What are the causes of climate change caused by human factors?

Since human activities, human beings have begun to influence the climate. With the development of human society and economy, the scale and depth of human influence on climate are also developing.

In the early days of human history, human beings were completely slaves to climate, and their activities were completely limited by climatic conditions, so they could only live in warm and humid tropical forests. About before entering the Stone Age, human beings were still in a state of self-reliance. After entering the Stone Age, human beings mastered fire and began to enhance their ability to adapt to the climate. This painful process has gone through at least 654.38 billion years.

Later, human beings began to transform the surrounding climate to a limited extent, and clothes and houses were a sign. Later, people began to change the local climate in agriculture and other production activities. Since the industrial revolution, science and technology have developed rapidly, and people can not only take measures under various natural climatic conditions to obtain the climate that human beings adapt to; But also can change the climate in larger and larger local areas. Artificial weather control is also developing. With the improvement of people's understanding level and the growth of technical ability, it has become an important feature of modern science for human beings to actively plan the environment, transform the climate and guide the climate and environment to develop in a direction beneficial to human beings.

Judging from historical facts, human beings actively transform the climate purposefully, and some blindly and passively make the climate worse.

Using clothes and houses to transform the climate is a technical behavior for human beings to establish their own living and living environment in order to adapt to the climatic conditions. * * * is characterized by the establishment of an artificial microclimate environment suitable for human survival and life under the macro-climatic background, so as to achieve the purpose of heat preservation, cold prevention and wind prevention. The difference is that clothing is a climate shell that wraps the human body and can move with the human body; The thickness and layers of clothes can be increased or decreased with the change of weather and climate; Can use different clothing materials with different economic levels, so as to control and adjust the microclimate. Houses cannot be moved: the thickness and level cannot be increased or decreased at will; Can't change building materials at will. The house is fixed and can only be adjusted locally by doors and windows. The choice of materials, the design of architectural structure and the arrangement of plane layout are all the best choices to adapt to the climate environment.

Changing the shape of the earth's surface, such as planting trees, irrigating farmland, drying swamps and building reservoirs, can also change the local climate environment. Afforestation can prevent wind and fix sand, keep soil moisture and change air humidity and temperature. Although the direct purpose of reservoir construction and irrigation is not to change the climate, they can reduce the annual and daily temperature difference, increase the minimum and average temperature, and increase humidity and precipitation.

On the negative side, while gaining its own interests, human beings blindly reclaim land, slash and burn, destroy forests, cause soil erosion and worsen the climate. Because the forest is an important protective layer on the earth's surface, it plays a great role in the preservation and exchange of water and heat on the ground. It is estimated that the water storage capacity of 5 million mu of forest is equivalent to a reservoir of 654.38+0 billion cubic meters. Farmland shelterbelts in arid areas can increase air relative humidity 10% ~ 15% and soil water content by 22 ~ 27 mm. This is the climatic significance of people calling for the protection of forests.

The blindness of human activities is also manifested in the increase of industrial pollutants. The result of industrial development is to discharge a lot of waste, waste water, waste gas and waste heat, which seriously pollutes soil, water body and atmosphere. It has greatly changed the atmospheric composition, atmospheric turbidity and thermal properties, resulting in changes in climate factors such as temperature and precipitation.

The influence of human activities on atmospheric composition is mainly the emission of industrial greenhouse gases, which is manifested by the increase of carbon dioxide, methane, nitrous oxide, freon gas, sulfur hexafluoride and sulfide aerosols in the atmosphere. On the other hand, it also includes the increase of population and the influence of urbanization. They may cause drastic climate change, which has aroused widespread concern. The increase of greenhouse gases in the atmosphere will lead to global warming, which will melt the polar ice sheet and raise the sea level. Extreme weather disasters such as drought, rainstorm and flood emerge one after another; Sulfur dioxide and nitrogen oxides can form acid rain; Chlorofluorocarbon gas will destroy the atmospheric ozone layer, resulting in the destruction of Antarctic ozone hole and global ozone layer; At the same time, chlorofluorocarbons are also important greenhouse gases, thus changing the global natural geographical environment.

Human activities will affect the environment, and sometimes human activities will have a direct and unquestionable impact on the climate. For example, irrigation will change the local humidity, and sometimes the effect is not so obvious. Modern scientific research tends to think that in recent decades, human activities have led to a rapid rise in global temperature. Therefore, human beings should try their best to reduce the activities that affect the climate and try their best to eliminate the evil consequences that have been caused.

Among them, human beings have the greatest impact on the climate, because burning fossil fuels and making cement will emit a lot of CO2 and floating dust. In addition, there are land use, ozone layer destruction, animal husbandry and agricultural activities, deforestation and so on. , will have different effects on the climate and become a factor of climate change.

When there are many warm periods in the history of the earth's climate, the content of greenhouse gases is also high. Without human intervention, nature has its own laws, and life on earth can't escape if it wants to. However, the problem facing modern human beings is whether the excessive emission of man-made greenhouse gases has destroyed or will soon destroy the rhythm of nature, leaving a ruined future for future generations.

If the greenhouse gas content in the atmosphere continues to rise (which is an inevitable fact), scientists estimate that by 2 100, the global average temperature will be 0.9~3.5℃ higher than that of 1990. The greenhouse effect of carbon dioxide accounts for about 70%, and other greenhouse gases account for about 30%. Because of the large heat capacity of the ocean, it is not easy to raise the temperature, and the temperature on land will rise much higher than that on the ocean, especially in the high latitudes of the northern hemisphere, because there are more land in the northern hemisphere. However, the temperature in the North Atlantic is not rising, but falling. It is estimated that the increase of carbon dioxide concentration will increase the global average precipitation, especially in high latitudes in winter. At low latitudes, precipitation generally increases in areas with relatively large precipitation, especially in South Asia and Southeast Asia. With the increase of the global average temperature, the seawater temperature will also increase. The volume expansion and the melting of polar ice and snow will gradually increase the global average sea level, which will be 38~56 cm higher than that of 2 100/990. The sea level rise is mainly caused by the expansion of seawater volume, and the melting of glaciers in Greenland and Antarctica has little effect. Sea level rise will bring serious disasters to mankind. China's coastal areas are all affected, and the main affected areas may be the North China Plain, the Yangtze River Delta and the Pearl River Delta. What should we do after global warming in 2 1 century? It has attracted the attention of governments and people all over the world.