Normal pressure 760 mm Hg. Low atmospheric pressure and relationship with well-being

Man is inextricably linked with nature and adapts well to everything. A healthy person practically does not feel the air pressure on his body. But the polluted ecology and the rhythm of life of some people do not play into their hands, and therefore pressure drops have negative reactions on the body in the form of a deterioration in well-being.

The main thing in the article

What is atmospheric pressure?

Atmospheric pressure is the force of air, with which it presses on the surface of the earth and the bodies on it. Atmospheric pressure depends on the weight of the air, and the magnitude of atmospheric pressure depends on the mass of the air column.

If the amount of air in the column decreases, the pressure drops. An increase in the amount of air in the column leads to an increase in atmospheric pressure. Air presses on one meter of the earth's surface with a certain force of 10033 kilograms. To calculate the norm of atmospheric pressure, pressure indicators are taken at a latitude of 45 degrees at sea level and a temperature of 0 degrees.

Based on these readings, the principle of pressure measurement was built. It is measured using a mercury or metal barometer, the unit of measurement is millimeters of mercury and hectopascals. The earth's surface warms up unevenly, this entails fluctuations in atmospheric pressure. Almost constant pressure

lowered: in equatorial zone, temperate latitudes;
raised: in tropical zones, in the polar zone.

Norm of atmospheric pressure for a person by region of Russia: table in mm Hg

How does high atmospheric pressure affect the human body?

Responding to increased pressure

hypertension
people with allergies
asthmatics and people with respiratory problems

When Atmosphere pressure rises, the weather is clear. You can notice the absence of sudden changes in temperature and humidity. A negative reaction of the body to such changes is detected in allergy sufferers and hypertensive patients. In large cities, when the weather is calm, air pollution increases. People with diseases respiratory organs, will feel unwell high blood pressure atmosphere.

You need to know that with increased atmospheric pressure in the blood, the number of leukocytes decreases. If you have poor immunity, try not to pick up an infection at this time.

The effect on the body of high atmospheric pressure:

Headaches
Vasospasm
Heartache
Nausea, often dizzy
reduced immunity
"Flies" before the eyes
Illness and disability.

How does low atmospheric pressure affect the well-being and health of a person?

Who will feel the low atmospheric pressure:

cores
People with intracranial pressure

With reduced pressure, the amount of precipitation increases, the wind increases and the temperature decreases.
Low blood pressure affects health in the following ways:

The body feels weak.
Suffer migraines.
There is not enough oxygen, shortness of breath appears, the heartbeat quickens.
Pain in the intestines, increased gas formation.
Edema appears.
The limbs may become numb.
Decreased blood flow. Against this background, blood clots occur, which is fraught with strokes and heart attacks.
Dizziness.

What is weather dependence and its symptoms?

Meteorological dependence is a change in well-being due to a change in weather conditions.
The main factors in which well-being changes:

Atmosphere pressure
Air humidity
Air temperature
Motion air masses
geomagnetic radiation
Air ionization.

The main factor in changing well-being is still pressure drop. With such fluctuations, the state of health usually worsens and the following symptoms may appear:

Headache
Drowsiness
Cardiopalmus
Numbness of the limbs
Dizziness and nausea
Problems with the gastrointestinal tract
Circulatory disorders
It's getting hard to breathe
visual impairment
Joint pain
Exacerbation of existing chronic diseases

Quite often hesitation atmospheric air is associated with changes in weather conditions, therefore, before a thunderstorm, rain and windy weather, weather-dependent people feel worse.

The reaction of weather-dependent people to changes in atmospheric pressure

For and the response to a change in atmospheric pressure will be different.
If atmospheric cyclone low, hypotensive patients will feel:

Headaches
indigestion
Difficulty breathing.

Hypertensive patients will not feel much of anything, in rare cases, a slight malaise.
If atmospheric cyclone high, then hypotensive patients will not react strongly to this. Hypertensive patients feel:

Headaches
Noise in ears
visual impairment
Heart pain.

Video: The impact of atmospheric pressure on human health

Having studied the reasons for the deterioration of well-being and the body's reactions to pressure drops, weather-sensitive people can help themselves a little. With a negative reaction to an increase in atmospheric pressure, you should do gymnastics in the morning and take a contrast shower. Eat foods rich in potassium, rest more often. At low atmospheric pressure, reduce physical activity, drink more fluids and go to bed earlier. And also spend more time on your health.

Man is part of nature. It constantly affects each of us. The more time passes, the more weather-sensitive people appear. Today, there are approximately 4 billion such people on the planet. The factor that most strongly affects the health and well-being of a person is atmospheric pressure, or rather its norm. What atmospheric pressure is considered normal depends on geographical location the area where the person lives most time.

What is atmospheric pressure?

The earth is habitable due to a number of factors. The first of these is the availability of air for breathing. Our planet, like a dome, is covered with an atmosphere consisting of many layers, each of which performs a certain task. important function. The air mass exerts constant pressure on everything that is on Earth, including humans, so it is so important to know what its norm is. Every day, each of us withstands a load of approximately 15,000 kg. We do not feel this load due to the unique structure of our body. But not always he can cope with natural phenomena. Sometimes there is an imbalance in the system of organs of the human body, and then a person becomes dependent on changes in atmospheric pressure.

Atmospheric pressure, which is the norm for a person living in central Russia, is 750-760 mm Hg. This is the indicator at which most people do not feel discomfort in their state of health.

Any deviation of a person's atmospheric pressure from the norm by 5-10 units or more will be painfully accepted by our body.

Atmospheric pressure measurement

To measure the norm of atmospheric pressure for a person, a specially designed device is used - a barometer. Science has established that the pressure force of the atmosphere per 1 sq.cm. surface of the Earth, corresponds to the height of the mercury column of 760 mm. This indicator was taken as the norm of atmospheric pressure for a person. If the reading on the barometer is above this mark, it is customary to talk about increased pressure from the norm. If the atmospheric pressure for a person is below normal, then it is considered low. barometer readings in different points planets differ due to differences in topography, temperature, and so on.

The rate of atmospheric pressure for a person is measured in mm of mercury (mm Hg). Other units may be used, such as pascals (Pa). An indicator of 760 mm Hg will be equal in this case to 101325 Pa. However, in ordinary life, the measurement of the norm of atmospheric pressure for a person in pascals did not take root. Any weather forecast informs us about the state of atmospheric pressure using mm Hg.

What is weather sensitivity?

A lot of people have the so-called meteosensitivity. This is a kind of reaction of the body to a change in the norm of atmospheric pressure for a person. It can be expressed, depending on the presence of various health problems, in the appearance of irritability, pain in various parts body, a general decrease in efficiency, insomnia. A change in the normal atmospheric pressure for a person can manifest itself in mental disorders, for example, a state of anxiety, depression, unreasonable fear.

According to statistics, during sudden changes in the weather, even the number of offenses and accidents in transport, as well as man-made disasters, grows several times.

The human body is a kind of chemical laboratory that works normally at the appropriate rate of atmospheric pressure for a person. As soon as these conditions change in any direction, the body reacts with painful manifestations. He lacks something, for example, oxygen. Or vice versa, something in excess.

The causes of meteosensitivity are not only health problems, but also an unhealthy lifestyle. An important role is played by sedentary activity, malnutrition, followed by the acquisition of excess weight, stress.

Influence of human atmospheric pressure

In the vessels and cavities of the human body, there are specific receptors that are very sensitive to any changes in the atmospheric pressure norms for a person. So, for example, people with disorders of the musculoskeletal system always "predict" weather changes by aching joints. Hypertension for headaches in the temples, etc.

The well-being of the cores also worsens with changes in the normal atmospheric pressure for a person. They feel pain in the heart and head, heart palpitations and other unpleasant symptoms.

High atmospheric pressure forces the human body to equalize the resulting imbalance. How does this happen? By lowering blood pressure. This relaxes the blood vessels and changes the speed of blood flow. There is malaise, headaches, stuffy ears. At elevated atmospheric pressure, changes occur in chemical composition blood, in particular, the level of the main fighters against infections and viruses, leukocytes, decreases.

Low atmospheric pressure creates conditions for the body that are close to climbing a mountain. Under such conditions, there is a lack of oxygen, and, consequently, the brain and other organs suffer from hypoxia. At the same time, a person feels difficulty in breathing, pain in the temporal region, pressure on the head.

Scientists have found out the dependence of atmospheric pressure on air temperature. With warming, atmospheric pressure decreases. This is unfavorable for hypotension and asthmatics.

With the onset of cold weather and the establishment of clear weather, respectively, the norm becomes high. Hypertension sufferers, allergy sufferers, kidneys.

The most dangerous thing is a sharp increase in atmospheric pressure (by 1 mm Hg in 2-3 hours). The patient sharply feels negative symptoms, feels very bad. It is imperative to control the pressure, immediately take the medicines prescribed by the doctor.

A person cannot influence the weather, but help himself survive difficult periods can.

The first thing to do as much as possible is to reduce physical activity.

Secondly, consult a doctor about prescribing normal medications for those who are especially hard on weather changes.

The optimal combination of weather indicators for a person is as follows:

Atmospheric pressure - 760 mm Hg is normal.
The air temperature is the norm 18-20 ͦ С.
Humidity is normally 50-55%.

At different points on the Earth, the norm of pressure can be different. The recorded fluctuations at sea level are 641-816 mm Hg. The average value is exactly 760 mm Hg at 20 degrees Celsius. This does not mean that for each person this indication should be equal to the norm. If a person was born and raised in the mountains, the norm figures for him, of course, will be different. Climbing the mountains will give a decrease for each kilometer of altitude by about 13%.

The average value of atmospheric pressure for St. Petersburg, located in the north-west of Russia, is only 748 mm Hg.

It is time that can greatly affect the patient's atmospheric pressure indicators. It is higher at night than during the day. That is why most heart attacks occur at night.

Since 1982, a standard pressure of 100 kPa has been adopted.

Naturally, what to choose for yourself ideal conditions impossible. How many people, so many problems. Everyone is concerned about certain violations, so it is important to prepare yourself and your body for weather changes and take care of your health.

Most people are aware of the impact weather and pressure have on overall well-being. Headaches and other symptoms of malaise that come along with a change in the weather have even been nicknamed the special term “weather dependence”. Consider what is the norm of atmospheric pressure for a person is considered optimal, and what to do with your condition when the pressure changes.

What atmospheric pressure is considered normal?

Everyone knows that the earth is surrounded by a dense air mass called the atmosphere. for any subject and Living being on the planet "presses air" with a certain weight. Due to the peculiarities of the structure of the human body, this " air weight' is not felt.

Having carried out certain mathematical calculations and comparing the atmospheric pressure in different corners the globe, scientists came to the conclusion that the norm of atmospheric pressure ranges from 750 to 760 mm. rt. Art. The scatter of these parameters is explained by the uneven relief in different parts Sveta.

What is weather dependence?

Exist different types people: some are able to painlessly withstand climbing mountains or many hours of flights on board an airplane, while for others, a change in weather causes severe headaches and deterioration in general well-being. To define this pathological condition, a special term "meteorological dependence" (otherwise - meteopathy) was developed, which indicates the relationship of the symptoms that appear with atmospheric pressure, humidity and other weather conditions.

How do changes in atmospheric pressure affect the patient?

With pressure drops in the atmosphere, the pressure in the vessels and cavities of a person begins to change. They contain special baroreceptors that respond to changes in pressure. They are located on the peritoneum, pleura, internal capsule of the joints, in the vessels and in other places. That is why patients with joint diseases can almost always predict changes in weather and pressure by how their joints “ache and twist”.

The deterioration in the well-being of people with diseases of the heart and blood vessels is also associated with a change in pressure and irritation of these receptors. They begin tachycardia, pain in the heart, the rhythm breaks and the head hurts. If the patient has a history of lung or pleural disease, then high pressure will remind you of pain in chest and a feeling of heaviness in the chest.

When there are problems with digestive system, then the baroreceptors of the peritoneum can respond to a change in pressure with flatulence, bloating, heaviness in the epigastrium and problems with the stool. Excruciating migraine-type headaches begin in patients if high blood pressure is combined with a previous traumatic brain injury or aneurysms. People with chronic otitis media or sinusitis begin to worry about the unpleasant symptoms of heaviness and fullness at the time of the weather change.

Important! The severity of the manifestation of a symptom depends on the individual sensitivity of the person and his emotional stability.

If the pressure in the atmosphere drops sharply, then even quite healthy people can experience headache attacks due to oxygen starvation of brain cells. The optimal pressure for a person is the average pressure of the geographical region where he grew up or lives for a long time.

How can you reduce the effect of pressure on the body?

Normal atmospheric pressure is considered to be 760 mm. rt. st, but comfortable for a particular person can be 755 mm Hg. and even 750 mm Hg.
If a person has problems with weather sensitivity, then you can try to reduce it by the following measures:

Treating the underlying disease hypersensitivity to pressure.
Improving the adaptive capabilities of the body by maintaining a healthy lifestyle, normalizing nutrition and rest, hardening, etc.

It has been shown that the response to natural phenomena lies lability and hyperexcitability nervous system. In conditions of chronic stress, vegetative-vascular disorders and neurasthenia have become constant companions of most people who respond to pressure.

Another factor of meteorological dependence is the lack of sufficient fresh air and a sedentary lifestyle. Residents of small towns and villages are practically unaware of the reaction to pressure, unlike their brothers from megacities.

Nutrition and mode

One factor that influences the development of pressure sensitivity is excess weight. Obese patients are more likely to suffer from heart and vascular diseases and, accordingly, are more likely to respond to weather disasters. If the patient decides to cope with this disease, then first of all you need to reconsider your lifestyle and diet:

A complete and balanced diet with a normal content of vitamins and microelements.
Refusal or restriction of the use of alcohol and nicotine.
During an attack, you need to switch to a light milk-vegetarian diet to help the body cope with the disease.

Separately, it is worth mentioning the use of adaptogens - drugs that increase the body's natural adaptive ability. They are of vegetable and synthetic origin. Some of the most famous adaptogens are ginseng, eleutherococcus, bee products and antler preparations. reindeer. Before taking them, you need to consult a doctor, since there are a number of contraindications and side effects.

Physiotherapy

Healing baths and mud have a good effect. In addition, any water procedures (circular shower, wiping cold water, swimming pool) cause a positive effect and increase the reserve capacity of the body.
Essential oils have positive tonic and soothing properties. You can perform inhalation with essential oils of citrus and coniferous plants, mint, rosemary and other substances or have an aromatherapy session.

Sensitivity to changes in pressure is an unpleasant condition that disrupts the usual well-being and interferes with full life. To avoid this, you need to increase the natural resistance of the body and monitor health.

Have you ever thought about why on some days you feel worse and lethargic, although everything seems to be going on as usual? Perhaps you even associated this with worsening weather conditions, noticing that bad weather worsens diseases. However, it remains unclear exactly how bad weather displayed on health. The answer is simple - it's all about the effect of atmospheric pressure on a person.

about atmospheric pressure

Atmospheric pressure is the force with which air presses on the surface of the Earth, as well as on all objects that are on it. It is constantly changing and depends on the height and mass of air, its density, temperature, direction of circulation of flows, height above sea level, latitude.

It is measured in the following units:

torr or millimeter of mercury (mm Hg);
pascal (Pa, Ra);
kilogram-force per sq. cm;
other units.

To measure atmospheric pressure, you will need mercury and metal barometers.

Which atmospheric pressure is low and which is high

The impact of the atmosphere decreases as the temperature rises (in summer) and increases as it falls (in winter). It also decreases after 12 hours and after 24 hours, and rises from morning to evening.

On the high points a smaller layer of air presses on the surface of the Earth than on low ones, so the severity of the atmosphere at such points is less. At points closer to the poles, the atmosphere presses harder due to the cold. Therefore, it became necessary to define a starting point. As a norm, it is customary to consider an indicator at sea level and a latitude of 45 °.

Important! Normal atmospheric pressure is 760 mm Hg. Art. or 101 325 Pa.

Video: atmospheric pressure Accordingly, if the pressure is more than 760 mm Hg. Art., it will be increased for meteorologists, if less - reduced. However, this statement does not apply to specific people. Normal atmospheric pressure is a conditional concept, it does not mean optimal for a person.

People live in different climatic zones, at different latitudes, at different heights above sea level, so they feel on themselves different strength gravity of the air, so it is impossible to determine the optimal level for everyone.

We can only say that for a particular person, the optimal level will be that which is the norm (taking into account the height above sea level and other factors) for the area in which he lives.

In other words, the pressure that would be considered normal for the inhabitants of Africa in the equatorial region may be lowered for the inhabitants of the Arctic if they come to Africa on an excursion.

Influence and relationship with the human body

About ¾ of the world's population are weather dependent and react to a decrease in atmospheric pressure with a deterioration in well-being. Weather-dependent people feel the fluctuations of the mercury column when it is about 10 mm.

The deterioration of well-being at low atmospheric pressure is primarily associated with a reduced oxygen content in it and an increase in air pressure inside us.

Important! An average of 12 to 15 tons of air presses on each person, which does not crush people due to the fact that there is also air inside us that presses with equal force.

Video: the influence and relationship of atmospheric pressure with the human body The state of health deteriorates due to the fact that the air inside a person tends to come into balance with the air around him and leaves the body. Therefore, in space, where there is no atmosphere, without a spacesuit, all the air will come out of a person.

The liquid boils in the presence of air resistance at +100 ° C, when it weakens, the temperature drops. If you rise to a height of 19,200 m above sea level, the blood in the body will boil.

Distinguish 3 types of addiction:

Straight- when blood pressure rises following an increase in atmospheric pressure, and vice versa. This type is familiar to hypotensive patients, whose blood pressure is usually below normal.
Reverse- when blood pressure falls when atmospheric pressure rises, and vice versa. Basically, this is typical for hypertensive patients.
Incomplete reverse- when only the upper or lower blood pressure changes. Yes, change meteorological conditions may affect people who are not normally familiar with hypertension or hypotension.

The gravity of the atmosphere decreases before the deterioration of weather conditions, this is manifested in humans by the following symptoms:

nervousness;
migraine;
lethargy;
aches in the joints;
numbness of fingers and toes;
labored breathing;
accelerated heartbeat;
vasospasm, circulatory problems;
blurred vision;
nausea;
suffocation;
dizziness;
rupture of the eardrum.

Why is low atmospheric pressure dangerous?

The mechanism of influence of the reduced gravity of air manifests itself in the following way:

The humidity in the air rises and it becomes more difficult to breathe.
The air becomes lighter because there is less of it, that is, the amount of oxygen contained in it also decreases. Oxygen starvation sets in.
Brain cells, heart, blood vessels, and respiratory organs suffer from a lack of oxygen.
Oxygen starvation of brain cells causes changes in the mental state - euphoria is replaced by apathy and depression.
As a result, the head begins to hurt, and conventional medicines cannot relieve this pain. The person feels dizzy, nauseous, weak.
A reflex reaction of the body to a decrease in oxygen supply is rapid breathing.
On the other hand, the intense work of the respiratory organs causes an increase in oxygen demand. In this case, due to the greater number of exhalations, more carbon dioxide leaves the body. In response to this, the respiratory center weakens the load, the number of breaths decreases.
An accelerated heartbeat leads to an increase in the number of heart attacks. Blood begins to flow with greater force through the vessels, blood pressure rises.
On the other hand, in response to a decrease in oxygen in the blood, more red blood cells are produced to carry more oxygen. The blood thickens internal organs increase, it becomes more difficult for the heart to pump blood, it flows more slowly through the vessels, blood pressure drops.
A drop in blood pressure worsens the well-being of not only hypotensive patients, but also hypertensive patients who take medication to lower it.
Thickening of the blood impairs its flow through small vessels, the blood supply to the joints and extremities worsens, aching joints and numbness of the extremities appear.
The deterioration of blood supply and brain function reduces visual acuity.
The air pressure inside the body increases - in the gastrointestinal tract, this causes the diaphragm to rise and the lungs to contract, that is, breathing becomes difficult. The same reason can cause a rupture of the eardrum.
The resistance of the skin increases, the body feels stress, produces more stress hormones, and the number of leukocytes in the blood increases.

A decrease in the gravity of the air negatively affects the well-being of most people, so such indicators should be carefully monitored. To reduce the negative influence, on such days one should lead a more calm and healthy lifestyle life.

From what pressure in the atmosphere on this moment, sometimes a person’s well-being depends very much, because the atmosphere of our planet puts pressure on everything that is inside it. Atmospheric pressure affects the health and well-being of a person, so scientists of various specialties identify these changes and monitor atmospheric pressure, which is subject to constant fluctuations. In our material, we will tell you what is the normal atmospheric pressure for a person in mm of mercury and pascals.

What does atmospheric pressure depend on?

First, let's look at what atmospheric pressure is. This is the pressure force of the air column on a certain unit of surface area.

The ideal conditions for measuring atmospheric pressure are 45 degrees latitude and 0°C air temperature. The measurement must also be taken at sea level.

But it is worth noting that due to changes in the height of the terrain above sea level, atmospheric pressure will also change. But at the same time, it will also be considered the norm, so each locality has its own normal atmospheric pressure.

Atmospheric pressure also depends on the time of day: at night, atmospheric pressure is always higher, as the air temperature is lower. But a person does not notice this, since the difference is 1-2 mm Hg. In addition, in areas that are close to the poles of the earth, fluctuations in atmospheric pressure become more noticeable. But there are no fluctuations at the equator.

What is normal atmospheric pressure for a person

It is generally accepted that normal atmospheric pressure in mmHg is 760 mmHg. That is, a column of air presses on 1 square centimeter of area with such force as a column of mercury 760 mm high. This is the norm of the Earth's atmospheric pressure, which does not adversely affect the human body.

A person does not feel normal atmospheric pressure due to dissolved air gases in tissue fluids, which balance everything. But at the same time, it still exerts pressure on us, equal to 1.033 kg per 1 square centimeter of the body.

But each person must individually understand what atmospheric pressure is considered normal for health, since this largely depends on the adaptation of the person. For example, many people can safely climb the top of a mountain without feeling the change in barometric pressure, while others faint from rapid changes in barometric pressure.

Only a sharp fluctuation in blood pressure can significantly affect a person’s well-being if atmospheric pressure rises or falls faster than 1 mm Hg. pillar for 3 hours.

Note also that millimeters of mercury is not a standard unit of change in blood pressure. In the world it is customary to recognize the norm of atmospheric pressure in pascals. 100 kPa - normal atmospheric pressure for a person in pascals. A 760 mm Hg. column is 101.3 kPa.

Normal atmospheric pressure for Moscow

Capital Russian Federation is situated on Central Russian Upland. There is always low pressure in Moscow, because the city is above sea level (the maximum point above sea level is 255 meters in Teply Stan, and average- 130-150 meters above the sea surface).

The norm of atmospheric pressure in Moscow is 746-749 mm Hg. It is very difficult to give an accurate result, since the relief in the capital of Russia is uneven. Also, the normal atmospheric pressure per person in Moscow is affected by the time of year. The norm of atmospheric pressure always rises slightly in spring and summer, and decreases in winter and autumn. If you constantly live in Moscow, then you will feel comfortable with blood pressure in Moscow from 745 to 755 mm Hg. pillar.

Normal pressure in St. Petersburg

Height northern capital above sea level is less than the height of Moscow. That's why Therefore, the norm of blood pressure is slightly higher here. Normal atmospheric pressure in St. Petersburg ranges from 753 to 755 mm Hg.

The most low-lying districts of St. Petersburg are characterized by the "classic" norm of blood pressure. The maximum pressure in St. Petersburg can approach 780 mm Hg - such an increase can lead to a powerful anticyclone.

Atmospheric pressure norm by region

It is known that each specific area corresponds to certain normal indicators of atmospheric pressure. The indicator changes according to the height of the object above sea level. The change in indicators occurs due to the movement of air masses between areas with different pressures. Atmospheric pressure changes due to uneven heating of air above the surface of our planet. A number of factors influence:

Landscape Features
Planet rotation
The difference in heat capacity of water and earth's surface
Differences in the reflectivity of water and earth

As a result, cyclones and anticyclones are formed, forming weather terrain. Cyclone means fast-moving eddies with a low level of blood pressure. The summer cyclone is rainy and cool weather, in winter it is warming and snowing. The anticyclone is characterized by high atmospheric pressure, in summer they bring dry and hot weather, in winter - frosty and clear.

The lowest atmospheric pressure is at the equator, and the lowest in the North and south poles. The value of atmospheric pressure fluctuates and depending on the time of day - the highest at 9-10 and 21-22 hours.

Even within a small area, atmospheric pressure measurements can vary. For example, for Central Asia normal blood pressure is 715-730 mm Hg. And for Middle lane Russian fluctuations in blood pressure at the level of 730-770 millimeters of mercury. In Mexico City, the capital of Mexico, the atmospheric pressure can drop to 580 mm Hg, since the city is located over 2000 meters above sea level. And the atmospheric pressure in China is even lower: for example, in the Tibetan city of Lhasa, the average annual blood pressure is approximately 487 mm Hg. pillar. The city is located 3500 meters above sea level.

Normal atmospheric pressure for Russian regions in mmHg

IN winter months over most of the territory of the Russian Federation there is an increased level of atmospheric pressure. The highest blood pressure during this period is observed over the Mongolian Altai and Yakutia - about 772 mm Hg. The lowest pressure in the areas over the Barents, Bering and Okhotsk seas is 753 mm Hg. For Vladivostok, normal blood pressure is 761 mm Hg

As we have already said, atmospheric pressure can vary significantly within the same region. Even the indicators of Moscow and the Moscow region may differ, since they have slightly different heights above sea level. Therefore, we provide data for normal atmospheric pressure according to Russian cities. But it should be remembered: even within the same city, the data may vary slightly, depending on the elevation of the area.

Norm of atmospheric pressure in Russian cities: table
	Atmospheric pressure is normal (mm Hg)

Rostov on Don
St. Petersburg

Ekaterinburg


Chelyabinsk

Yaroslavl
Vladivostok

How to measure atmospheric pressure

Atmospheric pressure in a particular area is measured either with the help of special instruments: a mercury barometer, an aneroid barometer, a liquid and electronic barograph, or by a special formula, if the height of the area and the pressure at sea level are known.

The formula for determining pressure is as follows: P=P0 * e^(-Mgh/RT)

PO - pressure at sea level in Pascals
M - molar mass of air -0.029 kg / mol
g - Earth's free fall acceleration, approximately 9.81 m/s²
R - universal gas constant - 8.31 J/mol K
T is the air temperature in Kelvin. Measured by the formula: t Celsius + 273
h - height above sea level in meters

A mercury barometer is a glass tube, approximately 80 cm long, containing mercury. This tube is sealed on one side and open on the other, the open end is immersed in a bowl of mercury. The height of the column of liquid, starting from the level of the cup, will report on the atmospheric pressure at the moment. It is not safe to use such devices, therefore they are used mainly in laboratory conditions, at meteorological stations and at industrial facilities, where measurement accuracy is very important. Electronic barometers are often used in everyday life, digital weather stations can be used even in camping and home conditions, and they are inexpensive.