(PLO)- If the sea surface temperature of the eastern Pacific Ocean increases by 0.1 degrees Celsius, El Nino will appear. Hot sun and severe drought will hit Vietnam.
In the first week of May, sea surface temperatures in the central and eastern equatorial Pacific are 0.4 degrees Celsius higher than the multi-year average. Thus. With this development, only an increase of 0.1 degrees will cause El Nino phenomenon to occur, directly affecting Vietnam.
El Nino . Probability
According to the National Center for Hydro-meteorological Forecasting, El Nino occurs every 3-4 years. With recent climate developments, the probability that El Nino will appear in late May or early June is about 70-80%.
In the years when El Nino reappears, in the western Pacific region where Vietnam is located on the western edge, storms and tropical depressions will be less than the average of many years. The number of cold air waves affecting our country is also less than usual.
However, strong El Niño events can cause record high temperatures in many places, reduce rainfall in most areas, but increase precipitation variability in Vietnam.
Due to the influence of El Nino, the heat will occur more and more intensely. Photo: PHILOSOPHY
In the past few days, our country has recorded a record of hot weather exceeding historical milestones. In which, on May 6, Hoi Xuan meteorological station (Thanh Hoa) recorded 44.1 degrees; Right after that, on May 7, Tuong Duong station (Nghe An) recorded 44.2 degrees.
Both indexes surpassed the record of 43.4 degrees on April 20, 2019 in Huong Khe (Ha Tinh).
In a report sent to the National Steering Committee for Natural Disaster Prevention and Control on May 8, the General Department of Meteorology and Hydrology (Ministry of Natural Resources and Environment) forecast that, due to the influence of the El Nino phenomenon, the monthly temperature in 2023 is expected to Forecasts tend to be higher and heat waves are more likely and more intense than average.
Drought warning from North to South
The record heat is accompanied by drought. According to the General Department of Meteorology and Hydrology, from the beginning of the year until now, the total rainfall across the country is generally lower than the average of many years. As a result, flows in rivers, streams and reservoirs all decrease by 10-30%.
This is a sign that the risk of water shortage and severe drought may appear in the near future.
Specifically, with the Northern regionIn May, the water source to large reservoirs and rivers and streams upstream of the Red River system decreased by 20-40% compared to the average of many years. Flow to reservoirs on Da river, Gam river and Chay river is less than 10-30%; On the Thao and Lo rivers, there is a shortage of 20-50%.
Fortunately, the flow to Hoa Binh Lake is larger than average for many years due to the additional water supply upstream reservoirs.
With North Central region, the total flow to large hydroelectric reservoirs in the region is 15-35% lower than the average of many years. Therefore, at the peak of the coming dry season, with prolonged hot weather, there is a high risk of drought and water shortage in places outside the water supply area of irrigation works, extending from Thanh Hoa to Ha Tinh.
LIVE Central region, the total flow to large hydroelectric reservoirs in the region is 15-40% lower than the average for many years. Therefore, from June to August, there is a risk of drought and local water shortage in places outside the water supply areas of irrigation works and saline intrusion in the provinces from Quang Binh to Quang Nam.
South Central region, the total flow volume in rivers is 20-50% lower than the average for many years, the water in large hydroelectric reservoirs in the region is 10-20% lower than average. Therefore, from June to August, from the provinces of Phu Yen to Ninh Thuan, there will be a risk of drought and lack of water in places outside the water supply areas of irrigation works.
With Highlands region, the total flow to large hydropower reservoirs is 10-25% lower than the average of many years. During this period, there is a risk of drought and local water shortage in places outside the water supply areas of irrigation works in Kon Tum, Gia Lai, and Dak Nong provinces. From May to July, the total flow volume in rivers in the Central Highlands is 15-25% lower than the average of many years.
Southern regionFrom May to July, water from the Mekong River to the lower Mekong Delta tends to increase gradually. However, the water level is still 10-20% lower than the average for many years.
After a record 44 degrees of heat, rain and wind blew away the roofs of thousands of houses
(PLO)- Thunderstorms and gusts of wind in many parts of the country since last night have left one person missing, more than 1,000 houses torn off and damaged.
Hot weather in Vietnam sets a new record, in some places 44.1 degrees Celsius
(PLO)- The temperature at 16 pm on May 6 at Hoi Xuan station (Thanh Hoa) was measured at 43.8 degrees, sometimes up to 44.1 degrees Celsius.