AIR TEMPERATURE 
Table 21. Absolute maximum and minimum air 
temperatures in degrees centigrade for 
groups, Carnegie, 1928-29 

I 9 13.1 8.4 3.6 0.8, 
II 4 25.1 11.9 4.5 2.9 
m 13 28.2 23.9 3.0 1.5 
IV 21 30.6 24.2 5.0 1.3 
Vv 9 30.5 25.1 3.5 1.3 
VI 12 29.2 22.3 4.2 1.0 
VII 
a 35 24.2 18.0 4.8 0.6 
(3) 7 28.0 24.5 2.0 1.2 
VII 8 22.6 14.9 3.2 1.3 
Ix 14 25.2 17.7 5.7 1.2 
xx 12 27.6 21.1 4.6 1.0 
XI 21 31.0 24.1 5.0 1.4 
XII 32 31.2 24.2 3.3 0.8 
XIII 
a 13 26.2 15.9 4.0 0.9 
{a} 3 18.2 13.4 2.4 1.3 
XIV 19, 14.1 6.32 3.4 0.42 
XV 7 17.6 ies 3.5 1.6 
XVI 5 21.8 14.2 3.5 1.3 
XVII 
a 8 25.8 20.7 4.0 ial 
8 27.5 22.5 4.0 17 
c 14 25.9 19.2 4.0 0.6 
XVIII 20 32.5) 24.0 5.2 0.9 

2 Absolute minimum values for cruise. 
Absolute maximum values for cruise. 
ventilation was at a minimum. 
The absolute maximum temperature of the cruise 
(32°5) was recorded on November 14, 1929, at 13h in lat- 
itude 11°6 south, longitude 163°4 west. The absolute 
minimum temperature (6°3) was noted on July 8, 1929, 
during 19h to 20h in latitude 46°9 north, longitude 163° 
west. The greatest daily range of air temperature (5°7) 
was registered off the coast of Chile on January 2, 1929, 
during a period of nearly dead calm. 
The mean daily maximum and minimum tempera- 
tures for the various groups are listed in table 22. The 
highest mean maximum air temperature and also the 
highest mean minimum, 29°4 and 26°6 respectively, 
were recorded in the Caribbean Group between October 
2 and 10, 1928. The lowest mean maximum temperature 
(10°6) occurred in the Alaskan Peninsula Group between 
July 4 and 21, 1929, whereas the lowest mean minimum 
air temperature occurred in the South Greenland Group 
for the period between July 29 and August 6, 1928. 
As shown in table 23, there appears to be consider - 
able variation in the time of occurrence of maximum and 
minimum temperatures between the various Groups. No 
doubt much of this variation can be assigned to the un- 
symmetrical distribution of data with respect to season, 
latitude, and distance from continental land masses. In 
addition, since the diurnal and interdiurnal variations of 
air temperature are everywhere small and, in many 
cases, the number of days of observation few, there is 
considerable opportunity for chance variations. In fact, 
merely raising or lowering the mean hourly temperature 
a fraction of a degree at some given hour within a Group 
would, in several instances, retard or advance the time 
19 
Table 22. Mean daily maximum and minimum air 
temperatures in degrees centigrade for 
groups, Carnegie, 1928-29 
c 
XVIII 

No. Mean 
Group days Maximum 2 Daily range# 
9 11.2 8.8 2.4 
4 19.9 16.1 3:8 
13 27.5 25.2 2.3 
21 28.9 25.7 3.2 
9 29.4 26.6 2.8 
12 26.5 23.9 2.6 
35 22.3 20.2 2.1 
7 27.1 25.4 ee 
8 18.5 16.3 2.2 
14 22.1 19.0 3.1 
12 25.2 22.9 2.3 
21 29.2 26.5 2.7 
32 28.1 26.2 1.9 
13 22.0 19.3 2.1 
3 16.8 14.9 1.9 
19 10.6 9.2 1.4 
7 15.6 13.2 2.4 
5 19.4 17.0 2.4 
8 24.1 22.0 2eL 
8 26.5 24.0 2.5 
14 24.0 21.7 2.3 
20 28.6 26.2 2.4 
23.90 21.54 2.36 
Weighted mean 
2 Unperiodic. 
Table 23. Hour of mean maximum and minimum air 
temperature in degrees centigrade for groups, 
Carnegie, 1928-29 
Mean maximum 
Mean minimum 
temperature 4 
° 

h i h 
I 16 10.77 6 9.50 
II 18 18.62 6 17.13 
Til 13 Sica: 6 25.75 
IV 11 28.60 3 26.44 
Vv 14 22.04 3 27.69 
VI 13 25.84 6 24.95 
VII 
R 13 22.13 4 20.76 
b 14 27.02 2-3 25.61 
VIII 13 18.21 2 16.86 
IX 14 21.80 4 19.47 
x 14 24.95 1 23.31 
XI 13 28.91 1 27.25 
XII 13 28.16 1 26.49 
XOII 
@} 12 21.18 5 19.95 
b 10 16.34 4 15.06 
XIV 14 10.16 8 9.49 
XV 15 15.42 5 13.99 
XVI 15 19.06 1 17.86 
XVII 
: 14 23.83 3 22.20 
b 12 26.26 24 24.43 
(c 15 23.07 3 22.48 
XVIII 12 28.20 6 26.68 
Weighted 
meanvelseae 6) esncces Ree aneadeead 
2 Periodic. 
