Why can a butterfly flap its wings in the Pacific Ocean to form a typhoon?

This is what we call the "butterfly effect". You can look at Baidu's "butterfly effect" entry. Butterfly effect means that in a dynamic system, small changes in initial conditions may lead to a long-term huge chain reaction of the whole system. Edward lorenz, an American meteorologist, analyzed this influence in the paper 1963 submitted to the New York Academy of Sciences. "A meteorologist mentioned that if this theory is proved to be correct, a seagull flapping its wings is enough to change the weather forever." In later speeches and papers, he used more poetic butterflies. The most common explanation for this effect is: "A butterfly flapping its wings in Brazil can cause a tornado in Texas a month later." The source of this sentence is that meteorologists have made a computer program that can simulate climate change and represent it with images. Finally, he found that the image was chaotic. And it is very similar to the wings of a butterfly, so he vividly interprets this figure in the way of "butterflies flapping their wings", so there is the above statement. Butterfly effect is usually used in more complex systems, which are difficult to predict in a certain period of time, such as weather and stock market. This effect shows that the result of the development of things is extremely sensitive to the initial conditions, and the deviation of the initial conditions is very small. Will lead to very different results. Sociologically, the butterfly effect is used to explain a bad tiny mechanism, which will bring great harm to society if it is not guided and adjusted in time, and is dubbed as "tornado" or "storm"; A good micro-mechanism, under the correct guidance and after a period of efforts, will produce a sensational effect, or "revolution." The butterfly effect, also known as nonlinearity, often appears in chaos.