What are the natural features of each year?

China people believe that the four seasons have different characteristics, namely "spring", "summer", "autumn" and "winter storage". That is, everything grows in spring, grows in summer, harvests in autumn (mature) and hides in winter (animals hibernate and plants shed leaves).

Spring: In spring, the northern hemisphere of the earth begins to tilt towards the sun, receiving more and more direct sunlight, so the temperature begins to rise. As the ice and snow melt, the water level of the river rises. In spring, plants begin to sprout and grow, and many flowers bloom. Hibernating animals wake up, many animals with eggs for the winter hatch, and birds begin to migrate, leaving the wintering ground for breeding grounds. Many animals are in estrus during this period, so China also calls spring the season of "the revival of everything". The changes of temperature and biology in spring also affect people's psychology and physiology.

Summer: The summer high temperature in the northern hemisphere is the most remarkable climate feature. Because of the different regions and dry and wet environments, it will produce a dry and hot or humid and rainy climate. Summer is the best season for the vigorous growth of many crops, and sufficient light and suitable temperature provide necessary conditions for plants. Most areas will be affected by low pressure and the climate is relatively stable. But the ocean near the equator will form a typhoon, which is easy to damage the surrounding area.

Autumn: Generally speaking, in autumn, the altitude angle of the sun gradually decreases and the temperature gradually decreases; The autumn wind is cool, the summer heat is gone, the fruits are covered with branches, and the fields are golden.

Winter: Winter means silence and desolation in many areas. When the cold current strikes, living things will reduce their life activities, many plants will shed leaves, animals will choose to hibernate, and some are called hibernation. Migratory birds will fly to warmer places for the winter.