“January is cold, February is cold, March is cold.” This is a proverb that is no longer strange to every Vietnamese when talking about the phenomenon of the weather. weather in the Northern provinces in the early part of the year.
So what is the real cold of Nang Ban? Why does it exist? What is this as well as the explanations surrounding the unusual cold phenomenon before entering the hot season?
The story of the cold of Lady Ban
< figure class=”image align-right” contenteditable=”false” style=”width:50%”>
The story of Lady Ban sewing clothes for her husband explains the phenomenon of late cold in the Northeastern provinces for many years.
< p>According to legend, Ms. Ban is the daughter of the Jade Emperor, but unlike many of her sisters, Ms. Ban is slow and somewhat clumsy.
Miss Ban’s husband is also a person in the heavenly world. She loves her husband very much. Seeing that the cold season had come, she decided to make a cold shirt for her husband.
But she was so clumsy that when she started to get cold, Ban started her work but kept struggling to find something that was missing. The other thread can be threaded but there is no needle to put the thread into weaving, then the bobbin will be damaged.
So much so that it’s almost spring and I’ve only sewn my wrists. But Ms. Ban was still not discouraged.
She continued sewing through January and then through February until the shirt was finished, just as the cold weather stopped.
Nang Ban is very sad. Seeing his child sad, Ngoc Hoang asked. When she heard about the Jade Emperor, she was moved and made it cold for a few days so her husband could try on the shirt.
Since then, it has become a custom that every year around March, although the cold season has passed, the hot season has arrived, but there are times when it is suddenly cold. Some days people call that cold the Ban cold.
Scientific explanation for the cold phenomenon of Lady Ban
Coldness of Lady Ban usually falls from late March to early May of the solar calendar. This is essentially a late cold spell due to the influence of cold air from the North coming in at the end of March and even April of the solar calendar when the weather has warmed up quite a bit.
Based on cloud charts from observatories and measuring tools, it can be seen that during this time cold air is still present. active and there are still periods of cold weather.
The typical weather type of Ba Ban cold is often accompanied by light rain. Drizzle caused by the cold air mass at the end of the season is not just from North to South but slightly deflected east across the Gulf of Tonkin, bringing in water vapor from the sea.
During this time, the temperature may decrease by 5 – 8 degrees Celsius, causing the average temperature to drop below 20 degrees Celsius. In addition, in some places there may be showers and strong thunderstorms during the storm. hail storms and strong winds.
In fact, the cold spell in Nang Ban is not a severe cold spell like many cold spells during the season. winter. However, because the general temperature of the area has warmed up quite a lot compared to December, people often feel very cold because of that.
Due to climate change in Vietnam in particular and the world in general, it’s cold every year. also appears, but some years it occurs several times, each lasting a few days.
Specifically according to the Center’s statistics According to the National Hydro-Meteorological Forecast, the frequency of cold spells during this time is only about 30%. So on average, every 10 years, there are about 3 times the phenomenon of cold weather occurs.
Global warming Prolonged strong El Nino and urbanization effects are the reasons given to explain this change.
At Vietnam’s cold weather has a certain impact on agricultural production because at the time of cold, crops, especially rice growing in the ground, low temperatures will affect the normal development of rice plants, affecting productivity. rice yield.
In addition, sudden cold will affect the health of the elderly and young children because the body cannot adapt in time. response. That’s why people have the saying: “In the cold of March, the old woman freezes to death.
“
