Flame Yan! 183 National Meteorological Stations Across the Country: Daily Maximum Temperature Breaks Monthly Extreme Temperature | History | Countries
The reporter learned from the National Climate Center of the China Meteorological Administration that since June this year, a total of 183 national meteorological stations in China have exceeded the monthly maximum temperature, 46 stations have exceeded the historical maximum temperature, and the daily maximum temperature in North China has exceeded the historical maximum temperature on June 22. Since June this year, the number of hot days in North China has been 6.4 days, 3.1 days more than the same period in normal years, ranking fifth in history since 1961, only behind 1972, 1968, 2005, and 2022. Beijing has the highest number of cities in the same period since 1961, followed by Hebei and Tianjin.
Meteorological monitoring shows that from 8:00 to 16:00 yesterday, the highest temperature at 17 national meteorological observation stations in Beijing, Tianjin, Hebei, and Shandong exceeded historical extremes. Yesterday evening, the Central Meteorological Administration issued the first high-temperature orange warning of the year.
Zhang Fanghua, Chief Forecaster of the Central Meteorological Observatory: The causes of the recent high temperature weather in North China, Yellow River and Huaihe River mainly include the following four aspects. Firstly, in the lower levels, it is controlled by a warm air mass, which is relatively strong and lasts for a long time.
Secondly, from the perspective of weather conditions, the high altitude in this area is controlled by a high-pressure ridge. Therefore, under the control of the high-pressure ridge, there is less cloud cover in the sky and stronger solar radiation, which means stronger sunlight, which is very conducive to the rise of temperature. At the same time, under the control of high-pressure ridges, this type of sinking airflow is also prevalent. Due to the sinking airflow, it can also cause the effect of sinking and warming, resulting in an increase in temperature.
Thirdly, as we have just entered the summer solstice, the daylight hours are relatively long, which means that the daylight hours are longer, which is conducive to the rise of temperature and the sustained and sustained high temperatures.
The fourth point is that in the North China and Huanghuai regions, the relative humidity during the day is relatively low, which means that the air is relatively dry. Therefore, dry air is also conducive to an increase in temperature.
For this sustained high temperature weather, the Public Meteorological Service Center of the China Meteorological Administration reminds that the most direct adverse impact of high temperature weather on health is heat stroke. According to the degree of heat stroke, it can be divided into premonitory heat stroke, mild heat stroke, and severe heat stroke. When symptoms of premonitory heat stroke and mild heat stroke occur, symptoms such as headache, dizziness, thirst, excessive sweating, weakness and soreness in the limbs, lack of concentration, and lack of coordination in movements may occur. If transferred to a cool place in a timely manner and replenished with water, the symptoms will be relieved. But if severe heatstroke occurs, it may cause arrhythmia, coma, convulsions, rhabdomyolysis, acute renal failure, liver failure, hypotension, shock, arrhythmia, heart failure, pulmonary edema, and cerebral edema. Severe heat stroke, especially heat stroke, poses a high risk of death. There are two types of heat stroke, one is exertional heat stroke, mainly caused by the imbalance between heat production and heat dissipation caused by high-intensity physical activity. Healthy young people who engage in intense outdoor activities during summer, such as officers and soldiers, athletes, firefighters, construction workers, couriers, etc. Another type is classical heat stroke, which mainly occurs due to passive exposure to a hot environment causing an imbalance between heat production and dissipation in the body. Commonly seen in young people, pregnant women, and elderly individuals with underlying chronic diseases or immune dysfunction. In addition, stuffy and poorly ventilated indoor spaces, as well as in cars without air conditioning, are also places where heatstroke often occurs.
Under high temperature weather, the human body sweats profusely, causing an increase in blood viscosity and a slowdown in blood flow velocity, leading to an increase in cardiac load and an increased risk of cardiovascular and cerebrovascular diseases.
