 
16000 
217.3 
11213 
.2513 
709.00 
7.4 
-2570 
-10.292 
5203 
-7774 
18647 
15000 
209.9 
13331 
.2788 
788.87 
8.8 
-1898 
- 8.567 
5609 
-7506 
19328 
14000 
212.8 
15665 
.3128 
814.91 
8.5 
-1584 
- 7.361 
5750 
-7334 
21544 
13000 
215.9 
18398 
.3502 
835.84 
14.3 
-1470 
- 6.697 
5911 
-7381 
24731 
12000 
221.6 
21442 
.3911 
855.58 
13.8 
-1345 
- 5.949 
6024 
-7369 
28286 
11000 
230.3 
24942 
.4355 
861.08 
13.3 
-1302 
- 5.545 
6060 
-7362 
32588 
10000 
238.9 
28853 
.4830 
865.62 
12.4 
-1250 
- 5.135 
6086 
-7336 
37288 
9000 
247.7 
33204 
.5338 
869.26 
12.0 
-1182 
- 4.699 
6127 
-7309 
42938 
8000 
254.9 
38038 
.5879 
878.51 
11.8 
-1100 
- 4.252 
6199 
-7298 
47822 
7000 
260.1 
43413 
.6459 
887.63 
10.7 
-1000 
- 3.769 
6271 
-7271 
53935 
6000 
268.3 
49379 
.7079 
899.98 
9.9 
- 881 
- 3.247 
6368 
-7248 
59582 
5000 
274.1 
56008 
.7742 
913.55 
6.6 
- 700 
- 2.534 
6473 
-7173 
65980 
4000 
278.5 
63380 
.8453 
931.88 
6.5 
- 532 
- 1.907 
6591 
-7123 
72304 
3000 
283.9 
71569 
.9217 
946.73 
6.5 
- 397 
- 1.388 
6694 
-7091 
78606 
2000 
288.8 
80625 
1.0031 
963.44 
5.8 
- 187 
- 0.641 
6846 
-7033 
86055 
1000 
292.4 
90699 
1.0908 
984.35 
4.4 
- 24 
- 0.081 
6911 
-6935 
93656 
000 
299.5 
101753 
1.1837 
993.58 
5.8 
In the Europe group 9,000 to 10,000 is omitted, and in the 
tropic group 10,000 to 12,000 is omitted, as being regions of 
special local supply. It appears that heat is lost at about three 
times greater rate in the isothermal region than in the lower 
levels. This occurs at the same time the temperature is rising 
in the isothermal region but falling in the lower levels. The 
Victoria Nyanza ascensions give A (Qi — Qo) = — 144 through 
out the region 3,000 to 18,000, but in this case no inversion 
of T was found. (4) The principal fact to be explained is the 
slow rate of loss of heat in the convectional region, 140 per 
1,000 meters, as compared with that in the isothermal region, 
about 400. This is easily accounted for by the following facts: 
The incoming solar radiation is of short wave lengths, and pen 
etrates to the earth’s surface, having only a small amount of