Introduction: The volcano is a sleeping male lion, once awakened, the lethality is extremely strong! From the 20th to the 24th, the largest rain and snow weather in the country arrived, involving 25 provinces. Is this wave of heavy precipitation related to the volcanic eruption in Tonga?
Today is the great cold festival, the reverse pole of the cold, called the great cold. "The cold reaches its peak, and it gets warmer later." Therefore, the Great Cold Festival is the coldest winter of the year, and after the heavy snow of the snow, the scope is wide, which is the characteristic of the Great Cold Festival. The arrival of the great cold festival means that the weather is colder, and it also means that the footsteps of spring are near.
The latest weather forecast: there is more snow in the north, more rain in the south, and there are heavy snow and local blizzards in the eastern part of Shaanxi, southern Shanxi, southern Hebei, Henan, the western part of Shanxi and the mountainous areas of southern Tibet. There is more rain in the south and more snow in the north, and there are heavy rains and localized heavy rains in parts of eastern Guizhou, central and southern Hunan, central Jiangxi, northern and eastern Guangxi, northern Guangdong, and northern Fujian.
Recently, the weather forecast, this round of nationwide rain and snow weather to the 24th, the scope of influence involved more than 25 provinces, only Heilongjiang, Jilin Province did not have rain and snow weather in the country, Liaoning Province only accounted for one side, the area is not particularly large. So, this is the first wave of large-scale rain and snow weather.
Is the largest snowfall in the country and the formation of the rainfall process related to the volcanic eruption of Tonga? Experts give the answer.
On January 15, in the country of Tonga in the South Pacific, a natural disaster occurred in a violent eruption of island volcanoes. This natural disaster caused great disasters to the Tangshan country and the surrounding areas, and it can be said that "the volcano is a sleeping lion, once awakened, it is very powerful."
The Tangshan volcano erupted, and the erupting ash cloud broke through the top of the troposphere, forming an umbrella-shaped cloud with a diameter of nearly 500 kilometers. It was the largest eruption in 30 years. Will volcanic eruptions change global temperatures? At present, it has become a topic of concern for everyone, and it is a hot topic, and experts have also come forward to explain.
Some experts believe that the volcanic eruption in Tonga will have a continuous impact on the global and East Asian climate in the next 1 to 2 years, with a cooling effect of about 0.3 °C. For the mainland, volcanic eruptions weakened the intensity of east Asian summer winds the following year, which in turn led to a southerly summer rain band on the continent. That is to say, the possibility of drought in the north this year and next year is relatively large, and the rain in the south is increased, and the probability of flooding is large.
In the last 100 years, there have been three large-scale low-latitude eruptions, namely the eruption of Mount Agung on 17 March 1963, the eruption of Elchjorn on 4 April 1982, and the eruption of Pinatobo on 15 June 1991. In the winter of the year after the three eruptions, from December to February of the second year of that year, for a total of three months, except for the largest areas in the mainland, the northeast and Xinjiang, which were not much affected, the temperature was low elsewhere.
Of course, the "La Niña" phenomenon is also a reason for the drop in temperature. It is indeed a bit of a coincidence this year that the La Niña phenomenon continues to occur, and there is another eruption of Mount Fuji in Japan, and now it is the eruption of Tonga Volcano, which has a certain impact on the weather changes around the mainland. In particular, this year's La Niña has occurred twice, and the most recent impact is in North America and Europe, where there is a huge snowstorm, the temperature drop is so wide that it can be said that it has caused great inconvenience to local agricultural production and travel, and has formed a serious snow disaster. However, the impact of the La Niña phenomenon on the mainland this time is not too large, because the weather has been relatively warm recently, and the rain and snow weather is not particularly much.
What is the reason why volcanic eruptions can cause global temperatures to drop? According to experts, the main reason why volcanic eruptions cause cooling is that it injects sulfur-containing aerosols into the atmosphere, which enter the stratosphere and help the earth reflect more sunlight, thus creating a cooling effect in the atmosphere. That is, volcanic eruptions will form a large amount of sulfur dioxide gas, which forms an effective scattered mushroom cloud in the atmosphere, which will block the sun's rays and greatly reduce the heat absorbed by the earth.
The eruption in the year of the 1991 eruption in the Philippines emitted up to 20 million tons of sulfur dioxide, causing a global under-cooling impact of 0.53 degrees. According to satellite monitoring reality, the release of sulfur dioxide on the first day of volcanic eruptions on the island of Tonga was 62 kilotons. That's too much different from 20 million tonnes, so to achieve a global cooling effect, only the Tonga eruption can exclude the combined sulfur dioxide.
According to the latest news released by Tonga, the disaster situation is very serious. The eruption of an undersea volcano triggered a tsunami of up to 15 meters, causing an "unprecedented catastrophe". Three people were killed, many houses were destroyed, good volcanoes erupted, water and electricity were cut off around them, and the influence of network contact signals was lost, and the destructive power was very large.
The volcanic eruption in Tonga had a great impact on the surrounding area and formed a very large tsunami that spread to countries thousands of kilometers away, such as the continued sea level rise of 0.3 meters on the west coast of North America, and the formation of a 1.2-meter tsunami around Australia, which posed a great threat to maritime transport.
According to experts, the current volcanic eruption in Tonga has not had much impact on the continent's climate, and if so, it will take a few months to affect the continent's summer climate this year. After all, the continent is very far from the South Pacific, and the clouds of volcanic ash formed cannot cover our side.
At present, the large area of rain and snow weather on the mainland is coming, mainly the La Niña phenomenon has played a role. The La Niña phenomenon is the result of hurricanes, drought in the south and floods in the north and cold winters. At least now it is causing heavy snowstorms in North America and Europe, with temperatures in texas in the southern United States dropping at 34.5 degrees Celsius overnight to temperatures of minus 17 degrees Celsius, and the blizzard reaching 30 centimeters later. Such a rapid cooling fell from the middle of summer to the cold winter, caught the local residents by surprise, many people had a cold, and even some people froze to death.
The continent is on the east coast of the Pacific Ocean, the Middle East Pacific Ocean formed a low-pressure warm stone, the air flow is constantly upward, especially near the equator, the Water Temperature of the Pacific Ocean begins to drop, thus forming a process of effective rainfall on the continent. In particular, the southern branch of the eastern Qinghai-Tibet Plateau, the cold water system continues to go north, with the cold air from the south this time, forming a rainy south, and the rainfall of one day exceeds the rainfall of one month in previous years.
In short, for the mainland, a wide range of rain and snow weather is coming, and the north is dominated by snowfall, and blizzards will form in north China and Shandong, Shanxi, Henan and other places. In the south, exceptionally heavy rainstorms formed, mainly in the provinces of the middle and lower reaches of the Yangtze River. The area formed by this round of exceptionally heavy rainstorms, the amount of precipitation, the magnitude of the cooling, and the strength of the wind are unprecedented.
However, the large-scale rain and snowfall process on the mainland was not caused by the eruption of the Tonga volcano, but by the La Niña phenomenon. The climate change effect of the volcanic eruption in Tonga, which should be in the following months, that is, this year predicted by experts, is expected to become a "summerless year", the summer will not be too hot, the expected three-volt days may be less, the temperature will be more suitable, but it is not conducive to the growth of crops.
According to the analysis of relevant experts, the impact of the Tonga volcanic eruption on the mainland may be that the rainy season will move southward, and there may be drought in the north. But this year's winter will not have much impact, and the current impact is only in the South Pacific and the surrounding 1,000 kilometers.
Today is the arrival of the great cold festival and the arrival of a large area of rain and snow weather on the mainland, and now it is only wandering in the north china, and it has brought a lot of snowfall. However, this cold wave will continue to move south, and there will be a precipitation process along the way. For this large-scale rain and snow weather on the mainland, it was not caused by the volcanic eruption of Tonga, but the normal climate change situation.