30 METEOROLOGICAL RESULTS OF LAST CRUISE OF CARNEGIE 


Table 32. Absolute maximum and minimum Table 33. Mean daily maximum and minimum 
sea-surface temperatures by groups, sea-surface temperatures by groups, 
Carnegie, 1928-29 Carnegie, 1928-29 
Gros 
aa ae p | Maximum® | Minimum® | Daily range 
Maximum °C °C °C 
x rc cc I 11.01 9.73 1.28 
I 11.6 8.5 3.1 0 21.82 17.08 4.74b 
0 26.1 10.8 15.3 I 26.74 25.93 0.81 
peat 27.5 24.6 2.9 IV 28.09 27.25 0.84 
IV 29.1 26.2 2.9 Vv 28.770 28.08> 0.69 
Vv 29.2 27.9 1.3 VI 26.86 26.28 0.58 
VI 28.1 24.8 3.3 vu. 
vo @) 22.70 21.15 1.55 
(a) 24.7 17.3 7.4 ) 26.43 25.96 0.472 
(b) 27.4 25.0 2.4 vill 18.10 16.40 1.70 
vul 21.2 14.3 6.9 Ix 20.76 19.26 1.50 
x 22.1 13.8 8.3 x 24.50 23.37 1.13 
x 27.4 21.1 6.3 xI 28.73 28.02 0.71 
XI 30.0 27.3 ee xu 27.75 27.08 0.67 
XII 29.9 23.4 6.5 xu 
x10 {a} rt ei 19.01 2.56 
a 24.5 14.7 9.8 16.37 14.07 2.30 
3 16.7 13.1 3.6 XIV 9.552 8.612 0.94 
XIV 15.3 6.42 8.9 XV 15.79 13.29 2.50 
44 17.6 10.0 7.6 XVI 19.70 17.88 1.82 
XVI 21.6 13.9 ok xVil 
XV (a) 23.95 23.06 0.89 
(a 25.2 21.4 3.8 tP} 25.79 25.08 0.71 
(b 27.1 23.3 3.8 c) 24.00 23.19 0.81 
(c 26.4 21.8 4.6 28.16 27.48 0.68 
XVII 30.2> 26.3 3.9 Weighted 
= mean 23.570 22.402 1.168 
2 Absolute minimum sea-surface temper- =. Tish i i Sa, oc eee 
ature of cruise. @ Minimum value. > Maximum value. © Unperiodic. 
D Absolute maximum sea-surface tem- 
perature of cruise. Table 34. Mean maximum and minimum sea-surface 
temperatures and hours of occurrence for 
groups, Carnegie, 1928-29 



extreme temperatures were all recorded in the open 
ocean, all harbor temperatures having been excluded. 
As indicated in table 33, the mean daily maximum 
sea-surface temperature appears to be highest in the 
Caribbean Group. This condition is more apparent than h ne h ai °- 
Group 
real, for if the Christmas Island Group had been divided I 13 10.69 8 10.23 
at some line south of the equator, without a doubt the bef 22 20.17 12 18.32 
southern portion would present as great an area with a I oe ae0 5 aoe 
higher mean maximum temperature. IV 1 -96 6 F 
se a E J : v 14 28.66 21-22 28.30 
Table 34 indicates that there is considerable varia- 
7 Se ; 2 iar VI 11-12 26.66 3, 21 26.48 
tion in the time of occurrence of maximum and minimum vu 
mean sea-surface temperatures between the various (a) 13-15 21.95 23 21.53 
Groups. This variability among Groups was even more 13, 16 26.29 1 26.13 
pronounced than was found to be the case with air tem- vi 4 17.85 3 17.18 
peratures. The diurnal variation of sea-surface temper- x 15 20.27 3 ae 
ature is generally so small, however, that it is often rs 7 Se yg aaa 
masked by chance variations and by noncyclic differ- Ei Zi 
aes XII 14 27.51 8 27.26 
ences. Nevertheless, the frequency distribution of hours xa 
of occurrence of maximum sea-surface temperatures a 13 20.54 18 19.94 
indicates, very definitely, a maximum frequency of oc- fs 22 16.09 2 14.95 
currence at 15h, two hours later than was shown by a XIV 23 9.13 8 8.91 
similar treatment of air-temperature data (table 35). xV 18 15.35 9 14.36 
This result agrees very well with the data assem- as 7 19.26 19 18.56 
bled during the three cruises of the Snellius [24, p. 14], 5 
2 , a 16 23.77 9 23.23 
which show a maximum between 14h and 16h for each b 12,14 25.58 2. 123 25.30 
SRS c 4,13 23.75 19 23.47 
An attempt was made to determine the frequency XVII 14-15 28.01 8 27.74 
4 Periodic. 
