What are the possible causes of global climate change?

There are two reasons for global climate change:

First, human factors:

1. Population explosion factor: With such a huge population, the amount of carbon dioxide emitted by itself will be an amazing number every year, which will directly lead to the continuous increase of carbon dioxide content in the atmosphere, and the "greenhouse effect" of carbon dioxide formed in this way will directly affect the climate change on the earth's surface;

2. Atmospheric environmental pollution factors: global climate change research has clearly pointed out that the earth's surface temperature has been rising since the end of last century;

3. Deteriorating factors of marine ecological environment: sea level changes are on the rise. According to the prediction of relevant experts, by the middle of the next century, the sea level may rise by 50 cm;

4. Factors of sharp decline of forest resources: Worldwide, due to natural or man-made factors, the forest area has decreased sharply.

Second, natural factors:

1. Volcanic activity;

2. Periodic orbital change of the earth: According to the research of scientists, the temperature of the earth changes alternately between high temperature and low temperature, which has certain regularity;

3. The iceberg melts;

4. Solar activity: Some experts believe that climate warming is related to the solar cycle, and the change of solar activity has also played a role in promoting it.

What are the possible causes of global climate change?

The "physiological period" of the earth is different, but it also has periodic changes, just like the cycle of human birth, aging, illness and death.

The temperature change of the earth is closely related to external factors and human factors. Under the mutual influence of these two factors, the ambient temperature is getting higher and higher.

Among them, the human factor is the booster, which enhances the environmental changes during the thermal cycle.

Scientists believe that climate warming is a natural phenomenon. 2.5 million years ago, there were temperature changes of different scales on the earth. Now we are in the thermal cycle of 1500- 1800 years.

Secondly, the longer the alternating interval between cold and hot cycles, the greater the temperature difference changes.

According to the data, the temperature changed by 654.38+ 00℃ during the frozen period of 654.38+10,000 years, while it only changed by 5℃ during the period of 20,000 years.

Judging from Liangzhu cultural sites, "modern people" have a history of more than 5,000 years, and the temperature change cycle is also applicable to the current environmental changes.

Excluding human factors, the environmental temperature should be 2-3℃ every thousand years, which means that the temperature environment we are in now is a natural change cycle. After the overheating cycle, it will usher in cooling.

There is also a common saying that the greenhouse effect caused by human factors is the destruction of the ozone layer by human social production activities, which leads to global warming.

The composition of the atmosphere is nitrogen, carbon dioxide, ozone and helium. Nitrogen and oxygen account for 78. 1% and 20.9% respectively, while carbon dioxide and rare gas only account for 1%.

Nitrogen and oxygen are nonpolar molecules, which automatically filter the solar radiation band, but the problem lies in carbon dioxide, which absorbs the long-wave radiation of the sun and releases short-wave radiation. After the concentration of carbon dioxide increases, it absorbs more long-wave radiation, causing global warming.

This statement has been supported by many people. In the past century, the industrial revolution has opened the curtain of the times, and coal, oil and other energy sources have been widely used in all aspects of human life.

With more and more cars and denser industrial factories, thousands of tons of carbon dioxide are discharged into the air. The carbon dioxide accumulated in the atmosphere is like a "one-way door" that can only enter, accumulating more and more heat, and there is nowhere to vent, thus triggering the greenhouse effect.

Vicious circle Global warming is a vicious circle. As the temperature rises, the most obvious changes are the melting of Antarctic ice and the thawing of Arctic frozen soil.

Both of them will let the tar burn on the fire in the high temperature environment.

First of all, the Antarctic ice sheet is a huge mirror, which reflects solar particles from the universe and protects them from direct attacks.

If the ice melts, the Antarctic will lose its largest capital, forming a vicious trend, and it will not threaten the Antarctic at this time.

If the melting degree of Antarctic ice surface deepens and breaks through the critical value of glacier area, a vicious circle will be formed, and a large number of solar particles will stay in the Antarctic and accelerate the melting of glaciers.

The second reason is the outbreak of methane in the Arctic, which is more harmful to global warming than carbon dioxide, and its power is directly increased by 20 times.

Arctic permafrost contains the most combustible ice (methane hydrate) in the world, and 1 m3 of combustible ice is enough to decompose into 164 m3 of methane.

So methane explosion is the best fertilizer in greenhouse. The higher the temperature, the faster the frozen soil thaws and the more methane gas is released, which in turn promotes the temperature rise and forms a vicious circle.

Whatever the reason, global warming is the general trend. What we can do is to reduce carbon dioxide emissions, plant more trees and protect ecological stability, thus alleviating the temperature rise.

The causes of global warming are the rapid increase of population, air pollution, the deterioration of marine ecology, the sharp decline of forest resources, the destruction of the atmosphere, serious pollution and greenhouse effect, which have caused global warming.

Scientists believe that the global warming trend observed since the mid-20th century is the "greenhouse effect" of human expansion-when the atmosphere absorbs the heat radiated from the earth into space, it will lead to warming.

Some gases in the atmosphere prevent heat loss. Long-lived gases remain semi-permanent in the atmosphere and have no physical or chemical reaction to temperature changes, which is called "forced" climate change. A gas, such as water vapor, that has a physical or chemical reaction to temperature changes.

Gases causing the greenhouse effect include:

steam

The most abundant greenhouse gas, but most importantly, it is a feedback to the climate. With the warming of the earth's atmosphere, water vapor will increase, but the possibility of clouds and precipitation will also increase, which makes these become the most important feedback mechanism of the greenhouse effect.

carbon dioxide

Carbon dioxide is a trace but very important component in the atmosphere, which is released through natural processes (such as breathing and volcanic eruption) and human activities (such as deforestation, land use change and burning fossil fuels). Humans have increased carbon monoxide 2 in the atmosphere, and since the beginning of the industrial revolution, its concentration has exceeded one third. This is the most important long-term "driver" of climate change.

methane

A hydrocarbon gas produced by natural sources and human activities, including waste decomposition in landfills, agriculture (especially rice planting), ruminant digestion and livestock manure management. On the molecular basis, methane is a much more active greenhouse gas than carbon dioxide, but it is also a gas with much less content in the atmosphere.

Nitrous oxide

Soil farming, especially the use of commercial and organic fertilizers, the burning of fossil fuels, the production of nitric acid and the burning of biomass, is a powerful greenhouse gas.

Chlorofluorocarbon

Synthetic compounds completely from industry are used for many purposes, but their production and release into the atmosphere are now mainly controlled by international agreements because they can destroy the ozone layer. They are also greenhouse gases.

The greenhouse effect is not enough: the atmosphere of Mars is very thin and almost full of carbon dioxide. Due to the low atmospheric pressure, there is almost no methane or water vapor to enhance the weak greenhouse effect. Most of the surface of Mars is frozen and there is no sign of life.

Insufficient greenhouse effect: the atmosphere of Mars is very thin and almost full of carbon dioxide. Due to the low atmospheric pressure, there is almost no methane or water vapor to enhance the weak greenhouse effect. Most of the surface of Mars is frozen and there is no sign of life.

Too much greenhouse effect: Venus's atmosphere is almost carbon dioxide, just like Mars. However, the carbon dioxide content in the atmosphere of Venus is 154000 times that of the earth (19000 times that of Mars), which leads to uncontrolled greenhouse effect and surface temperature enough to melt lead.

Excessive greenhouse effect: Like Mars, Venus' atmosphere is almost entirely carbon dioxide. However, the carbon dioxide content in the atmosphere of Venus is 154000 times that of the earth (19000 times that of Mars), which leads to uncontrolled greenhouse effect and surface temperature enough to melt lead.

On the earth, human activities are changing the natural greenhouse. In the last century, burning fossil fuels such as coal and oil increased the concentration of carbon dioxide in the atmosphere. This is because the combustion process of coal or oil combines carbon and oxygen in the air to produce carbon monoxide. To a lesser extent, reclaiming land for agriculture, industry and other human activities has increased the concentration of greenhouse gases.

It is difficult to predict the consequences of changing the natural atmospheric greenhouse, but some effects seem possible:

On average, the earth will get warmer. Some areas may have higher temperatures, but others may not.

Generally speaking, warmer climate conditions may lead to more evaporation and precipitation, but individual areas will be different, some areas will become wetter and some areas will become drier.

A stronger greenhouse effect will warm the ocean, partially melt glaciers and other ice, and thus raise the sea level. If the sea gets warmer, it will also expand, further causing the sea level to rise.

At the same time, some crops and other plants may respond well to the increase of carbon monoxide in the atmosphere, grow more vigorously and use water more effectively. At the same time, higher temperatures and changing climate patterns may change the best areas for crop growth and affect the composition of natural plant communities.

The role of human activities

In the past 50 years, human activities have more than 95% possibility of warming the earth.

In the past 150 years, the industrial activities on which our modern civilization depends have increased the carbon dioxide content in the atmosphere from 280 ppm to 4 12 ppm. The team also concluded that in the past 50 years, greenhouse gases produced by humans, such as carbon dioxide, methane and nitrous oxide, have a probability of more than 95% causing the earth's temperature to rise sharply.

solar radiation

Since 1950s, the solar energy received by the earth has been following the small fluctuation of the natural period of the sun of 1 1, with no net increase. During the same period, the global temperature increased significantly. Therefore, it is extremely unlikely that the sun will cause the global warming trend observed in the past half century.

It is reasonable to assume that the change of solar energy output will lead to climate change, because the sun is the basic energy that drives our climate system.

In fact, research shows that solar change played a role in past climate change. For example, the decrease of solar activity and the increase of volcanic activity are thought to help trigger the Little Ice Age between 1650 and 1850, when Greenland cooled from 14 10 to 1720, and glaciers in the Alps advanced.

But some evidence shows that the current global warming cannot be explained by energy changes from the sun:

Since 1750, the average energy from the sun has either remained the same or increased slightly.

If the warming is caused by a more active sun, scientists will see that all layers of the atmosphere are getting warmer. Instead, they observed that the upper atmosphere cooled, while the surface and lower atmosphere warmed. This is because greenhouse gases absorb heat in the lower atmosphere.

If the increase of greenhouse gases is not considered, the climate model including the change of solar irradiance cannot reproduce the temperature trend observed in the past century or more.

Hello: I'm Ma San from the countryside. I'm happy to answer your question. ...

I know that there are two main factors that affect global climate change.

First, the progress of our human science and technology. ...

Second, human destruction of nature. ...

The answer is in the video below.

thank you

The main factor of global climate change is the movement of galaxies!

The periodic rise and fall of the earth's temperature is the law of the operation of the universe. The cycle ranges from hundreds to millions of years. For example, during the Ice Age hundreds of thousands of years ago, there were glaciers in Beijing. But more than 2000 years ago, Henan was subtropical, and elephants lived there.

So now the relationship between the earth's temperature change and human activities needs scientific demonstration. In my opinion, the whole thing is irrelevant.

Of course, this is not to support the profligate lifestyle of western capitalism and the vicious struggle for material benefits.

Persuading and persuading people to change their excessive pursuit of material desires lies in convincing people with reason, that is to say, to know what people are, why people are alive, and why it is wrong for people to pursue material desires excessively. Instead of simple or even unfounded threats, this is basically useless!

The total weight of people only accounts for tens of millions of the earth, and the carbon dioxide emitted is only a very small proportion in the atmosphere. There are many factors that determine the temperature of the earth, even the factors of the earth itself are secondary, such as the core heat. More important factors are the position of the sun, solar system and galaxy. Those scientific circles in the west have not considered these basic factors, that is, carbon dioxide emissions, which is typical, only the trees can't see the forest!

From the time scale, the 300 years of human industrialization is also a small fluctuation time in the earth's climate cycle. Judging from the geological movement of tens of millions of years, it is a small fluctuation. Judging from the history of the earth, the sun and the universe for billions of years, it is simply an instant, not even a butterfly flapping its wings. Like a grain of sand thrown into the sea, it suddenly triggered a tsunami [yi tooth] [yi tooth] [yi tooth]

At present, most environmentalists in the west, especially politicians and star capitalists, are superficial and lack scientific basis. Blind people touch elephants or grandstanding. The logic behind it is that people who wear shoes dare not mess around in the mud barefoot and dare not splash their shoes. There is also that everyone wants to wear leather shoes, and in the end, there may be insufficient resources and a sense of superiority.

According to the data of the United Nations Intergovernmental Panel on Climate Change, the temperature of the earth has been rising for more than a decade.

Global warming may be caused by the greenhouse effect.

First, introduce a knowledge point. The surface temperature of the earth is related to three aspects. One is the energy directly transmitted by the sun to the surface, the other is the energy reflected by the surface, and the third is the energy absorbed by the atmosphere and reflected back to the surface.

So what are the possible reasons for the greenhouse effect? ?

Share it with everyone ~

First, the increase of carbon dioxide concentration As we all know, carbon dioxide is a greenhouse gas. Humans constantly dig up buried fossil energy, then burn it, convert it into carbon dioxide and enter the atmosphere. According to the natural process, it takes tens of millions or even hundreds of millions of years for all the fossils in the lithosphere to turn into carbon dioxide and enter the atmosphere. But humans have done it for hundreds of years. Most scientists believe that this is an important cause of global warming.

Second, changes in the earth's surface include human deforestation and destruction of the surface. Forests are places where carbon dioxide is absorbed and oxygen is released. The reduction of forests has prevented the reduction of carbon dioxide in the atmosphere.

Third, the increase of water vapor With global warming, more water vapor will naturally become water vapor, thus aggravating the greenhouse effect. Carbon dioxide will absorb the heat of the sun, and water vapor will trap the heat on the earth like a pot cover and cannot reflect it.

Fourth, the melting permafrost contains a lot of methane and carbon dioxide. Global warming will melt frozen soil and naturally release methane and other greenhouse substances.

Verb (abbreviation of verb) Industrialized emission of greenhouse gases The first point is that the burning of fossil fuels will lead to a large amount of carbon dioxide emissions. In fact, in addition to carbon dioxide, human industrial production and the use of vehicles also lead to the release of sulfur oxides, nitrogen oxides, hydrocarbons and so on. These will also aggravate the greenhouse effect.

Sixth, the urban heat island effect I don't know if you have this feeling, it will feel cooler in the countryside than in the city. In fact, this makes sense, because there is a heat island effect in big cities. Big cities are densely populated, with heavy traffic, developed industries and serious air pollution. Urban buildings usually have low heat capacity and fast heat conduction. In addition, buildings will block the wind from blowing into the city and aggravate the thermal effect of the city. The heat in the city will make the air pressure outside the city low and high, which will cause the surrounding atmosphere to gather in the city center, so all kinds of air pollutants will also gather in the city center, which will endanger people's health!

The greenhouse effect of human activities leads to climate warming, and there are also natural factors to expand the data:

Contemporary global warming is an indisputable fact. Temperature rise is not only a man-made factor, but also a natural factor. However, regarding the causes of contemporary climate warming and its possible consequences, last year's severe summer drought in Chongqing and various extreme weather events in China were mainly caused by the abnormal superposition of tidal force.

Automobile exhaust emissions are huge, the forest vegetation coverage rate is reduced, and the industrial revolution is moving forward.

How much oil, gas and coal have been burned and how much energy has been released?