Weather Experts Explain Low Pressure Warning
Dr. Nguyen Ngoc Huy, an expert in drought, flood, extreme weather events, climate change, and livelihoods, issued a warning: On June 13th and 14th, atmospheric pressure in Hanoi and surrounding areas will drop significantly, leading to hot and humid conditions.
Low Atmospheric Pressure
Atmospheric pressure in Hanoi, as well as neighboring provinces such as Bac Ninh, Bac Giang, Vinh Phuc, Hai Duong, Ha Nam, Ninh Binh, Thanh Hoa, and Thai Binh, will drop to 998hPa. Normal atmospheric pressure, considered beneficial for human health, ranges from 1007-1013hPa.
Atmospheric pressure, or air pressure, is the weight of the entire air column exerted on a unit area. At ground level, average atmospheric pressure ranges from 1000-1020mb, gradually decreasing with altitude.
According to the National Technical Regulation on Meteorological Observation, the unit of measurement for atmospheric pressure is hectopascal (hPa). This unit is widely used in meteorology and environmental measurements. Hectopascal (hPa) is also extensively employed in the pressure measurement systems of the National Aeronautics and Space Administration (NASA) and the World Meteorological Organization (WMO).
Besides hPa, other common units of measurement for atmospheric pressure include millibar. This unit is recognized and regulated by international measurement organizations such as the National Institute of Standards and Technology (NIST) and the World Customs Organization (WCO). The choice of measurement unit may vary depending on the country or region.
The relationship between these units is as follows: 1 bar = 1000 hPa = 1000 mb.
Effects of Atmospheric Pressure on Health and Environment
The weight of air varies depending on temperature, altitude, density, and humidity in the atmosphere.
Atmospheric pressure is measured using a barometer. In a barometer, the column of pressure represented by mercury in a glass tube rises or falls with changes in atmospheric weight. Increasing atmospheric pressure typically indicates better weather, while decreasing pressure often signifies worsening weather conditions.
Atmospheric pressure plays a crucial role in human health and the surrounding environment. It allows water, animals, and plants to sustain life on Earth.
Atmospheric pressure regulates Earth's temperature by preventing water vapor from evaporating too quickly. It also transports oxygen from the air into our bodies through the respiratory system.
Fluctuations in atmospheric pressure can lead to weather changes such as rain, wind, storms, and tornadoes.
In Vietnam, the weather is primarily influenced by major pressure systems that operate year-round and seasonally active pressure centers.
Health Risks Associated with Changing Atmospheric Pressure
Atmospheric scientists suggest that changes in atmospheric pressure can pose risks to human health.
Low atmospheric pressure, combined with still air and oppressive heat not caused by direct sunlight, can induce discomfort, lower blood pressure, and lead to symptoms like headaches and dizziness. It can also trigger a sensation of overheating with difficulty sweating.
According to An ninh Thu Do, sudden drops in atmospheric pressure can trigger relapses or worsen cardiovascular conditions. Research indicates that as atmospheric pressure decreases, the air contains more positive ions, which can impair concentration, worsen mood, and heighten feelings of anxiety and restlessness. Statistics show an increased incidence of accidents, mental health issues, and relapses of chronic conditions when atmospheric pressure drops significantly.
Sức khỏe & Đời sống recently quoted Dr. Nguyen Ngoc Huy, who noted that this period precedes the summer solstice, during which the sun's exposure is at its peak. Therefore, the elderly, children, and those sensitive to weather conditions should limit their outdoor exposure during sunny hours.
Dr. Huy also urged the public to use electrical appliances efficiently to prevent overloading the power system. He specifically advised against setting air conditioners below 26 degrees Celsius and using one air conditioner for the entire household during peak hours. Additionally, using multiple electrical appliances concurrently during peak hours should be avoided.
Summary
On June 13th and 14th, Hanoi and surrounding areas will experience hot and humid conditions due to decreased atmospheric pressure. Low atmospheric pressure can lead to discomfort, health risks, and adverse environmental effects. Experts recommend precautions such as limiting outdoor exposure, using electrical appliances responsibly, and monitoring health conditions.