Reasons for less smog in Chengdu in spring and summer

Question 1: How did the smog come about? Why is there no smog in spring and summer? There are too many small particles in the air to see clearly. It may be necessary to heat and burn coal in autumn and winter in the north. As soon as coal burns, the air will be polluted. . .

Question 2: Why does smog weather increase in winter, but not in summer, spring and autumn? Is it really like what Chai Jing said? None in spring, summer and autumn, but relatively few.

The formation of smog is a very complicated process, which is related to many aspects.

The first is the climatic conditions. Generally, smog mostly occurs in autumn and winter. Due to the domestic climatic conditions, there are few air currents in autumn and winter, mostly pure and stable air currents, and less rain, which is suitable for pollutant accumulation.

Then there are pollutants. There are many air pollution sources that cause smog, such as automobile exhaust, industrial waste gas, coal-fired power, petroleum products and so on.

Thirdly, the pollutants in front of us, such as the pollution caused by heating coal in winter in the north, are also great sources of pollution.

There is also the destruction of vegetation environment, which makes nature's ability to degrade smog decline rapidly and smog increases!

Climate is a very important reason!

Question 3: Why is there so much smog in Beijing in winter? First of all, the actual situation is that there is smog in Beijing in spring, summer, autumn and winter, but it is more obvious in winter.

Secondly, the smog in Beijing is not the most serious, but the most serious is from Shijiazhuang to Xingtai in North China. The reason is very simple, caused by the terrain.

The border of North China Plain is at the southern foot of Taihang Mountain, and Beijing and Xingtai in Shijiazhuang are just to the east of the foothills, among which Shijiazhuang is the lowest point in North China Plain, and smog is easy to gather.

It is generally believed that the sources of smog are industrial emission pollution, urban construction and decoration, road dust, domestic heating and smoke exhaust and automobile exhaust. Haze contains volatile acid fog such as fine dust, nitric acid and sulfuric acid fog, organic hydrocarbons and heavy metals. And this is the main component of air pollutants, dust and automobile exhaust in heavy industry. In particular, coal-fired power generation, metallurgy, chemical industry, wood processing and building materials industries with concentrated dust are one of the main sources of atmospheric particles and sulfides. Most of the automobile exhaust is nitrogen oxides and carbon oxides, especially the particulate matter content in diesel automobile exhaust is larger. Industrial emissions and automobile exhaust constitute the most important hazards in smog pollution. With the saturation of industrialization development in major developed industrialized countries, the pollution industry gradually withdrew from the local area, the awareness of environmental protection was enhanced, the process of atmospheric environmental control was accelerated, and such serious pollution incidents gradually decreased and disappeared. At present, China is in a critical period of industrialization, and the development of basic industries, processing industries and fine industries is booming simultaneously. Especially since the reform and opening up more than 30 years ago, the process of urbanization has been accelerated, automobiles have been popularized, China has entered the ranks of quasi-developed countries, and people's demand for industrial products and services and energy consumption have been increasing. A large number of needed basic industries, untreated small factories and backward overcapacity coexist, which has caused great pressure on the atmospheric environment. Because China's industrialization started late in the world's major industrialized countries, but it has developed rapidly, China's industrial capacity has doubled several times in just a few years, and the subsequent industrial pollution and the rapid popularization of automobiles have brought about exhaust pollution faster and even greater than the problems experienced by industrialized countries.

Question 4: What are the top ten smog-free cities in China and the top ten smog-free cities in China? With the frequent occurrence of smog weather in major cities in the north, people's desire for blue sky, white clouds and fresh air is getting stronger and stronger. Escape from the smog-shrouded city seems to be the deepest desire of people. So which city in China has no smog? What are the cities without smog in China? Today, I want to introduce you to the top ten smog-free cities in China. Take off your mask and take a spiritual journey.

Sanya, the top ten smog-free cities in China.

Top Ten Smog-free Cities in China

Sanya, located at the southernmost tip of Hainan Island, is the southernmost tropical coastal tourist city in China, with the best air quality and the longest life expectancy (average life expectancy is 80 years). Sanya, also known as "Oriental Hawaii", is the first of the four first-line tourist cities in China and has the most beautiful seaside scenery in Hainan Island.

Sunbathing, eating seafood, keeping company with coconut trees, relaxing under the blue sky and blue sea, come here to find your dream holiday paradise. A number of tourist attractions have sprung up in Sanya, which have set and broken many world records in world record association and won many of the best in the world. Sanya won the title of "20 12 charming city in China".

Dali, the top ten smog-free cities in China.

Top Ten Smog-free Cities in China

The romantic scenery of Cangshan Erhai Lake, butterfly spring and Dali is far away in silence, so beautiful but refreshing.

Dali scenery is a "romantic" picture, and the human landscape records the vicissitudes of a nation. You can go boating in Erhai Lake and feel the vastness of the world. Visit the holy land Jizu Mountain, listen to Sanskrit whispers and watch the Buddha's light shine; Looking for the history of solidification in Shi Baoshan Grottoes; Melt into the romance in the ancient city with a soft heart, feel the elegance of Dali in the sunset, and pursue the modern glitz in the beautiful night. Dali has a long history and many cultural relics, which are widely distributed in and around the ancient city of Dali. The scenic spots are centered on the ancient city and distributed linearly along the foot of Cangshan Mountain and the shore of Erhai Lake. Jin Yong's Tianlong Babu has been put on the TV screen many times, and Dali's Tianlong Babu film and television.

Kunming, the top ten smog-free cities in China

Top Ten Smog-free Cities in China

This is a city that doesn't seem to have a strong theme, and it blooms lazily in this fragrant land in the southwest. It seems that only sunshine and spring are eternal here.

Kunming belongs to the subtropical-plateau mountain monsoon climate with low latitude north latitude. Affected by the warm and humid airflow in the southwest of the Indian Ocean, the sunshine is long and the frost period is short. The annual average temperature is 65438 05℃, the annual sunshine is about 2200 hours, and the frost-free period is more than 240 days. The climate is mild, there is no heat in summer, no cold in winter, four seasons like spring and pleasant climate. With its beautiful natural scenery, splendid historical sites and gorgeous ethnic customs, Kunming has become one of the top ten tourist hotspots in China and the first batch of excellent tourist cities in China.

Lijiang, the top ten smog-free cities in China.

Top Ten Smog-free Cities in China

Lijiang is located in the northwest of Yunnan Province, 527 kilometers away from Kunming. Known as the "living fossil of Chinese classical music", Naxi ancient music, the only "living" Dongba hieroglyphics in the world, Mosuo people who still have matriarchal clan characteristics, Yulong Snow Mountain and Tiger Leaping Gorge have made Lijiang a tourist hotspot in China and even the world.

Lijiang belongs to the southwest monsoon climate of the plateau, with low temperature and large temperature difference between day and night. The best seasons for Lijiang tourism are spring and summer. Personal belongings: short-sleeved T-shirt, sweater, coat, sunscreen, rain gear. Lugu Lake is located among the mountains, and there is a lake to adjust the temperature. The climate is warm in winter and cool in summer, and the monthly average temperature is less than 20℃. However, the best seasons for traveling to Lugu Lake are spring and summer. You'd better check the weather forecast in Lijiang before you come.

Guilin is one of the top ten smog-free cities in China.

Top Ten Smog-free Cities in China

Guilin, referred to as Gui for short, is the third largest city in Guangxi Zhuang Autonomous Region, a world-famous scenic city, a famous historical and cultural city, and the most important tourist city in Guangxi, enjoying the reputation of "Guilin's landscape is the best in the world". As a world-famous tourist city, the scenery in the world outlines a beautiful picture of China, floating on the Lijiang River on a bamboo raft, just like being in a hundred-mile gallery, full of poetry and painting.

Guilin has always had the reputation of "the landscape is the best in the world". It is a key scenic garden city in China and the first batch of historical and cultural cities named in the State Council. In 2003, the World Tourism Organization ranked Guilin as the best tourist city in China along with Beijing, Shanghai and Xi, and solemnly recommended it to the world tourists.

In Coral Lake, a natural and cultural scenic spot open in downtown Guilin, visitors can go directly to the Copper Tower through an underwater tunnel, which is ...

Question 5: Why is Chongqing called the foggy city? Is it fog or haze? The fog in Chongqing is really fog, not haze. Haze has appeared in recent years, and the fog in Chongqing has always been there! Green climate is mild, belongs to subtropical monsoon humid climate, and is a livable city. The annual average climate is about 18℃, the average minimum temperature in winter is 6-8℃, the summer is hot, and the daily maximum temperature in July and August is above 35℃. The maximum extreme temperature is 43℃ and the minimum is -2℃. The total sunshine hours are 1 0,000-10,200 hours. It is warm in winter and hot in summer, with a long frost-free period and abundant rainfall. Annual rainfall 1 0,000-1450 mm, especially at the turn of spring and summer. So there is a saying that it rains late. Chongqing is foggy and is known as the "foggy city of Chongqing". Chongqing is foggy because of its geographical environment. The average annual foggy days in Chongqing are 104 days, while London, which is known as the foggy capital of the world, has only 94 days, and Tokyo, Japan, which is the foggy capital of the Far East, has only 55 days. Chongqing is a veritable "foggy city". Wu Yun, Bishan County, Chongqing has 204 foggy days all the year round, which is called "the best in the world". The reason of fog formation in Chongqing is 1. There are many landforms in the valley of Chongqing, and the water vapor is not easy to disperse, especially in March-May and August-10. Chongqing used to use a lot of coal for industry and life, and many small particles were suspended in the air. 3。 The reason is 1+2. Before Chongqing was formed, there was a lot of fog. In the past two years, there has been less coal, and the name of the foggy city has gradually faded. 4。 Other cities in China lack sufficient conditions for fog formation. When they came to Chongqing, they exclaimed that Chongqing was a foggy city, so it became famous.

Question 6: What season is the worst smog? Take 20 13 as an example, regardless of spring, summer, autumn and winter,

As long as it doesn't blow 4-5 winds, it will be smog for more than 2 days. It's spring now, and it's foggy if it's not windy.

Wind is dust. I am speechless. There are as many cars as before, and barbecues are still everywhere. . . . . . . . . . . .

It is said that the governance cycle is 20 years, so it is estimated that the results will not be seen.

Question 7: When did the smog appear in Beijing? All the year round, regardless of spring, summer, autumn and winter, but the rainy season is better.

The topographical features of Beijing are closely related to the wind direction.

Look at the air quality in Beijing in September this year.

Question 8: When did the haze weather appear in 1#? Smog is generally in high humidity, autumn and winter, 2#, and smog is generally at the turn of spring and summer (sandstorm, sandstorm, floating dust weather PM2.5 storm,)