Some time ago, there was a large-scale forest fire in Australia. The forest fire in Australia has lasted for three weeks. The continuous fire once led to a state of emergency in many places, and the turbulent smoke even floated into the urban area of Sydney. The smoke flew across the Pacific to South America.
Forest fires in Australia last three weeks
In November, when the northern hemisphere is heading for winter, the horn of spring has also blown to the southern hemisphere, but for Australia, this is a disastrous spring - in the three weeks since November 2019, fires continue to sweep the southern and eastern states of Australia. As of November 20, government agencies had a total of 45 fires in South Australia and 49 fires in New South Wales.
For example, at 11:25 p.m. local time on November 17, a satellite from NASA aimed at Macquarie port, New South Wales, and the satellite recorded night images of the raging fire. It looks scary. The continuous fire once led to a state of emergency in many places. The turbulent smoke even floated into the urban area of Sydney, darkening the sky and reducing air quality. Local officials said it was the worst fire in southeastern Australia since 2009.
Of course, the impact of this terrible fire is not limited to this. NASA researchers pointed out that the thick smoke generated by the Australian fire rose into the atmosphere and floated to the other end of the world - satellites detected a large number of aerosols and combustion pollutants over South America at the other end of the Pacific Ocean. These substances are determined to be from the fire in Australia, The smoke from the fire spans the Pacific Ocean and is flying across the South Atlantic.
Smoke flew across the Pacific to South America
Researchers from NASA said that the smoke from the Australian fire rose to 12-13 kilometers in the atmosphere, which is an abnormal height for ordinary field fires. Mike middot, a fire researcher at the U.S. Naval Research Laboratory; Fromm said the event was special because it has not been confirmed why the smoke can reach such a high atmosphere.
Fire will burn forests, vegetation, houses and other materials. In this process, a large number of gases and particles will be released, including carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, organic carbon and fine particles (PM2.5). Among them, black carbon is one of the typical representatives. It is an aerosol substance, which is particularly harmful to human and animals, because these particles are small enough to enter the lungs and blood.
When these pollutants enter the upper atmosphere, they can spread to the ocean and other continents with the atmospheric circulation, and can exist in the atmosphere for weeks or even months. In addition to the health effects on people and animals, black carbon and other substances will also darken snow and ice and accelerate melting. In the atmosphere, these particles will absorb or block sunlight, affect the formation of clouds, and may increase or reduce rainfall. The release of smoke on such a large scale in Australia, researchers believe, may affect the climate.