As the saying goes: heat in three volts. The dog days are the most difficult time of the year, and they are the hottest, humid and sultry days of the year. At this time, we should pay attention to heatstroke prevention. So, which one is the hottest on a three volt day? Let's take a look at it with Xiaobian~
The hottest is MV.
In the three volt days, Zhongfu is the hottest time. The most prominent feature of Zhongfu is heat, and it's wet and hot. The typical 'sauna' weather makes people feel uncomfortable if they want to breathe.
The dog days in 2018
Early lodging time in 2018: July 17, 2018 to July 26, 2018, 10 days
Medium voltage time in 2018: July 27, 2018 - August 15, 2018, medium voltage, 20 days
Last time in 2018: August 16, 2018 to August 25, 2018, last time, 10 days.
The last is not the hottest
Generally speaking, the last volt is not the hottest. The middle volt is the hottest in the three volt days. After lodging, the surface humidity becomes larger, the heat absorbed by the ground every day is more, the heat emitted is less, and the heat of the surface layer accumulates, so it gets hotter day by day. Entering the middle voltage, the heat accumulated on the ground reaches the highest value, and the weather is the hottest.
Why is Zhongfu the hottest
In summer, the heat is in the third volt, and the middle volt is the hottest.
After falling into the ground, the surface humidity becomes larger, the heat absorbed by the ground every day is more, the heat emitted is less, and the heat of the surface layer accumulates, so it gets hotter day by day. Slowly in the middle of the volt, the heat accumulated on the ground reaches the highest value, and the weather is the hottest. In addition, there is more rain in summer, and the air humidity is large. The heat capacity of water is much larger than that of dry air, which is also an important reason for the sultry weather. In July and August, the subtropical high pressure was strengthened. Under the control of the subtropical high, the downdraft inside the high pressure made the weather clear and cloudless, which was conducive to the sunshine, the ground radiation increased temperature, and the weather was even hotter.