Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal. This type of smog is aggravated by dampness and a high concentration of suspended particulate matter in the air.
Why is it called London smog?
London had experienced these types of smog before. They were called “pea-soupers” due to their yellowish-brown appearance. Today, pea-soupers are known as sulphurous smog or “London smog”. These result from a high concentration of sulphur oxides (SOx) in the atmosphere from fossil fuels high in sulphur, such as coal.
What is London smog and LA smog?
The London-smog mostly occurring in the winter months consists of a mixture of gaseous and solid aerosoles as well as of natural fog. The Los Angeles-smog, which is relatively dry, is formed only during sunny sommerdays by photo chemical process.
Why is sulfurous smog called London smog?
Sulfurous smog is also called “London smog,” (first formed in London). Sulfurous smog results from a high concentration of SULFUR OXIDES in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal (Coal was the mains source of power in London during nineteenth century.
How is smog formed in London?
The Great Smog of ’52 was a severe air-pollution event that affected London during December 1952. A period of cold weather, combined with an anticyclone and windless conditions, collected airborne pollutants mostly from the use of coal to form a thick layer of smog over the city.
What is London smog Class 11?
London smog is also known as classical smog. It is mainly caused by the air pollution and air pollution is caused due to combustion of coal and emission of sulfur dioxide and dust also.
What gas causes London smog?
According to the UK’s Met Office, the following pollutants were emitted each day during the smoggy period: 1,000 tonnes of smoke particles, 140 tonnes of hydrochloric acid, 14 tonnes of fluorine compounds and 370 tonnes of sulphur dioxide which may have been converted to 800 tonnes of sulphuric acid.
What is smog short answer 8?
Smog: This is a thick fog-like layer in the atmosphere, especially during winters, made up of fog and smoke. Sulphur dioxide is mainly produced by burning fuels such as coal. It causes respiratory problems, including permanent lung damage.
When was London’s last smog?
The 1962 London smog was a severe smog episode that affected London, England in December 1962. It occurred ten years after the Great Smog of London, in which serious air pollution had killed as many as 12,000 people.
What Color Is LA smog?
yellow-brown
The origin of the yellow-brown coloration of the Los Angeles smog layer was investigated theoretically by solving the radiation transfer equation for an optically thin (in vertical direction) scattering and absorbing haze layer.
Who named smog?
London, England, physician Harold Des Veaux coined the word smog in 1905 to describe natural fog contaminated by smoke: smoke + fog yielded smog.
What is smog Class 9?
Smog is a photochemical haze caused by the action of solar ultra violet radiation on atmosphere polluted with primary pollutants such as hydrocarbons and oxides of nitrogen from automobile exhaust.
How many died in London smog?
Impacts of the smog
About 4,000 people were known to have died as a result of the fog, but it could be many more.
How did the London smog end?
After five days of living in a sulfurous hell, the Great Smog finally lifted on December 9, when a brisk wind from the west swept the toxic cloud away from London and out to the North Sea.
What is smog caused by?
Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
What is smog in chemistry class 11?
Smog is a type of air pollution. It is a blend of smoke and fog. Smog is classified into classical smog and photochemical smog. Classical smog occurs in a cool, humid climate. Its components include smoke, fog and sulphur dioxide.
What is smog in geography class 11?
Smog: Such a condition when fog is mixed with smoke, is described as smog.
What is classical smog Class 11?
Classical smog consists of smoke, fog, and Sulphur dioxide components and is mostly found in humid conditions. They are generally present where there is a high concentration of particulate matter and Sulphur dioxide is produced due to the combustion of fuels.
Why London smog is formed in winter?
Smog episodes during winter (December-February) are mainly caused by limited dilution of air pollution, under unfavourable meteorlogical conditions: little wind (from continental directions) and a temperature inversion.
What is the full form of smog?
Smog, or smoke fog, is a type of intense air pollution. The word “smog” was coined in the early 20th century, and is a portmanteau of the words smoke and fog to refer to smoky fog due to its opacity, and odor.
What are 3 sources of smog?
Types of Sources
mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces.