4hw.com.cn: Qingming Festival is a day to remember one's ancestors with a little sadness. In my memory, it seems to rain or cloudy every year. The weather is also very suitable. This year is no exception, even though the sun was shining for the first two days. It will still cool down on Qingming Festival. Why is that?
Why does it rain as soon as Qingming Festival comes? Is it still cold after Qingming Festival
Why does Qingming Festival always rain
Qingming Festival does not have to rain, but the probability of rain is relatively high.
Rain will appear all over the country. Because the early April is in the early spring, the winter just past is dominated by heating regiments, and the coming summer is dominated by heating regiments. Spring is the turn of winter and summer. The cold and warm air groups are very active. They interact frequently and struggle with each other, which makes the weather a little changeable. In spring, it is often met with going out in the morning or in the bright sun, and then rain in the afternoon. This is the so-called "spring weather like a doll's face";.
Sometimes it doesn't rain during the Qingming Festival, mainly because the cold air is not strong, the air humidity is not large, the water vapor is not enough, and there is no rain condition, so the first day of the Qingming holiday doesn't appear 'rain in succession'.
The reason of rain on Qingming Festival
According to the forecast of the Meteorological Bureau, there are three possibilities
The first reason is that when spring comes, the power of cold air is relatively weak, and the warm and humid air on the ocean is active. The cold air often meets before and after the Qingming Festival, thus forming a cloudy and continuous weather.
The second reason is that the low pressure in spring is more than usual. If the clouds in the low pressure pass through once, there will be cloudy and rainy weather.
The third reason is that before and after the Qingming Festival, there is more moisture in the atmosphere than usual. This kind of moisture tends to condense and fall into drizzle at night. Because of these factors, there is more rain under the Qingming Festival. Therefore, there is a saying that there is more rain in Qingming season.
Is it still cold after Qingming Festival
After the Qingming Festival, it is usually not cold, but although it indicates that the weather is warm and colorful, it is often 'noisy'. As far as the Liang Dynasty is concerned, it has been recorded that during the cold food festival two days before the Qingming Festival, there are often "strong winds and heavy rain". If it is raining on Qingming Day, it is called "sprinkling fire rain", that is to say, "Qingming rain". Xiaodu (Du Mu and Li Shangyin are called "xiaolidu") wrote on such a day.
According to the characteristics of the solar terms, the Qingming Festival starts around April 5 and ends around April 20, which is the first ten days of April. From the distribution of precipitation days in the first ten days of April, it is also proved that Jiangnan region loves rain most during the Qingming solar term. This feature can also be reflected in the precipitation data along the middle and lower reaches of the Yangtze River and more cities in the south of the Yangtze River.
However, since the beginning of the 21st century, there has been more clear and bright rain. Especially in Beijing, the precipitation frequency of Qingming Festival from 2001 to 2010 is as much as that of Hangzhou, Nanjing and Wuhan. Especially after 2010, it seems that there is still more rain on Qingming Festival. The Qingming Festival from 2011 to 2018, not only in the south, but also in many areas in the north.