Traditional Culture Encyclopedia - The 24 Solar Terms - The coordinates of the direct sun point and the noon shadow direction in the northern hemisphere from summer to sun.
The coordinates of the direct sun point and the noon shadow direction in the northern hemisphere from summer to sun.
Where does the summer solstice sun shine directly in the northern hemisphere?
This solar term is met every year, probably on June 2 1 or 22 in the solar calendar, and the direct point of the sun is on the tropic of cancer, which is latitude 23? 26? N, it should be noted that it has nothing to do with longitude, because all longitudes on the Tropic of Cancer are the direct points of the summer solstice sun in the northern hemisphere. After this day, it gradually moved to the south, and the days in the northern hemisphere began to get shorter. For the Tropic of Cancer and its northern area, the height of the sun decreases day by day from noon, but the heat radiated by the sun to the ground is still more than that radiated from the ground to the air, so the temperature will continue to rise in the future, so there is a saying that it is not too hot from summer to the sun.
Noon shadow direction
I believe this question has been bothering my friends for a long time, but the best way is to find a reference. On the day of summer solstice, at noon, the sun is pointing directly to the tropic of cancer, so it is just east of the tropic of cancer when the sun rises. If you stand south of the NOL, the shadow will face southwest. If you are in the north of the tropic of cancer, the shadow will face the northwest; If you happen to be on the regression line, the shadow is facing west.
What are the climatic characteristics?
As we all know, this solar term is the longest sunshine day in the northern hemisphere, that is, the day is much longer than the night. The most obvious climate feature is frequent strong convective weather. Thunderstorms often form in the afternoon and evening due to strong ground heating and strong air convection. This kind of hot thunderstorm comes and goes, and the rainfall range is small. People call it summer rain over the mountains. In addition, when the subtropical high in the south meets the weak cold air in the north, there is often a feeling of damp and sultry, commonly known as sauna days. At this time, the middle and lower reaches of the Yangtze River and the Jianghuai basin are rainy and have frequent rainstorms. It is necessary to strengthen drainage management and pay attention to field flood control.
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