Causes of wildfires in China and Mongolia
This Maar type volcanic group is well preserved without quaternary soil cover and water filling. Volcanic fragments from volcanic eruption and collapse are stacked on the edge of the crater. These fragments form a ring of rock fragments centered on the crater. The caprock Hannuoba olivine basalt is widely distributed in this area, and its formation age is 33million-9.4 million years ago, which means that the formation of this negative terrain crater group is later than that of Hannuoba olivine basalt.
Question to consider: why is there no water in the crater? Does it not rain here? Or too much evaporation?
A: rainfall here has little to do with evaporation. Rainwater has infiltrated into the ground, which is similar to karst landform. It is basalt, not limestone. Not only water can penetrate, but also underground coal-bed methane can emerge. Grassland fires can occur in the presence of open fires.
Volcanoes are a common sight in the eastern part of Inner Mongolia Autonomous Region. There is a volcanic eruption zone: the Nuomin River Volcanic Group in the north of Daxing'an Mountains (the Volcanic Group is mainly distributed in the Nuomin River Basin in the north of Daxing'an Mountains, which is 30 kilometers away from the south of Oroqen Autonomous Banner in Hulunbuir city and northwest of Nuomin town. It is located in the north section of Datong Daxing'an Mountains Cenozoic volcanic activity zone, with an area of about 7500k ㎡), It passes through Arshan Chaihe Volcanic Group, Xilinhot Abaga Volcanic Group, and reaches ulanhada Volcanic Group in the right rear banner of Chahar in the south, stretching nearly 1000 kilometers.
There are five volcanic groups distributed on the Cenozoic volcanic activity belt in Datong Daxinganling. Make an extension line to the south along the Cenozoic volcanic activity belt and extend to Kunming. You will find that all the mountain fires in China are on this straight line, or not far from the straight line, because there is a fault zone connected with it. This is a large fault zone running through north and South China. Many secrets and stories are hidden under the fault zone.
At 12:47 on April 20, 2023, a grassland fire occurred in Mongolia in the northwest of kerlunsumu, new Barkhor Right Banner, Hulunbuir city. The color of the smoke was extremely white and high. It occurred at the same time as the sandstorm, which was mixed with fire.
At 12:47 on April 20, 2023, a grassland fire occurred in Mongolia, northwest of kerlunsumu, new Barkhor Right Banner, Hulunbuir city,
At 12:00 (China time) on April 20, 2023, the satellite cloud image showed that in the southeast of bell lake, starting from the north of the fire on April 10, a sandstorm appeared southeast, drowning the black ash of the fire. White water vapor appeared in Hulunbuir city in parallel directions. Northwest of kerlunsumu, new Barkhor Right Banner, Hulunbuir City, where the grassland fire occurred in Mongolia, is on the line of sandstorm, which is in line with the fire on the 8th.
At 12:47 (Chinese time) on April 20, 2023, a fire broke out in kersumu, new Barkhor Right Banner, Hulunbuir city.
The height and density of Setaria pilosa, the flame of combustion is not very high,
Even if there is a 5-6 extreme wind, the flame and smoke are so high, and the tall smoke in the distance is volcanic ash from the ground, that is, sandstorm. Don't rush to refute, read it and make comments.
At 14:45 on April 8, 2023, a prairie fire broke out in the northern part of samesumholqige, dongujimqin banner, Xilingol League, Inner Mongolia. The fire spread to the Chinese border. Look at the strange flame color. It is orange. The flame is high. The pure combustion of Setaria pilosa will not be orange flame, and the flame will not rise so high. This is the underground coalbed methane mixed in the conifer grass. This coalbed methane is adsorbed on the plant surface in the form of aerosol, reaching a certain density. When it encounters open fire or is heated by the high-temperature flue gas from underground, it will burn at the point of spontaneous combustion, just like white phosphorus scattered on the plant surface.
At 12:00 on April 22, 2023 (China time), the weather was sunny, and the fire in kersumu, new balhu Right Banner, Hulunbuir city was clearly visible. Three fires were on the same line, parallel to Hulun Buir Hu.
At 12:00 am on April 13, 2023, the satellite image shows that from April 9 to 12, 2023, a large area of fire was burnt, and multiple fires occurred repeatedly in one place, all of which were on the same line,
April 9, 2023 to May 7, 2023
