50% darkening of the earth will lead to the end of Venus? Behind this is the helplessness of survival.

A new study published in Geophysical Research Letters, a magazine of the American Geophysical Union, shows that climate change makes the earth darker and darker, further aggravating global warming. What is the earth going through? Why do you say that extreme weather will gradually become a daily behavior, and the earth really begins to turn into Venus and start an irreversible fever journey? Why hasn't carbon dioxide emission reduction been achieved after decades of discussion? Because there is a dilemma between the possible extinction of emissions and poverty without emissions.

In fact, climate warming is not a new word, after all, it has been mentioned for decades, but according to many people's understanding, if the temperature of the earth is getting higher and higher, then we should see that the earth will get brighter and brighter in outer space, just like the objects with higher temperature in life look brighter and brighter, which makes sense. However, a recent study found that this is not the case. It turns out that in the past 20 years, the brightness of the earth has decreased by 50% from space.

Ordinary people may only think that this news has little impact on us, but many climatologists have a cold sweat, because it is different from their previous estimation. Although the climate is getting warmer, climatologists estimate that with the increase of the earth's temperature, the evaporation of water will also increase, which will lead to the increase of cloud cover over the earth, and the increased cloud cover will increase the reflection of the earth on the sun's light. Then let the earth's temperature drop slowly, which can offset some of the climate warming. It is also accurately predicted that the earth's atmosphere will absorb 7% more water vapor every time it warms up 1 degree Celsius. However, the current situation is that the earth has indeed warmed up, but it has not enhanced the reflection of the earth. On the contrary, it will weaken reflection, strengthen absorption and further increase the temperature of the earth, which is troublesome.

In the cold universe, due to the radiation of the sun, the earth can maintain an average temperature of 15, just like a big white fat man heating himself in winter. If he is too close to the fire, he will be too hot to stand; if he is too far away from the fire, he will be cold. Fortunately, the distance between the earth and the sun is just right now, so that the sun can enjoy the warmth of the earth without becoming a fireball.

Similarly, the earth maintains its ecology through an extremely complex and accurate system. The rise of the earth's temperature comes from the radiation of the sun to the earth, but it is impossible for the earth to absorb all the sunlight that shines on the earth, which can only lead to a sharp rise in temperature. Venus is the end of the earth, because it is too close to the earth and absorbs too much heat. Therefore, in order to maintain a constant temperature, the earth must reflect the light from the sun to the earth back to the cosmic vacuum in proportion, and the albedo is about 0.3-0.35 at present, which is close to the reflectivity of the desert to the sun light.

But it should be understood that this reflectivity is maintained not because of a certain part of the earth, but because of the similarity of all objects on the whole surface of the earth. Obviously, we know that dark objects absorb more sunlight and reflect less, while white objects absorb less sunlight and reflect more, just like if you want to stay in the sun for a day in summer, it will be cooler if you wear white clothes, and you will feel like a fool if you wear black clothes. Therefore, it is easy to infer that most of the sunlight reflected from the earth's surface belongs to the ice sheet and the white clouds floating above us. As can be seen from the reflection map of the earth's surface below, the polar ice sheet region has the strongest reflection.

So now it is obvious that the reason why the earth turns black is because there is less sunlight reflected. Why is the ratio of reflected solar light less? Because the earth absorbs more sunlight, why is there such a change? That is, there are fewer objects on the earth's surface that easily reflect sunlight, while there are more objects that easily absorb sunlight. In other words, there are fewer and fewer light colors and more and more dark colors. The earth is slowly changing from a white and fat "small broken ball" to a black and thin "Louis Koo".

The earth's reflection decreases and becomes darker and darker. There are many reasons, but mainly from three aspects:

1, melting of ice sheet:

This is the change map of the ice-covered areas in the polar regions of the earth:

The melting of polar ice sheets is not a new topic. In fact, not only the polar ice caps are melting, but also the snow in the snow-covered areas all over the world, such as the Qinghai-Tibet Plateau in China. According to research, 90% plateau lakes in China are increasing because of melting glaciers. According to the survey, the glacier area in the Qinghai-Tibet Plateau and its adjacent areas has decreased from 53,000 square kilometers to 45,000 square kilometers in recent 30 years, shrinking by 15%. The Bulugangri Glacier in China, known as the roof of the world, is also melting, which makes Selincuo in the south expand from 1.667 square kilometers in the 1980s to 2,394 square kilometers at present, an increase of about 43%.

2. The decrease of cloud cover caused by rising temperature;

After warming, the temperature rises, the saturated water vapor pressure also increases, the water vapor is less and less easy to condense, and the cloud amount is less and less, so the warming of the ocean causes the clouds above to reduce the cloud amount and weaken. The reflection on the sun makes the ocean absorb more heat from the sun, so the temperature of the ocean rises further, and then the clouds decrease, forming a perfect positive cycle.

3. All kinds of waste gases emitted weaken the reflection of the earth:

When you see the smoke from the chimney, you will find that most of the smoke from the chimney is dark or black. Even those seemingly white smog actually contain a lot of dust. These things themselves will absorb sunlight very strongly. After they are distributed in the atmosphere, the atmosphere will be filled with more and more dust gases, which will also lead to stronger absorption of sunlight and weaker reflection, which will further lead to the increase of the earth's temperature.

To sum up, whatever the reason, you will find that this will form a positive cycle of mutual achievement. The melting of the ice sheet will expose the soil, which will strengthen the absorption of sunlight, increase the temperature, further accelerate the melting of the ice sheet, increase the temperature caused by greenhouse gas emissions, further increase the temperature of the earth and further increase the cloud cover. There is no doubt that the earth is slowly starting to have a fever under a multi-pronged approach.

1, extreme weather is no longer extreme:

The meaning of this sentence does not mean that extreme weather has gradually disappeared, but that extreme weather will become a common thing in life and become accustomed to it. In fact, we can also see from the news that more and more extreme weather has appeared in recent 10 years. A large number of droughts, floods, rainstorms and typhoons are constantly appearing in various parts of the earth. Even in the same country, floods and droughts will occur in many places at the same time, because with the increase of the earth's temperature. After the melting of polar glaciers, the temperature difference between the poles and the equator is getting closer and closer, which is one of the important reasons for the formation of atmospheric circulation. Once the atmospheric circulation weakens, the movement of water vapor will also weaken, resulting in more and more water in places with more water vapor, resulting in heavy rains and floods. Where there is less water vapor, there will be less and less water vapor, and the drought will become more and more serious, just like all areas that have lost traffic.

2. Final destination: Venus

From the above analysis, we can see that global warming has become a vicious circle, constantly pushing up the average temperature of the earth. If human beings don't take action, the temperature of the earth will rise faster and faster. No one knows whether the future earth will slowly embark on a cautious road, but it can be known that before that, human beings must have disappeared from the earth.

Many students think that if we want to protect human beings and the earth, we can reduce carbon emissions, but it's not that simple. For the whole mankind, carbon emission is always a game problem, because in some ways, carbon emission means a modern industry with low prices and high profits.

European and American countries started the industrial revolution very early, using coal, oil and natural gas as fuel. At that time, the whole European region and the United States were completely shrouded in smog. The smog is much more serious than it is now. I believe many students should know the famous smog incident in Los Angeles. Who will tell them about carbon emissions at that time? Don't they know that releasing so much waste gas into the atmosphere will cause the temperature of the earth to rise? Of course I know, but why should we discharge? Because to develop production, to produce more industrial products, to make the society richer and stronger, and to make the country stronger, it is necessary to open so many factories, and if we spend a lot of money to control emissions. The development speed of the whole country will slow down, so at that time, the west chose desperate development, eat enough first, and let the country become strong before talking about the latter.

Hundreds of years have passed, because of the early industrial revolution, many western countries have now become very rich, and began to occupy the top industries with high profits, low costs and high requirements for talents in industrial society, so they moved the low-end factories that produced a lot of waste gas to other developing countries or more backward countries, and naturally there were fewer polluting factories, so the banner of protecting the earth was played out at this time. We want to protect the earth, we want to.

Do other countries need to develop? If these backward countries want to develop strongly, they must maintain the development of industrial society through a large number of factories, but at the same time, they will produce a lot of waste gas such as carbon dioxide, which will aggravate climate warming. Is it because of possible climate warming that these countries will automatically bind their hands and feet, stop emitting carbon dioxide from these waste gases, stop developing, or start to slow down their own development? Few countries are willing to do so.

Now China has put forward a carbon neutral strategy, but this strategy has not been implemented immediately. It is impossible to close most factories that emit exhaust gas next year, and it will take time for all fuel vehicles to withdraw from the market next year. Not only China, but also any country that wants to reduce carbon emissions will take decades to complete this transformation. Therefore, it can be predicted that in the development of mankind in the next few decades, carbon emissions will not really decrease a lot, or will not disappear. The greenhouse effect will continue and the global climate will become more extreme. This is the whole world. Not all the interests facing every country can be solved through an agreement. Is there anything wrong with development? Is it wrong to want to eat enough? What's wrong with living a good life? That's right! Exhaust gas, right? Not right either! But what should we do?

"At first, no one cared about the disaster. It was just a mountain fire, a drought, the extinction of a species, the disappearance of a city, until this disaster is closely related to everyone. "