Good news! The cooling of the south has come, the cold air "strong attack" the south, has arrived, of which the northern part of Hubei and other places have appeared 10 degrees to 12 degrees of temperature decline, see no? Drop 12 degrees! Of course, a large area in the north is almost completely "shrouded" by cold air, the cooling has been very obvious, the northwest, north China, northeast and other places have seen a temperature decline, Henan local temperature decline is also up to 12 degrees, so it is very strong.
However, at this time, friends in Hunan may say, are we not the south? Hunan Hengnan is almost 39 degrees, Yongxing and other places are also about to reach 38 degrees, are we not the south?
In fact, it is not, cold air has indeed entered the south, but the scope of cooling has not been expanded to the limit value, so the cold air mass has not yet come, just the subtropical high pressure is still "resisting", so that the high temperature in Hunan has not been completely alleviated for the time being, here can only say that everyone do not worry, cold air is still continuing to increase.
It is expected that from October 7 to 10, a wave of stronger cold air will be "replenished", and there will be a temperature drop in Jiangnan and its north, and the temperature in a wide range of areas will drop by 4 degrees to 8 degrees. In the northwest, north China and other places, it can drop more than 10 degrees.
Therefore, there is still a lot of cold air, and around the 13th, there are cold air masses in the north going south. This is not a large-scale cooling in the south this year, "hair-trigger", everyone just waits. And the cooling in the southern region has actually been advanced, the southwest region in the "eleventh long holiday" has been attacked by the northern air conditioning mass, there has been a decline in temperature, many cities have been "overnight into winter", wearing short sleeves in front, adding "autumn clothes" in the back, and even some people wear "cotton clothes", so it is quite fast.
We can also see from the situation of the supercomputer that on October 7, there was a "purple cold air mass" in the northwest direction, and by October 10, cold air continued to pour into the south of China, at this time, although the subtropical high pressure was very strong, but the cold air still directly "penetrated" into China's Sichuan, Guizhou and other places, and the resulting marine warm current was also continuously sucked into the south, who is sucking it? Friends who have seen the development of typhoon embryos should know that there is a 92W typhoon embryo in China's marine area, and there is also a 93W typhoon embryo in the coastal area of the Philippines, and these two typhoon embryos have the possibility of development.
That is, it may become this year's Typhoon No. 17 "Lion Rock" and Typhoon No. 18 "Compass", and from the path of these two typhoon embryos, both are westerly and may be close to the coastal waters of South China. And because of this, the cold air in the south is constantly affected by the typhoon and is constantly absorbed, so the scope of cold air is further expanded. After October 13, a stronger wave of cold air appeared, and this time the cold air came more fiercely.
Although it can not be connected to the "cold air flow" on time to go south, but in the stage of the final expected disappearance, there will still be cold air flow absorbed by it to the south, at this time, a large area in the south will continue to cool down, and, including Fujian, Guangdong and other places, the warm current has been sucked away by it, so part of the cold air flow may also go straight to Guangdong Fujian. So, widespread cooling is really certain. At this time, many provinces may completely enter the mode of "entering autumn", and the climate of "autumn high and cool" will also appear.
Therefore, from this point of view, in fact, the development of two typhoon embryos has played an important role in the cooling of the south. Although we are talking about Hubei and other places have cooled down, without the impact of typhoons, but also feel the strength of cold air, is entering the south on a large scale.
This also shows that this year's autumn tiger may really be over, the large-scale cooling in the south has arrived, two waves of cold air mass will continue to affect the south, the scope is further expanded, get ready, the larger scope of cooling is also fast.
Many people say that with such a strong cooling, will there be the first "national" cold wave of the year in October? In the short term, the scope of cooling is large, but to release a national cold wave, this also depends on the extent of cooling, the national cold wave needs to cool > 10 ° C in the process of daily average temperature, and there will be large-scale cooling in the north and south, reaching a specific standard value.
Therefore, the "national cold wave" does not mean that it is released on the spot, it needs to look at the temperature change, and there are other factors and so on, but the regional cold wave is still probability. We can only continue to observe, but the cooling in the south can be determined, and everyone is ready to wear thick clothes.
At the same time, it is worth being vigilant that such a "sharp climate" is really a bit unusual, which shows that this winter's climate may also be an "extraordinary" model, and it is expected that there will be a la Niña phenomenon this year, so everyone should prepare thick clothes, this year's cold air may be highly frequent, and when the La Niña phenomenon appears, the cold air mass continues to move south is the most conventional feature.
At the same time, the Japan Meteorological Agency also explained that this year's high pressure in the interior of Asia may be very strong, resulting in a greater possibility of cold air moving south, which once again proves that this year's winter may be really cold.
Of course, this seems to be back to the problem of cold winter and warm winter that everyone said, or that sentence, as to whether it is a cold winter or a warm winter, it needs to wait until the end of winter to determine, why? Climate change is so complex that everything is variable, and that's why.