Gansu many places "look at the day heating" to extend the heating time, why in April is still late to warm up?

Xinhua News Agency, Lanzhou, March 31 (Reporter Bai Liping, Wang Peng) March 31, Gansu Province, rain and snow, the temperature plummeted. Some places decided to extend the heating time.

October 31 to April 1 every year is the traditional heating season in Gansu Province. However, abnormal weather occurs in the area every winter and spring. In recent years, some places in Gansu have explored ? Flexible heating?

Why is it still late to warm up in April?

Spring is mainly caused by frequent incursions of prolonged rainy weather or cold air, or usually caused by strong radiative cooling under the control of cold resistant air rotation. If the average temperature is less than 2?C, it is considered a severe inversion of weather. It may cause harm to agricultural production. In particular, the damage is more serious when the temperature is higher than the normal temperature for the previous period. .

In the four seasons, the most invincible weather element season such as temperature, airflow and air pressure is spring. This tends to be sunny days, which makes people feel ? warm up? s feeling, but early in the morning and late in the evening, the cold is hit, which makes people feel ? spring cold? This kind of? good change? weather that makes people feel uncomfortable is usually the? reverse spring cold?

Usually, people will enter the beginning of spring at the end of February. The most important feature of the spring climate is that the temperature is very cold: first of all, the temperature difference between the large; secondly, the spring cold air power is frequent, the weather occurs more. In meteorology, ? Reversal of cold? from the earliest in agriculture, i.e., (5 days?). There are more than 10?C, due to frequent attacks of the strongest cold, the temperature fasting more quickly, the last temperature for up to 1-2 days, and lead to weather phenomena or weather processes in a variety of crops in the frozen crops.

Spring is a **** the same weather that has occurred not only in China, Japan, Korea, India and the United States, but the reasons for its formation are not complicated. Typically, the average temperature over the year exceeds 2?C, and there will be more severe cold. The more cold air, the wider the cooling range, and the wider the cooling range, the greater the likelihood of a cold spring.

In the context of a cold spring, it is mainly in the context of the warmth of our temperatures, affected by the cold air in the north, the north of the continuous rain and rain, the average temperature is lower compared to the year and lasts for a period of time weather phenomena. As for the temperature temperature drop, the criteria are slightly different. For the northern region, the spring will mean that the cold air force is enhanced and the temperature falls; for the southern region, it is usually connected with low temperatures and rain.