In recent years, extreme weather has erupted one after another, such as the australian forest fire burning for 7 months, the Philippine volcano eruption, the Antarctic temperature exceeded the 20 °C extreme, the east African locust disaster on agriculture, the drought and high temperature caused by the North American heat wave, the flood disaster in Europe for thousands of years and so on.
And China is no exception, take this year, at the beginning of the year, it encountered a "overlord-level" cold wave, but soon and rapidly warmed up, and the cold winter also became a warm winter; the northern spring sand and dust problem was severe, ushering in a rare super sandstorm in 10 years; and then in April, thunderstorms and winds began to hit frequently, and 4-9 months ushered in 17 or more intermediate tornadoes.
In the summer and autumn, the rain in the north increased significantly, and the rainfall in Zhengzhou in July exceeded the inland extreme, and the precipitation in Hebei, Shaanxi, Shanxi, Henan and Beijing in September and October hit a new high in 1961. As for why, meteorological experts said that the subtropical high pressure is strong and northward, so that a steady stream of water vapor enters the northern inland, forming a "northern flood and southern drought" meteorology.
In the context of global warming, extreme weather is increasing, what is the reason behind this? On the 26th, China Meteorological News published an article "Why is The Extreme Weather "Pandora's Box" Frequently Opened?" The authoritative answer is coming! The article analyzes in detail the causes of extreme weather.
Speaking of this topic, it is impossible to ignore the fact of global warming, there are reports that the average temperature in 2011-2020 increased by 1.09 °C compared with 1850-1900, which shows that global temperatures are indeed rising, and it is global, which also causes the global climate system to fluctuate violently. Temperatures are expected to rise above 1.5°C in 2030, and if the forecasts are realized, the Paris Agreement's plan to limit warming will be difficult to achieve.
The report also pointed out that with the global warming, sea levels are also gradually rising, drought, heat waves, floods and other extreme climates are increasing, and tropical cyclones are also strengthening, the original 50 years of rare heat waves, now every 10 years will appear, and this year North America, Russia suffered heat waves, so that Seattle, Moscow temperature approached 50 ° C in the spring.
Studies have also shown that the five years from 2016 to 2020 were the hottest five years recorded after 1850. With the frequent occurrence of climates such as heat waves, the rate of sea level rise has accelerated by 2 times.
Of course, global warming is also caused by man, due to the over-industrial development of human beings, the destruction of limited natural resources, so that those primary forests have been artificially burned or cut down, such as the 2 years of Australia, Amazon forest fires, a burning is several months, making ecological imbalances, a large number of animal extinction, greenhouse effect intensified again, the Arctic, Antarctic glaciers accelerated thawing.
A number of reports and data have shown that the culprit behind the frequent occurrence of extreme weather is global warming. Affected by warming, arctic sea ice melts faster, and thus forms an "Arctic amplification effect". From 1971 to 2019, the Arctic warmed three times faster, which also contributed to an increase in the rate of sea level rise.
Affected by the "Arctic amplification effect", the westerly wind belt in Eurasia began to weaken, and the Ural high pressure ridge strengthened, both of which strengthened the Siberian high pressure, making the cold air in East Asia frequent and strong, and the extreme cold and warm events increased.
Of course, there is another big accomplice in extreme weather, and that is the ocean. As the "heat reservoir" of the ecosystem, since the 1990s, the rate of increase in SST has increased by 1 times, and it is the warming of the ocean that has also increased the frequency and intensity of extreme cold and warming and heavy rainfall. Rising SST also strengthens stronger typhoons/hurricanes, and weakens slowly and lasts longer after entering the continent.
This year, there is more rain in the north, in fact, the main reason is that the subtropical high pressure is strong, and behind it is due to the increase in the sea temperature of the Indian Ocean - South China Sea - Central and Western Pacific Ocean, the increase in water vapor is more, and the continuous flow of water vapor is transported to the inland, resulting in heavy rainfall events.
In previous years, China's summer "south flood and northern drought", but now the sea temperature rises, the climate system is disordered, so that the subtropical high pressure is strong to the north and west, Henan is located on the edge of the sub-high pressure, convection is unstable, coupled with typhoon "fireworks" on the ocean "wind and waves", to Henan to transport super strong water vapor, and then by the Taihang Mountain, Funiu Mountain terrain on the air flow of the impact, thus brewing an extreme flood.
If the trend of global warming in the future cannot be alleviated, then the extreme weather in the future will only increase, and it will break through the extreme value one after another. It's time for humanity to wake up!
But reversing global temperatures will take a long process. Even if the task of reducing emissions is outstanding in the next 10 years, temperatures will continue to rise, rising by 1.5°C in 2040 and 1.6°C in 2060 before stabilizing.
But if countries do not cooperate with the task of reducing emissions and continue to greedily grab natural resources, the vicious circle of global warming will continue to increase, and its disasters will only become more severe and frequent.
At present, China has formulated emission reduction tasks, and it is expected to achieve "carbon peak" in 2030 and "carbon neutrality" in 2060, contributing to global emission reduction. It is believed that under the awareness of the whole people to reduce emissions, the average temperature increase in the future will gradually decrease and stabilize.
However, emission reduction can not only be a matter of one country, but also requires the joint efforts of countries around the world, while economic development, but also respect the laws of nature, so as to establish a more moderate ecosystem, to avoid the further strengthening of extreme climate, what do you think?
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