Is it summer in China and winter in America?

When it is summer in China, it is summer in America.

The United States and China are both located in the northern hemisphere, and the four seasons on the earth are first manifested as an astronomical phenomenon, which is not only the periodic change of temperature, but also the periodic change of the length of day and night and the height of the sun.

The gradual changes of the four seasons are not uniform all over the world. It is summer in the northern hemisphere and winter in the southern hemisphere. The northern hemisphere turns from warm to cold, and the southern hemisphere turns from cold to hot. The length of day and night and the height of the sun change periodically in different seasons.

According to the inclination of the earth's axis, winter in the northern hemisphere begins in beginning of winter in the 24 solar terms and ends at the vernal equinox around March 20th. Summer begins in the long summer and ends at the vernal equinox in September (about September 2 1).

The northernmost part of the northern hemisphere is the Arctic Circle, and the North Pole is the northern end of the Arctic Circle. Its seasons can be roughly divided into winter and Leng Xia is cold, and the average temperature is lower than other areas.

In the Arctic, the sun will be below the horizon for one day or more in winter, and above the horizon for one day or more in summer. Extreme areas can last for several months.

Baidu encyclopedia-northern hemisphere

Baidu Encyclopedia-Four Seasons (Astronomical Phenomenon)