What causes the capriciousness of weather in April and spring?

Lead: the temperature is something that everyone pays attention to every day, because it involves the problem of cold and warm. There are daily temperature, monthly temperature and annual temperature, and the temperature will rise in some months. So, what is the reason for the high temperature in April? What causes the capriciousness of weather in April and spring? The following is the relevant content I have compiled, I hope it will help you!

The reason for the high temperature in April

High temperature is not only a periodic change caused by solar radiation change, but also an aperiodic change caused by atmospheric movement. After March 2 1 year, the northern hemisphere became extremely dark, and there was little cold air produced at this time. With the pace of warm air, the intensity of warm air stood steady and the weather continued to pick up in Jiangnan in March. In April, warm air will gain a foothold in the Yellow River Basin, so the Yellow River Basin will pick up.

April is the season change, the weather is "moody", the temperature fluctuates, and the temperature difference between day and night is large. Experts remind the public that the most important thing to go out in the morning and evening is cold protection and "spring cover". According to experts, the "cover" at this time is to keep your feet and legs warm. At the same time, don't be busy reducing the clothes on your upper body. You can use as many layers as possible to match the coat. It is best to wear suits in pairs and change clothes in time according to the weather changes to prevent colds.

At the same time, experts suggest that people who are allergic to catkins should adopt the strategy of "can't afford to hide" and try not to go to places with willows. Even if they have to go, they should wear masks and clothes. Before going home, get rid of the residue of poplar wool and don't bring it into the room. Pay attention to protect your face when you go out to play, try to go to places with lush flowers and trees as little as possible, and wash your face when you go home; If the skin has symptoms such as redness, erythema and small papules, it can be coated with desensitizing drugs for external use; If the symptoms are still not relieved, you should go to the hospital in time. In addition, citizens may wish to wear scarves or sunglasses when going out.

What causes the capriciousness of weather in April and spring?

First of all, spring is the transitional season of atmospheric circulation from winter to summer, which affects the westerly circulation in China's upper air to become relatively gentle, the intensity of the weather system is weakened, and the movement is obvious, while the cold air moves eastward and southward to meet the warm air, leading to a series of "short plays" in cloudy, sunny, rainy and snowy weather.

Secondly, in spring, warm and humid air from the ocean attacks from all directions to seize the territory, while cold air never gives up. The two PK, each showing their magical powers, staged a scene of thunder and rain.

Finally, in spring, the direct point of the sun moved to the northern hemisphere, and the solar radiation increased. The sunshine is slightly stronger than that in winter, but it is still cool in the morning and evening, and it will pick up around noon.

Because cold and warm air often cross over the Sichuan Basin, the weather changes quickly. In a day, sometimes it's cloudy and rainy. Sometimes the rain stops and the clouds disappear, and the weather is sunny. A child's face changes three times a day in spring. In the season when peaches and plums are in full bloom, sometimes due to the attack of strong cold waves, the north wind howls and the temperature drops suddenly, just like in winter, which is called "late spring cold".

Therefore, cold and warm air is behind the capricious weather in spring!

The appearance of four seasons throughout the year.

The appearance of the four seasons is due to the angle of the earth's revolution and rotation, which leads to the direct sunlight on the earth, not at a fixed point, but according to the cycle from the tropic of cancer to the tropic of Capricorn, resulting in four seasons in a year.

Generally speaking, in the four seasons of a year, spring refers to the period from beginning of spring to long summer, and long summer refers to the three months of February and March in the first month of the lunar calendar. During this period, everything grows and prospers.

Summer refers to the period from long summer to beginning of autumn, that is, April, May and June of the lunar calendar. In these three months, everything grows and the weather is hot, which is its main feature. Autumn is from beginning of autumn to beginning of winter, that is, in July of the lunar calendar in 1983. In these three months, the weather is mainly dry, and we often describe these months with crisp autumn and strong wind.

Then finally it's winter. Winter refers to the three months from beginning of winter to the next spring, and refers to 10, 1 10, 12 of the lunar calendar. These three months are characterized by cold and everything is depressing. According to the characteristics of the four seasons, the working people in China have summed up the law of long harvest in spring and summer and long storage in winter. This is the four seasons of the year.