Yesterday (March 5)
actress Lan Yingying
posted a picture on her social account saying:
"I have never seen Guangdong Hui Nantian.
I was shocked.
I thought it was leaking."
Related topics
Netizens from Guangdong
started "team building" in the comment area
and posted live pictures
The previous wave of returning to the south was not strong enough
and the two days of returning to the south
have solidly evoked
Cantonese people's fear of being dominated by Hui Nantian
After seeing the pictures posted by netizens
many friends from the north wondered:
Is it really that exaggerated?
What exactly is Hui Nantian?
Returning to the south is:
A kind of weather return to moisture
Generally occurs in February and March in spring
Mainly because after the cold air leaves
The warm and humid air flow quickly counterattacks
causing the temperature to rise and the air humidity to increase
The surface of some cold objects
When encountering warm and humid airflow
it is easy to produce water droplets
When the dew point temperature is higher than or equal to the floor temperature
it will occur.
It is worth noting that
returning to the south is severe humidity
but moisture does not necessarily return to the south
The difference It depends on whether the floor is cold enough
Look at the dew temperature-ground temperature difference in various places in Guangdong yesterday (5th)
↓↓
Generally speaking, it is
So how can
be alleviated and ended when returning to Nantian?
There are two situations:
First, the coldness is relieved
The new cold air is affected again, driving away the warm and humid air, the outdoor temperature decreases, the dew point temperature of the air is lower than the temperature of objects such as the indoor ground, and the back-to-the-south phenomenon ends.
The second is the warming effect of
The continuous influence of warm air. The temperature of indoor objects including floors, walls and other objects rises day by day. The dew point temperature is the same as or even exceeds the dew point temperature of the outside air. It will be relieved or ended when it returns to the south. Since the temperature of floors, walls, etc. will rise slowly, this process will take a relatively long time.
Obviously
cold air can be said to be the "quick cure" for returning to the south.
So every time they return to the south,
southern people will sincerely ask:
When will the cold air come? !
Attention friends from Guangdong!
Although this wave back to the south is very powerful
, it is short-lived
The cold air has already arrived!
The cold air began to spread from north to south yesterday (5th) night and affected Guangdong
Today (6th) during the day
will arrive at the coast and affect the whole province
The northerly wind will increase and gradually ease back to the south
Source | Southern Metropolis Daily
