The variability In the R and the related lOOff-is considerably 

 inore in longitude than in the seasonal or latitudinal analysis, 

 while the variability in the standard deviation is about the same in 

 longitude and in the latitudinal analysis. The variability in the R 

 and lOOR-is related to the fact that for the san^ples with the 

 smaller R and 100/?" there is little change in temperature with 

 longitude. In other words, there is not much systematic variability 

 to explain. For the samples with the larger R and lOOR^ values, 

 the systematic longitudinal variation is relatively greater. Thus, 

 these statistics are not comparable, since they are not independent, 

 for any given sample, of the overall change in temperature with 

 longitude. On the other hand the standard deviation, which is a 

 measure of the random variability in the variation of the tempera- 

 ture, may be compared from sample to sample. 



It is concluded that in the geographical area under consider- 

 ation the surface temperature is less sensitive to longitudinal 

 change than to latitudinal and seasonal change, that there are 

 considerable differences between latitudinal strips, and that equa- 

 tion (3) is flexible enough to describe these differences. 



34 



