The United Nations has recently issued a warning about the possible impact of warming on the world. Domestic scholars have analyzed that Taiwan's century-old climate warming rate in the 20th century is about twice the global average, resulting in a smaller temperature difference between day and night and shorter sunshine hours throughout the year. With the number of countries shortening and rainfall intensity increasing, the impact in the future may be more severe than that of most countries. Excessive development has caused the heat island effect, causing the global average temperature to rise in the 20th century○. Six degrees, Hsu Huang-hsiung, a professor at the Department of Atmospheric Science at National Taiwan University, pointed out that Taiwan’s average temperature rose by as much as 1.6 degrees Celsius from 1901 to 2000. At one point, the warming rate was twice that of the world; warming occurred not only in urban areas, but also in Yushan and Dongji Island. He said that the warming rate far exceeding that of the world is not just a problem in Taiwan. The rate of increase in Asia (except southwestern China) is almost the highest in the world. Domestic meteorologists mostly believe that this is related to the heat island effect caused by excessive urban development, which has a additive effect on global warming. The warming trend in summer is more obvious than in winter. Xu Huangxiong analyzed that the warming trend in Taiwan is more obvious in summer than in winter. At six major weather stations in Taipei, Taichung, Tainan and Hualien, the average summer temperature in the 20th century increased by 1% per century. Thirty-seven degrees, ○ higher than winter. Five degrees, the increase in spring and autumn is also equivalent to that in summer, which is contrary to the phenomenon that the temperature increase in winter is greater than in summer in high latitudes. In addition, in Taiwan, the temperature rises more significantly at night than during the day, resulting in a narrowing of the temperature difference between day and night. In the late 1980s, the probability of high temperatures increased and the probability of low temperatures decreased. The intensity of heat waves became stronger, more pronounced in urban areas than in rural areas. After the 1970s, ,cold
