METEOROLOGICAL RECORDS 



181 



topographic features that have some highly interesting climatic 

 effects in the eastern valleys of Peru see Chapter VI. 



Abancay, 8,000 feet (2,440 m.), in one of the inter- Andean 

 basins, is situated in the zone of marked seasonal precipitation. 



6 a.m. Noon 6 p.m. Midt. 6 a.m. 

 Fig. 119. 



6 a.m. Noon 6 p.m. Midt. 

 Fig. 120. 



6 a.m. 



Figs. 119-120— Temperature curves for the Coast Desert, November, 1911. Fig. 

 119 is for Aplao, November 4 and 5; and Fig. 120 for Camana, November 9 and 10. 

 For construction of curves see Figs. 109 to 113. 



The single day's record shows the characteristic effect of cloud 

 reducing the maximum temperature of the day and maintaining 

 the relative humidity. 



Camp 13, 15,400 feet (4,720 m.), lies near the crest of the Mari- 

 time Cordillera a little south of Antabamba. Afternoon storms 

 are one of its most significant features. Cotahuasi, 9,100 feet 

 (2,775 m.) is near the head of a west-coast valley. Its low humid- 

 ity is worthy of note. That for Salamanca, 12,700 feet (3,870 m.), 

 is similar but not so marked. 



Aplao, 3,100 feet (945 m.), and Camana at the seacoast are 

 stations in the west-coast desert. The interior location of the 

 former gives it a greater range of temperature than Camana, yet 

 even here the range is small in comparison with the diurnal ex- 

 tremes of the montafia, and the tempering effect of the sea-breeze 

 is clearly apparent. Camana shows a diurnal temperature range 

 of under 10° F. and also the high relative humidity, over 70 per 

 cent, characteristic of the coast. 



