22 METEOROLOGICAL RESULTS OF LAST CRUISE OF CARNEGIE 
Table 27. Results of Fourier analyses of diurnal variation of air temperature for groups, 
Carnegie, 1928-29 

Coefficients 
Group __.| Se eas | as eS 
°E 2G AG 7G 1G 1e nC SG 
I -.458 + .095 -.038 + .024 -.416 +.101 + .059 -.064 
Il -.277 +.107 -.008 + .058 -.507 +.150 + .096 -.092 
Ill -.609 +.181 -.012 +.018 -.410 + .209 -.004 -.066 
IV -.974 +.334 -.030 -.046 -.279 -.003 + .031 -.049 
Vv -.563 + .222 +.112 -.043 + .007 + .063 -.084 +.100 
VI -.289 +.107 + .033 -.022 -.164 +.114 -.046 -.028 
VII 
} -.621 +.188 + .007 -.016 -.120 -.012 + .003 +.016 
(b -.541 +.151 +.017 -.027 -.246 + .039 -.032 +.031 
Vill -.539 + .105 + .009 + .013 -.167 -.015 + .012 + .002 
Ix -.956 +.173 + .073 -.026 -.371 +.119 -.028 + .028 
x -.703 +.187 -.006 -.022 -.209 + .036 -.019 + .003 
XI -.672 +201 -.023 -.016 -.138 -.049 + .052 +.010 
xi -.507 + .168 -.082 -.055 -.534 -.195 -.079 -.077 
XII 
& -.369 + .251 + .084 +.051 -.210 +.129 + .056 -.005 
b -.410 + .192 + .082 -.001 -.169 -.109 +.134 -.037 
XIV -.059 +.154 + .007 + .025 -.118 +.160 -.037 + .022 
XV -.331 -.013 + .032 +.018 -.480 +.120 +.014 + .045 
XVI -.307 -.018 -.015 -.023 -.323 +.198 -.064 -.082 
XVII 
a) -.522 + .142 +.106 -.020 -.344 +.150 -.048 -.030 
y -.743 #08105) -.078 -.084 -.011 -.033 + .033 +.016 
c -.240 +.100 +.059 - -.019 -.032 -.035 -.004 -.058 
XVII -.637 +.245 + .007 -.083 -.197 + .006 + .063 -.036 
Phase angles 
SP elt ery, | ese ea sleeetea, FS ee (aa a 
“Ee °C “6 [c fe} °o ° °o 
I 0.619 .139 .070 .068 227.8 43.2 327.2 159.4 
of 0.578 .184 -096 .109 208.7 35.5 355.2 147.8 
I 0.735 .276 .013 .068 236.1 40.9 251.6 164.7 
IV 1.013 .334 -043 -067 254.0 90.5 315.9 223.2 
Vv 0.563 -231 -140 .109 270.7 74.2 126.9 336.7 
VI 0.332 .156 .057 .036 240.4 43.2 144.3 218.2 
Vil ~ 
(a) 0.594 .156 .036 -041 245.5 75.5 152.0 318.9 
(b) 0.632 .188 .008 .023 259.1 93.7 66.8 315.0 
Vill 0.564 .106 -015 -013 252.8 98.1 36.9 81.3 
Ix 1.025 .210 .078 -038 248.8 55.5 111.0 cries | 
x 0.733 -190 .020 -022 253.4 79.1 197.5 277.8 
XI 0.686 .275 .057 .019 258.4 100.3 336.1 302.0 
XII 0.737 “avi .114 -095 223.5 139.3 226.1 215.5 
XII 
a 0.424 .282 -101 .051 240.4 62.8 56.3 95.6 
b 0.445 .221 sly -037 247.6 119.6 31.5 181.5 
XIV 0.132 eaee .038 -033 206.6 43.9 169.3 48.7 
XV 0.583 oL21 -035 -049 214.6 353.8 66.4 21.8 
XVI 0.446 .199 .066 -085 223.5 354.8 193.2 195.7 
XV 
a) 0.625 .206 -116 -036 236.6 43.4 114.4 lee 
fs 0.743 .307 -085 .086 269.2 96.2 292.9 280.8 
2} 0.242 .106 .059 -061 262.4 109.3 93.9 198.1 
XVII 0.667 .245 .063 -091 252.8 88.6 6.3 246.6 


corrected for noncyclic change. These corrected mean 
hourly departures of air temperature are given in table 
28, and the mean diurnal curves in figure 19. Unfortu- 
nately, the number of days included in each range of lat- 
itude for the pressure and temperature data are not 
mospheric pressure in order to obtain the Fourier quan- 
tities for the 24-, 12-, 8-, and 6-hour waves (table 27). 
Figure 20 has been prepared to show the mean am- 
plitudes of the 24-, igs 8-, and 6-hour oscillations of 
air temperature and pressure for the several ranges of 
equal owing to instrumental difficulties previously des- latitude. One conspicuous feature of this diagram is the 
cribed, with the result that more days are included in large diurnal amplitude of air temperature, cj, com- 
the means of pressure than in the means of temperature. | pared with the semidiurnal term, ¢9. Between latitudes 
The mean hourly departures of air temperature were | +20°, the 24-hour term averages 2.8 times larger than 
analyzed in the same manner as the departures of at- the 12-hour term. It appears necessary, however, to 
