Why is Hanoi and North and Central hot and hot?

According to the Central Center for Meteorological and Hydrological Forecasting, unusual hot weather is happening in the North and Central regions, which is considered a record in the past 15 years. So why is this unusual heat wave?

The cause of intense heat in the North and Central

The central weather forecast agency said yesterday (June 30), hot weather has occurred in a large area in the Northern region and central coastal provinces with the highest temperature of 36-39 degrees. , some places over 39 degrees such as: Hoa Binh 39.5 degrees, Viet Tri and Ha Dong (Hanoi) 39.4 degrees, Lang (Hanoi) 39.8 degrees, Son Tay (Hanoi) 40.1 degrees, and Nho Quan (Ninh Binh) 40.0 degrees, Phu Ly (Ha Nam) 39.6 degrees. The central provinces also recorded intense heat with Tinh Gia (Thanh Hoa) 39.9 degrees, Sam Son (Thanh Hoa) and Do Luong (Nghe An) 39.5 degrees, Con Cuong (Nghe An) 39.6 degrees, Tuong Duong (Nghe An) and Tam Ky (Quang Nam) 39.4 degrees .

The hot sun raged violently in the North and Central.(Photo: Building newspaper.)

Today (July 1), the hot sun will continue to maintain in the Northern region and central coastal provinces with the highest daily temperature of 36-39 degrees, with over 39 degrees.

This heat wave is expected to last until the end of the week.

Compared to the heat wave in late May, this heat level is not as high. However, because of the day and night, the sky is clear and blue, the wind is low, the humidity is low, the temperature is only 4-5 degrees Celsius, making the atmosphere very suffocating. As of 22:00 last night, Hanoi is still hot at 34 degrees Celsius, the humidity is only 63%.

One million candidates began to take the "2 in 1" exam under a record heat.(Photo of VTC.)

Mr. Le Thanh Hai, Deputy General Director of the National Center for Meteorology and Hydrology, said the cause of this long-lasting record heat is due to the effects of the El Nino phenomenon of hot brewing.

Specifically, Mr. Hai said that in 2015, due to the impact of El Nino phenomenon, the national temperature scale was more popular than the average of 0.5-1 degrees Celsius. In which, from March to By the end of May, the heat background is higher than the average of about 2 degrees Celsius years. Hot and hot sunshine comes earlier and ends later in the North, North Central and South Central regions.

Besides, the rainy season in the North and North Central will come later, with less rainfall than usual. The rainy season in the North and North Central region usually starts from the end of April, but this year must be at the end of May to begin. Sub-chronic flood recorded in the North is also very low. Rainfall in the North in April and May is less than the average of 20-30%. We just recorded a shower and a big thunderstorm around April 20 and another heavy rain on May 22-24.

El Nino (in Spanish means the Child, referring to Jesus) is an abnormal warming phenomenon of surface seawater in the central and eastern Pacific equator, extending 8 - 12 months, or longer. The phenomenon of El Nino often occurs every 3-4 years, but sometimes even thicker or thinner. El Nino will appear to lead to unusual changes in temperature and precipitation of many regions. In our country, El Nino will reduce rain, increase temperature, causing drought to cause severe damage to crops.

In addition to Vietnam, El Nino together with climate change has caused abnormal heat and droughts in many countries in East Asia and Southeast Asia this year. For example, the worst heat wave in India has killed nearly 1,500 people in more than a week. In Israel, a record heat wave has caused forest fires, delayed flights and a high number of cases of dehydration and fainting.

Thailand recently announced a drought disaster in 34 provinces with about 371,000 ha of agricultural land affected. In the Philippines , severe drought can affect coconut production, which has been severely damaged after the typhoon Haiyan in 2013. Meanwhile, the two countries that produce 85% of the world's palm oil are Indonesia and Malaysia. drought in some places, but generally the humidity is still normal in April and the first half of May .

Drought in the field in the Philippines.(Photo Reuters.)

El Nino is the cause of the Pacific sea surface temperature to warm up, causing hot weather throughout Asia. This is a dramatic change in sea surface temperature in the tropical belt of the Pacific Ocean, occurring every 2-7 years when trade winds (strong winds blow continuously from the Southeast or Northeast toward equator) begins to weaken. El Nino causes temperatures to rise, causing storms, floods and dryness.