Characteristics of winter

The main characteristics of winter are low temperature, more fog, less insects, dry skin and so on. The whole winter includes beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold. In the northern half of the earth, the day from winter solstice is the longest night and the shortest day. Since the winter of the solstice, it has entered a "cold day".

Snow falls in many places in winter, and ice hangs on the low eaves. The snow and ice in most parts of the north will not melt until spring. In winter, the direct point of the sun moves south to the tropic of Capricorn, and then turns back to the north. Most animals can't maintain the constant body temperature needed for normal activities in winter, so they can only hibernate through the cold winter.

An obvious change in winter.

Changes are reflected in climate, environment and so on. Climatically, the temperature will drop obviously in most areas except the equator in winter, and the climate will get cold. Environmentally, rivers at high latitudes may freeze, trees will wither, everything will enter a state of recuperation, and people will put on cotton-padded jackets in their lives.

In the northern hemisphere, winter generally refers to the Gregorian calendar 65438+February, 65438+ 10 and February; In China, it refers to the three months from winter to spring; In the southern hemisphere, it generally refers to June, July and August of the Gregorian calendar.

Winter is winter and belongs to one of the four seasons. Traditionally, beginning of winter is the "beginning of winter" among the 24 solar terms. In winter, everything is closed and enters a state of recuperation.

Divide the four seasons according to the climatic average temperature method. When the average temperature of the day is equal to or lower than 10℃ for five consecutive days, it is generally considered as winter. At this time, the trees shed leaves and most animals go into a dormant state.