NO. 7 



THE ATMOSPHERE AND THE SUN CLAYTON 



changes of pressure at Nome and also with day to day changes in 

 solar radiation. During the interval covered bv the data from which 



Fig. 2. — Zonal effect of increased solar activity. Shaded areas show regions 

 where the pressure falls and the temperature rises with short period changes of 

 solar radiation. Unshaded areas show regions where the reverse conditions occur. 



these curves were constructed. January to April, 1928, the pressure 

 at Nome followed the solar radiation changes directly, and the pres- 

 sure at Honolulu followed inversely. The changes are nearly simul- 



DAY5 BEFORE 



DAYS AFTER 



30.10 



50.05 



30.00 



29.80 



29.75 

 1.945 



.940 



Fig. 3. — Maxima of pressure at Honolulu compared with pressure 

 at Nome and with solar radiation. 



taneous except that the solar mininnun and maximimi appear to 

 occur slightly earlier. 



