Why does the weather in Chengdu alternate between hot and cold regularly recently?

This is a very simple truth, you should have learned it in middle school.

The moon can often be seen at night recently. I wonder if you have noticed it. Seeing the moon means that there are not many clouds in the sky. The clouds can reflect infrared rays and have a thermal insulation effect, so if there are clouds at night, the temperature will not drop too much at night. The temperature will be a little warmer the next morning.

Sichuan is a basin, and Chengdu is the plain in the middle of the basin. Sichuan is cloudy all year round and has heavy fog in winter because the water vapor from the mountains around the basin covers the sky above the basin to form clouds and fog. Water vapor needs to cool down to turn into clouds, which explains why it's cooler after a sunny day.

Now that we understand the above principles, let’s talk about why one day is cold and the other is hot.

The cold air some time ago has just passed, so the temperature has risen a lot. In addition, the clouds in the sky have dispersed due to the rise in temperature, so the ground temperature has risen. At night, because there are no clouds, the temperature drops quickly. This not only lowers the temperature the next day, but also lowers the temperature of the mountains around the basin, so the water vapor on the mountains moves to the sky above the basin. Cooling temperatures combined with clouds made the second day cooler. Although it is a bit colder and cloudy, the sun remains unchanged, so it will slowly heat up during the day. The next day, the sun becomes much thinner due to the clouds. If you pay attention, you will see the hazy moon. The clouds kept us warm so the temperature didn't drop much the next day; the clouds thinned so the clouds cleared up and the fog dispersed as soon as the sun came out the next day, so it was a beautiful day again. This cycle is the weather changes during this period. If this kind of weather changes, it will need an outside cold air or warm current to break it, or the wind will blow up one day to change the overall flow trend of the clouds, otherwise it will continue to be cold and hot one day.

I usually like to watch changes in the weather, especially going out to look for the moon at night. Plus, I never believe in weather forecasts, so I often make my own guesses based on sanitary cloud maps, radar reflection maps, and water vapor maps online. .

If you are also interested in doing your own research, I can recommend a website to you. It is very professional. As long as you know some common sense about meteorology, you can see very professional data. Satellite cloud images are real responses to the weather. As long as you It makes sense, it should be much easier to use than the weather forecast.

China Weather-Chengdu Weather:/weather/101270101.shtml