Division of daily range

1, the low latitude area is larger than the high latitude area, and the higher the latitude, the smaller the diurnal variation of the solar height;

2. The summer in mid-latitude area is bigger than that in winter, and the low-latitude and high-latitude areas do not change much with the seasons;

3. As far as land and ocean are concerned, the ocean is smaller than inland because of the different thermal properties of land and ocean;

4. As far as the weather is concerned, the daily range of cloudy days is smaller than that of sunny days, and the cloudy atmosphere has a stronger weakening and heat preservation effect on solar radiation;

5. As far as topography is concerned, the valley is bigger than the peak, and the depression is bigger than the height.