Many places in Daxinganling, Heilongjiang suffered the coldest weather in 40 years. How is extreme weather caused?

What is extreme weather? According to the interpretation of meteorology, it refers to the rare meteorological events in a certain area in a certain period of time, that is, small probability events, including extreme high temperature, extreme low temperature, extreme drought and extreme precipitation. At present, it is recognized that the main cause of extreme weather is global warming, in addition to the influence of celestial movement and the result of climate change cycle.

The cause of global warming

The process of industrialization and modern science and technology have brought many benefits to mankind. Cars, refrigerators and air conditioners all make people live comfortably, but the negative effects are gradually increasing: the rapid increase of various scientific and technological products and even the population has increased the emission of gases such as carbon and nitrogen oxides, which has led to the destruction of the ozone layer? The ozone layer can shield solar radiation and effectively protect the biosphere. It is broken and broken, and the earth is directly affected by the melting pot of the sun? Care? More, warming is the inevitable result.

The impact of climate warming

Climate warming has two effects. On the positive side, some sub-polar regions will become suitable for human habitation, and the increase of carbon dioxide concentration can promote photosynthesis and increase the yield of plants (crops) under appropriate conditions. The bad aspects are more obvious, such as air pollution, environmental deterioration and resource shortage year by year. It can be seen from the public information released by the World Meteorological Organization that the average temperature of the earth rose by about 0.6℃ in the 20th century alone. Since 1990s, the sea level has risen by about1~ 2cm to 2 100. With the melting of the ice sheet caused by global warming, this figure may expand to 70cm.

The motion and interaction of celestial bodies lead to climate change.

There is a famous one in meteorology? Butterfly effect? It is said that a butterfly flapping its wings in the Amazon rainforest may trigger a tornado in Texas within two weeks.

In the vast universe, the earth is just one of the celestial bodies. The gravitational interference of other planets will change the orbit of the earth, and the speed of the earth's rotation and revolution will be accelerated or slowed down, which will directly change the geographical and seasonal distribution of solar radiation energy, affect the formation or melting of ice sheets, and then affect the whole ocean and atmospheric circulation; The difference of sunshine time is related to the absorption and release of greenhouse gases such as carbon dioxide by vegetation, soil and ocean, which is equivalent to the extreme weather and chain reaction caused by countless butterflies flapping their wings, which is an inevitable result.

The result of periodic climate change.

The climate changes periodically, alternating cold and warm, and the four seasons reciprocate. According to the definition of scientists, our time is between the sub-glacial period and the interglacial period of the Quaternary Great Ice Age (from 2 million years ago? Now), the climate at this stage is characterized by great changes, and glaciers have to go through many advances and retreats, which objectively increases the probability of extreme weather.

Anyway, the Daxinganling area in Heilongjiang Province has recently suffered the lowest temperature in 40 years for many times, such as the lowest temperature of -48.9℃ in 4 1 year measured by the unmanned automatic station in Baishan Scenic Area in Huzhong and the lowest temperature of -48.7℃ in amuer Town of Mohe City, which has brought many difficulties to people's production and life. Pour water into ice? 、? Yogurt sticks to the pot? The small video is beautiful and strange, but the consequences of environmental degradation cannot but be vigilant.