What are the natural phenomena in spring, summer, autumn and winter?

1, Spring: In spring, the northern hemisphere of the earth begins to tilt towards the sun and receives 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.

2. Summer: The high temperature in summer in the northern hemisphere is the most remarkable climate feature. Due to the different regions and dry and wet environments, it will produce a dry and hot or wet 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.

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

4. 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.