Frost hit Zhangjiakou and farmers suffered heavy losses. Why did the local area "enter winter overnight"?
Recently, the high summer temperatures in many areas of our country have not yet dissipated, but the Zhangjiakou area suddenly experienced the experience of "winter overnight".
On August 25, the Zhangjiakou Meteorological Observatory issued a cold wave blue warning. Compared with other areas, residents in the Zhangjiakou area may have been accustomed to premature severe cold weather, but it is similar to This sudden drop in temperature still caught many Zhangjiakou residents off guard.
It is not even August yet, and the temperature in Zhangjiakou has plummeted to zero degrees Celsius. This extreme weather has not only had a serious impact on the lives of Zhangjiakou residents, but also on the local crop cultivation industry. Residents suffered significant economic losses.
The severe cold weather in Zhangjiakou is not an ordinary cooling. The main reason is due to the cold wave.
Cold wave, as the name suggests, is when cold air from the polar or frigid zone flows like a tide to low latitudes relying on wind force. It directly causes the area where the cold wave is poured into to be widely affected by the strong winds and freezing damage of the cold wave, and also indirectly causes caused significant damage to the region's economy.
The Zhangjiakou area is located in the northern part of Hebei Province. The area happens to be in the continental monsoon climate zone, which results in Zhangjiakou area having cold and long winters and cold, dry and windy springs.
In addition, the terrain of Zhangjiakou area is high in the northwest and low in the southeast. The low-lying area in the southeast of Zhangjiakou will be greatly affected by the cold wave because there is no barrier in the north. The northwest of Zhangjiakou is close to the Inner Mongolia Plateau, so when the cold air from Siberia When it drives straight down, a large number of dense cold air groups accumulate in the Siberian Plateau and Inner Mongolia Plateau, forming a very strong cold wave force, which is why the power of this cold wave can be so huge.
There are many mountain peaks in Yuxian County in the south of Zhangjiakou, and the high summer temperatures of the North China Plain cannot enter Zhangjiakou. However, there are many basins and troughs in the central part of Zhangjiakou, which causes the cold air heading south to encounter obstacles again. Later, a series of extreme weather such as hail, heavy precipitation, and strong winds formed.