METEOROLOGICAL RECORDS 



161 



Santa Lucia 3 

 Santa Lucia is a mining center in the province of Puno (16° 

 S.), at the head of a valley here running northeast towards Lake 

 Titicaca. Its elevation, 15,500 feet above sea level, confers on it 

 unusual interest as a meteorological station. A thermograph has 

 been installed which enables a closer study of the temperature to be 

 made than in the case of the other stations. It is unfortunate, how- 

 ever, that the observations upon clouds, wind directions, etc., should 

 not have been taken at regular hours. The time ranges from 8.30 

 to 11.30 for morning hours and from 2.30 to 5.30 for afternoon. 

 The observations cover portions of the years 1913 and 1914. 



TEMPERATURE 



Perhaps the most striking features of the weather of Santa 

 Lucia are the highly regular changes of temperature from night 

 to day or the uniformly great diurnal range and the small dif- 

 ferences of temperature from day to day or the low diurnal 

 variability. For the whole period of nearly a year the diurnal 

 variability never exceeds 9.5° F. (5.3° C.) and for days at a time 

 it does not exceed 2-3° F. (1.1°-1.7° C). The most frequent varia- 

 tion, occurring on 71 per cent of the total number of days, is from 

 0-3° F., and the mean for the year gives the low variability of 

 1.9 = F. (1.06 3 C). These facts, illustrative of a type of weather 

 comparable in uniformity with low stations on the Amazon plains, 

 are shown in the table following as well as in the accompanying 

 curves. 



FREQUENCY OF THE DIURNAL VAREA.BILITY, SANTA LUCLA, 1913-11 



Degrees F. 



May 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Jan. 



Feb. 



March 



Total No. 

 of days 







— 



2 



6 



3 



4 



6 



2 







1 



— 



2 



26 



0-1 



2 



7 



7 



5 



6 



4 



S 



12 



14 



9 



5 



79 



1-2 



11 



5 



7 



11 



7 



S 



5 



5 



4 



9 



13 



85 



2-3 



2 



S 



8 



9 



3 



7 



7 



5 



5 



4 



G 



64 



3-4 



4 



4 



2 



1 



4 



1 



3 



6 



2 



4 



2 



33 



1-5 



1 



3 



1 



— 



2 



1 



3 



— 



2 



1 



1 



15 



Over 5 



— 



1 



— 



2 



4 



4 



2 



2 



3 



1 





19 



Days pei 



20 



30 



31 



31 



30 



31 



30 



30 



31 



28 



29 



321 



month 



























'Observer: Sefior Valdivia. For location of Santa Lucia see Fig. 66. 



