Why volcanic ash from volcanic eruptions can mitigate the greenhouse effect

It is mainly volcanic ash that forms "aerosols", which have a "greenhouse effect" effect on sunlight.

Large volcanic eruptions on the earth will eject a large amount of volcanic ash and rise to the air, forming an "aerosol" layer that reflects solar radiation, reduces the solar radiation reaching the earth's surface, and lowers the temperature, a phenomenon known as the "parasol effect". This indicates that volcanic activity is frequent and the temperature is prone to dropping; Volcanic activity is low, and temperatures tend to rise. According to statistics, there are half as few strong volcanic eruptions in the warm cycle as there are in the cold cycle.

Since the 80s, there has been a significant decrease in the number of large volcanic eruptions around the world, which may also be one of the reasons for climate warming.

Volcanic ash is so fine that it drifts with the wind to distant places or rises to high altitudes, spreading for a long time, causing reduced visibility, leading to air crashes, traffic accidents, and even "cold summers" in climate variability. In 1783, the eruption of Mount Asama volcano in Japan caused a "cold summer" in Japan, and even frost damage in the northeast. Volcanic eruptions:

Carbon dioxide, sulfur dioxide, hydrogen, chlorine, hydrogen sulfide, etc. can also pollute the air, form acid rain, and produce a greenhouse effect.

Reduce direct sunlight and lower ground temperatures.

Disadvantages: Volcanic ash first causes the suspension of air operations and affects traffic, and then affects the operation of part of the economy; Large amounts of volcanic ash can also lead to changes in the climate and environment, which in turn will affect people's lives, and so on. Pros:

The first is that it can create some land resources for human beings, and this land resource, as I just said, is like Hawaii Island, which is full of volcanic eruptions, then it is now the land, which is the land of the United States, and the island of Hawaii has volcanic eruptions almost every year, and the magma flows to the sea and solidifies there to become land and expand the territory; If the eruption is strong, it can expand by a few square kilometers a year, or more. Most of these islands were formed by volcanic eruptions. Second, volcanoes can create a lot of natural landscapes, I can not say too much, most of the world's most famous scenic spots are volcanic areas, such as Yellowstone Park in the United States, Hawaii, Mount Fuji in Japan, Changbai Mountain in our country, Wudalianchi, and now there are 41 geoparks in the country, probably at least seven related to volcanoes, so the scenery in areas with volcanoes is almost beautiful.

When you go to Japan, you go to those volcanic areas to see, and there is an endless stream of tourists. This is the Yalu River Grand Canyon of Changbai Mountain, which is formed by volcanic slag and volcanic ash, which is such a spectacular scene. There is a main peak of Changbai Mountain, the General Peak, which belongs to North Korea, 2,755 meters high, and only model workers and some advanced elements can climb the General Peak on the North Korean side, which is an honor.

Some of the other natural landscapes, like Arshan, which we talked about in the press lately, we went there last autumn, and this is the autumn scene, and the crater lake in there, very quiet, beautiful mountains and rivers. This is Tengchong, you see if this landscape is very beautiful, this is our Yunnan Tengchong where the volcanic area, behind is the volcano, in front of some rice fields. Third, land resources, that is, mineral resources, formed by volcanism, are quite a lot of mineral resources, including non-metallic resources and metal resources.

That non-metallic resources are volcanic eruptions, almost any kind of volcanic rock can be used, some basalt is used as cast stone to develop, like the pumice stone produced in Changbai Mountain, volcanic ash and volcanic slag can be sold in woven bags, in fact, the price is more expensive than white flour, it is a good filling building material, repair high-grade airports, stadiums, if you want to fill with this volcanic slag, the quality is relatively high, high-grade cement is also made of volcanic slag as filler, so the volcano erupts almost everything is useful, This is in terms of non-metallic materials. There are also many minerals related to volcanic eruptions, if you are more interested in gemstones, some gems are volcanic eruptions; Many mineral resources, including some gold mines and some copper mines, are related to volcanism, so volcanoes can create a lot of mineral resources for us.

Many people know that volcanic ash after volcanic eruptions is rich in some very rich nutrients, and if these volcanic ash is used as fertilizer, crops on it will also fly and grow very well, but many people don't understand thisVolcanic ash can have an impact on the global climate, and too much ash can cause temperatures to drop.

When a volcano erupts, many people must have seen it on TV, they tend to be ejected very high, and in the process of volcanic eruptions, a lot of volcanic ash will be generated, and this volcanic ash will be ejected by the erupting volcano into the sky very high, and then it will drift higher with the windIf the thickness of the atmosphere increases, it will cause the sun's radiation to weaken, and the sun's radiation will decrease if the sun's radiation decreases, which will also lead to a drop in temperature.

At this time, the impact of volcanic ash on the climate, not only volcanic ash will damage the environment, first of all, the volcanic ash floating in the air is also a kind of dust, volcanic ash will first cause air pollution, the cleanliness index of the air will decline, and some of the air people breathe may contain some pollutants, and then have a certain impact on people's health. If a large amount of volcanic ash in the air is exposed to rain, it will produce some mud rain, which will plague the local population and cause some very big problems to the local residents. In addition, the erupted volcanic ash is actually corrosive, and if there are many buildings scattered near the crater, the volcanic ash will corrode the building if it falls on the building, and it is very easy to cause the collapse of the building and other phenomena.

However, we know that the distribution of volcanoes is characteristic, and there are many volcanoes in some areas, and volcanic eruptions occur, while in some places there are no volcanoes and volcanic eruptions.

The ash released by large-scale volcanic eruptions does not alleviate the greenhouse effect, which has already taken shape.

No, because volcanic eruptions, although they have a great impact, they are still insignificant to the entire greenhouse gases and cannot alleviate the greenhouse effect.

No, the ash released by a large-scale volcanic eruption does not alleviate the greenhouse effect, but rather pollutes the environment.

It will not alleviate the greenhouse effect, because the greenhouse effect has already taken shape on a global scale and will not be changed by a volcanic eruption.

There are serious natural disasters in daily life, their occurrence is caused by natural factors beyond the control of human beings, generally will bring certain economic losses to human beings, and is also the object of human research, human beings to study natural disasters are mainly to prevent and minimize the losses caused to human beings, and in life we are more common natural disasters mainly include: floods, landslides, mudslides, volcanic eruptions, etc., their occurrence is under the influence of certain factors. Such as volcanic eruptions, volcanic eruptions mainly occur in the intersection zone of continental plates, with growth boundaries and extinction boundaries, which are subject to strong movement of the earth's crust and continuous collision and extrusionSo what impact will the volcanic ash particles formed after volcanic eruptions have on human society? Volcanic eruptions will have an impact on the global climate, damage the environment and bring opportunities for rebirth, etc., volcanic ash contains a large number of particles, which will affect the cooling of the climate, and the size of the particles is incompatible with the substances in the air, causing climate change; Large amounts of lava flow can inundate villages and buildings, but large volcanic eruptions bring nutrients deep underground, which are beneficial for some plants and animals.

1. Adverse <>

Volcanic eruptions, first of all, to a certain extent, are natural disasters that bring losses to people's daily lives and affect people's living conditions, so it will bring some bad effects; Because a large number of volcanic eruptions will have a large number of particles with the ejection, and the content of these particles is relatively large, the air can not be purified in a short period of time, the air increases so much particulate matter in an instant, the cleanliness of the air will be greatly reduced, and the air quality will also be reduced will also affect the change of global climate, because the speed of air flow will bring particulate matter to other regions, which is also affecting the global climate; Moreover, a large amount of volcanic lava erupts out, and nearby villages or towns will also be flooded, causing greater economic losses, and in the flow of the road, it will slowly engulf things along the way, and the original good environment will also be affected by the materials emitted by the volcano, destroying the environment.

2. Beneficial impact <>

Volcanic eruption is from the ground, originally in the underground will store a large amount of rich liquid and rich energy to transport and bury the volume, volcanic magma will directly bring the underground material to the surface, with the passage of time, volcanic magma will slowly cool, and then people will plant some crops on it, because there is a large amount of material and energy in volcanic ash, which can meet the needs of animals and plants, which will also provide nutrients for plants to grow, and volcanic ash from volcanic eruptions is also a good nutrient to give animals and plants sufficient nutrients. <>

Therefore, the volcanic ash formed after the eruption will have some adverse effects on humans, but it will also bring certain beneficial effects, which may bring economic and property losses to people, and at the same time, these volcanic ash particles also contain a lot of energy, which can be used to supply the needs of animals and plants.

Volcanic ash contains a large amount of heavy metal elements, which can cause respiratory damage to humans, and can also lead to salinization of land and acid-base imbalance.

It will intensify the pollution of the environment, and it will make some unusual rain in the sky, which has a great corrosive effect on some things.

New species may emerge.

Volcanic eruptions have accelerated the melting of glaciers, creating floods and surging local river levels by 3 meters, threatening infrastructure such as roads and bridges. Volcanic eruptions alter existing ecosystems, in which new species may emerge.

After the death of marine life around the outbreak area, organisms adapted to high temperatures and sulphur dioxide will multiply and new ecosystems will be established, in which new species may emerge. The history of the Earth shows that volcanic activity plays an important role in the formation of the Earth's pattern, whether it is the formation of continental forms, the formation of the Earth's oceans and atmosphere, or the origin of life, all of which are related to submarine volcanic activity.

Disrupting the balance of ecosystems.

The presence of volcanic ash in large quantities can cause changes in the pH of seawater, which can have a great impact on the entire ecological environment. In the explanation for the disappearance of dinosaurs at the end of the Cretaceous period, the popular view is that meteorites bombarded the earth and induced a large number of volcanic eruptions, causing black clouds to cover the land, affecting plant photosynthesis and causing plant decline, and the first of these effects was tropical plants.

Large amounts of sulfur dioxide, carbon dioxide and other substances formed by volcanic eruptions interact with moisture in the atmosphere to form acid rain into the ocean. Acidification will help the growth of organisms that thrive on calcium carbonate, including phytoplankton called coccolithalgae, planktonic foraminifera and pteropod mollusks, which are the main food for fish and marine mammals, including some cetaceans**, and therefore have the potential to alter the balance of the ecosystem. The severe impact of ocean acidification on coral reefs has been a global concern.

Global coral reef bleaching and ocean acidification are directly related.

Moderate amounts of phosphate, iron, and other nutrient and biologically active trace metals released by volcanic ash and volcanic eruptions are beneficial for the growth of phytoplankton, etc., but excessive amounts may form a non-biotic zone in local seas.

It will not contribute to the cooling of the global climate.

For example, in 1815, when Mount Tambora erupted in Indonesia, a large amount of volcanic smoke and dust entered the atmosphere to block the sunlight, making the global temperature drop in the following year, becoming the famous "year without summer", and many places in Asia, Europe and the United States also experienced widespread grain failures due to weather changes.

As for the eruption, most scientists believe that the eruption is much smaller than the eruptions that have historically cooled the global climate, so it will not significantly change the climate.

Alan Lobock, an American volcanologist, commented: "This eruption has no impact on the climate. "Models from the Met Office's Volcanic Smoke Advisory Centre show that in the future, the weather in Europe will not change significantly as a result of an Icelandic eruption.

Some experts also believe that in the short term, the temperature in local areas will be higher and then lower after the volcano, but in the long run, the general volcanic eruption will have little impact on the climate.

There is no impact on the health of the population.

Volcanic smoke is very fine and pervasive. According to the results of the analysis by the University of Iceland, a quarter of the volcanic smoke emitted by the volcano is tiny particles that cannot be seen with the naked eye, and the fluorine content of the soot is very high.

Volcanic smoke has also triggered volcanic effects on human health. On April 20, 2010, Carlos Dora, an environmental epidemiologist at the World Health Organization, said at a press conference that to date, the ash has had no impact on the health of people in other parts of Europe, except for people living near the area of the eruption in Iceland. Dola said that in the vicinity of the eruption area of Iceland, volcanic ash particles can cause allergic symptoms, and people must take protective measures such as wearing masks and goggles when going out and stay indoors as much as possible.

In other parts of Europe, online data from cities monitoring ground pollution so far shows that air quality in these cities has varied at normal levels, proving that the ash remains high above the ground, not reaching the surface, and that the health of residents has not been affected.

Dora analyzed that it was unlikely that the landing, allowing the ash particles to accumulate on the ground.