When interpreting lighting and statistical charts, attention should be paid to using various information in the charts for comprehensive analysis: the morning and evening lines in the lighting chart, the direct latitude of the sun, and the central meridians of the day and night hemispheres; The horizontal and vertical coordinate names, positive and negative numbers, and the rise and fall of lines in the statistical chart.
Note that the months in the northern and southern hemispheres are the same but the seasons are opposite. In July, summer falls in the northern hemisphere and winter falls in the southern hemisphere.
Pay attention to the differences between the perihelion (early January) and the winter solstice (December 22), as well as the aphelion (early July) and summer solstice (June 22) in the Earth’s orbit.
When understanding the principle of thermal circulation, it is important to start with analyzing the distribution pattern of air pressure from the factors that affect the height of air pressure. The height of air pressure is related to altitude: the near surface air pressure at the same location is always higher than the high altitude air pressure, and the high altitude air pressure is opposite to the near surface air pressure.
