Under the successive cold air attacks, China has started the transformation of summer and autumn seasons from north to south. As of September 18, many places in the north have entered autumn. Some areas of Inner Mongolia, Heilongjiang and Qinghai have even entered winter, while most areas of Jiangnan and South China have just got rid of the high temperature and heat and still look like summer. China Weather Network has launched the latest national autumn progress map in 2019. Come and see if autumn girl comes to your house.
Autumn comes to many places in the north, and it is winter in a few areas
Wang Weiyue, a meteorological analyst at China weather.com, said that as of September 18, many places in northern China had entered the ranks of autumn, especially in Northeast Inner Mongolia, northern Heilongjiang, northern Tibet, northern and southern Qinghai, and some areas in Xinjiang.
However, some areas in the north are still in the sphere of influence in summer. For example, the northwest of Shandong, including Jinan, has entered autumn, but the East and south of Shandong are still in summer; Cities such as Shijiazhuang and Tianjin have not entered autumn at present, but one foot has crossed the threshold of autumn, and autumn is just around the corner.
Jiangnan and South China are still in summer and autumn, and need to wait from October
Compared with the north, China's Southern Huang Huai, Jianghuai, Jiangnan, South China, most of Jianghan and southern Yunnan are still firmly controlled by summer. However, with the southward movement of the cold air around the 18th-20th, the temperature in many parts of the South also decreases. Sooner or later, it will even make people feel cool, but it is only cool. It is still very difficult to enter autumn.
From the distribution of autumn in 1981-2010, the autumn in Jiangnan and Northern South China is in October, while the autumn in southern South China is even after November. Generally speaking, the pace of autumn is still far from Jiangnan and South China.
The autumn standard is very strict and the calculation is very complicated
In terms of meteorology, there is a strict definition of the standard for autumn. The standard is that when the 5-day moving average temperature in a place is less than 22 ℃ for 5 consecutive days, the first date less than 22 ℃ is taken as the starting date of autumn.
Wang Weiyue explained that the average temperature of a day is the average temperature of 02:00, 08:00, 14:00 and 20:00 on the same day, while the average value of 5-day sliding temperature is the average temperature of the day and the average temperature of the previous 4 days. For example, the average value of 5-day sliding temperature on September 18 is the average temperature of 5 days from September 14 to 18, Only when the average value of 5-day sliding temperature in a region for 5 consecutive days is less than 22 ℃, can it be recognized that the region has entered autumn on the first satisfied date.
(original title: the latest national autumn progress chart is released! When will miss autumn arrive at your house?)