. Smithsonian miscellaneous collections. h. Where one example is given, manyothers might have been presented. In the earlier papers of this series the first finding of importancewas that there was a marked latitude efifect of solar radiation changeson the pressure and temperature of the earths atmosphere. Accom-panying or immediately following short-period changes in radiation,there was an increase in temperature and a fall of pressure in equa-torial regions, a rise of pressure and a fall of temperature between40° and 60° latitude, while at latitudes above 70° the pressure felland the temperat
. Smithsonian miscellaneous collections. h. Where one example is given, manyothers might have been presented. In the earlier papers of this series the first finding of importancewas that there was a marked latitude efifect of solar radiation changeson the pressure and temperature of the earths atmosphere. Accom-panying or immediately following short-period changes in radiation,there was an increase in temperature and a fall of pressure in equa-torial regions, a rise of pressure and a fall of temperature between40° and 60° latitude, while at latitudes above 70° the pressure felland the temperature rose. These conditions hold true for both thenorthern and southern hemispheres. The chart illustrating this factis reproduced in figure 2. Figure 3 shows how, in the average of many cases, day to daychanges of pressure at Honolulu are associated with simultaneous NO. THE ATMOSPHERE AND THE SUN CLAYTON changes of pressure at Nome and also with day to day changes insolar radiation. During the interval covered by the data from which. Fig. 2.—Zonal effect of increased solar activity. Shaded areas show regionswhere the pressure fails and the temperature rises with short period changes ofsolar radiation. Unshaded areas show regions where the reverse conditions occur. these curves were constructed, January to April, 1928, the pressureat Nome followed the solar radiation changes directly, and the pres-sure at Honolulu followed inversely. The changes are nearly simul- DAYS BEFORE DAYS AFTER
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