Why is Britain foggy, why London is foggy

Western Europe belongs to the temperate oceanic climate, the United Kingdom is an island country, the North Atlantic warm current and the Norwegian cold current meet, and affected by the westerly wind belt, the climate is warm and humid, and the water vapor is rich and easy to form fog; In addition, Britain had developed heavy industry before, and the third scientific and technological revolution had not yet begun, so a large amount of dust was emitted and pollution was serious. So half a century ago, London was known as the capital of fog.

London, the capital of the United Kingdom, is an ancient and modern city. It is not only a famous historical and cultural city and an international financial center, but also known as the "fog capital". The fog here is often pervasive, and for days on end, the air is filled with small white droplets.

The steeple churches on both sides of the Thames, the high-rise buildings have been concealed, and only a few pavilions in the sky remain. The fog also caused problems for the citizens. A heavy fog that occurred on December 5, 1952 lasted for more than four days, and the soot emitted from home heating was shrouded in thick fog for a long time.

Day is like night, and the lights are illuminated. Downtown traffic has come to a halt, residents are feeling chest tightness and breathing, and the marble buildings of Whitehall Street are corroded.

London's fog is related to the local geography and air pollution. The United Kingdom is an island nation in the Atlantic Ocean, and London is located in a basin in the southeast of the United Kingdom. The basin is flanked by east-west ridges on the north and south sides, and the River Thames flows from west to east through the urban area into the North Sea, which is only 88 kilometers from the estuary.

Under the influence of westerly winds and the warm North Atlantic Current, London's climate is warm and humid, with a temperate maritime climate. In autumn and winter, when the westerly wind blows the water vapor of the Atlantic Ocean to the land, the temperature difference between day and night is relatively large, the air in the basin is relatively stable, the flow is not smooth, and the lower air is cold, it often forms a heavy fog, and the cycle repeats itself, and does not dissipate for a long time. Coupled with the rapid development of industry and transportation in London, a large amount of smoke and dust emitted by industrial and mining enterprises and automobiles floated in the air and became a condensation nucleus of fog, which was also a cause of fog.

Since the 80s, thanks to a series of measures taken by the United Kingdom** to strengthen environmental protection, the visibility over London has increased compared to the past, and the average annual sunshine has also increased significantly. The long-extinct bird is back in the skies over London.

1. The temperate oceanic climate and the warm current of the North Atlantic bring a lot of water vapor to the UK, and there is a lot of moisture in the air.

2. The United Kingdom is a modern country with a large population, and the city emits a large amount of waste gas, waste water and waste residue, and there are many impurities in the air, forming many condensation nuclei.

3. The foggy part of the UK is generally London, this is because of the influence of the terrain, there is the Thames River passing, in the river valley area, water vapor is not easy to disperse out of the basin, there is the existence of temperature inversion, is the air is not circulated, and the accumulation forms fog.

The UK is located at the confluence of the North Atlantic Warm Current and the Arctic Ocean Current, and is more north than other European countries. The United Kingdom is an island country, surrounded by the sea and has plenty of moisture.

Britain is also an old capitalist country, and its long-term industrial development burns a large amount of fossil fuels, such as coal, and produces a large amount of carbon dioxide and other gases, which create conditions for the formation of fog. This is also the reason why London is known as the capital of fog.

Today, the use of fossil fuels has decreased, and fog has changed dramatically.

That was before After the Industrial Revolution, Britain's industry has developed rapidly, and the environmental pollution it brings is becoming more and more prominent, and there are more and more dust in the air. Now with the improvement of the environment, it has become much better

Natural causes: The temperate oceanic climate is humid all year round, and it is easy to form fog when it is cold at high latitudes; At the same time, high urbanization and industrial rhetoric have also exacerbated the formation of fog (condensation nuclei that provide droplet formation, and convection of the urban heat island), and London was once crowned the fog capital.

An island country with heavy water vapor.

The UK is at the confluence of the warm North Atlantic Current and the cold Arctic Ocean Current.

The frequent purple fog in London is due to the effects of industrial exhaust gases.

The UK is at the confluence of the warm North Atlantic Current and the cold Arctic Ocean Current.

The frequent purple fog in London is due to the effects of industrial exhaust gases.

There are two reasons for this:

1。There is a lot of moisture.

2。Excessive exhaust gas emissions, the day is humid, and the residue in the exhaust gas falls with the water vapor.

The shore is close to the sea, and there is water vapor.

First of all, because the weather is relatively cold, but because of the developed industry, the heat gathers in the sky, and London is very humid, so when the humid cold air meets the sultry weather, fog is formed.

Since London is located in the Atlantic Ocean in the western part of Europe, it is in a position with a lot of water vapor and temperature.

At the confluence of the higher Mexicango Bay Warm Current with the cold, dry East Greenland Current, the air mass on the Gulf Stream is warm and humid and light, and when it rises along the slope of the cold, dry air mass above the cold current, the water vapor condenses near the ground to form a thick frontal fog due to the decrease in temperature. That's why London is foggy. Foggy days.

London is known as the world-famous "fog capital", and it is famous for its frequent fog in autumn and winter. Although the fog of London caused difficulties in transportation and navigation, it was not without its benefit, and in the Second World War, the fog played a great role in protecting the city and eliminating fascism.

At the end of July 1940, fascist Germany attempted to launch an air offensive against Britain. The German Air Combat Command mistakenly believed that the fog in London could limit the take-off of British aircraft; The chimney protruding above the fog is a good target.

But every time the Luftwaffe fleet took off, it was either intercepted by a strange "bomb net" on the way, or it was fiercely attacked by the British Air Force before it could all take off, and several sneak attacks ended in failure.

At one time, the Luftwaffe, having received a meteorological report of fog in London, immediately took off. However, before arriving in London, the group lost contact with each other due to heavy fog and could not see the direction clearly, and was shot down by British planes following behind the fog, causing heavy **, and most of the group was killed.

It turns out that Germany and Britain are under the control of the westerly wind belt, and their weather changes are developing from west to east, and Britain is right in the west of Germany, so it is easy to find out the weather changes in Germany, but Germany cannot measure the weather conditions in Britain. In this way, Britain took advantage of the measurable weather forecast in Germany and took the initiative to attack.

Whenever it was foggy, Britain used the fog curtain to prepare for battle, and when the fog area moved eastward, British planes followed behind the fog to intercept German planes. Sometimes, the fog was used as a barrier, and a large number of bombs tied under the parachute by 100-meter-long wires were dropped by the planes in the fog-shrouded section of the German plane's route to the United Kingdom, which became a "bomb net" on the route.

Because the bomb was suspended under a 100-meter-long wire and protected by heavy fog, it was difficult for the aircraft to detect it. Such bombs terrified German pilots. Because bombs always come with fog, they are called strange fog bombs.

Fog is a small droplet of water floating in the air. When the temperature of the atmosphere containing water vapor near the ground drops so that the atmospheric water vapor exceeds the saturation, the excess water vapor condenses into small water droplets near the ground and at low altitudes, so that fog is formed.

In addition, because London is located in the Atlantic Ocean in western Europe, at the intersection of the warm Gulf Stream with a large amount of water vapor and high temperature and the cold and dry East Greenland Current, the air mass on the Gulf Stream is warm and humid and light.

That's why London is foggy. It was this thick fog that made a "miraculous contribution" for the defense of London.

Between 5 and 9 December 1952, 4,000 people were killed by the London smog incident,** which led to the introduction of the Clean Air Act in 1956, which banned the use of smoke-producing fuels in parts of London. Since the 80s of the 20th century, due to a series of measures taken by the United Kingdom**, London's air quality has been significantly improved.

It's the smog, saying how big the smog in Beijing is now, in fact, they don't look directly at the haze weather in the United Kingdom, the first country in the West, when the smog weather in London was serious, it was really out of sight, and the most serious accident was caused by thousands of deaths, the Los Angeles smog incident is also a similar experience, and the smog weather in Beijing can not reach such a level.

1 Natural Causes Geographical location close to the sea, humid air, a lot of fog.

2 Human causes In the early stage of industrial development, industrial exhaust emissions led to high air pollution index.

At that time, London was very polluted, but there were too many of them, so it was called the fog capital. Many cities in China today can also be called fog capitals.