Is the hottest summer in history coming? Zhejiang Climate Center responded.
"In the context of global warming, the average temperature in Zhejiang this summer is slightly higher, and there are more high temperature days. The heat is still the main theme. " Senior engineer of Zhejiang Climate Center said that there is a high probability of staged high-temperature heat waves this summer, and extreme high temperatures above 40℃ may occur in some areas.
It is worth mentioning that it is less likely to reproduce last year's large-scale persistent extreme high temperature events this year. At the same time, the degree of summer drought in Zhejiang this year has eased compared with last year, but it is necessary to focus on the central and western Zhejiang and northern Zhejiang, otherwise it will encounter staged meteorological drought. In the past five years, typhoons landed directly in Zhejiang, and the impact of typhoons this year will be more serious than before.
Factors affecting hot weather:
1, the surface is too hot: With the rapid development of science and technology, it can be clearly seen that the average temperature in China is gradually rising. For example, from the earth's point of view, in the past 100 years, the average temperature of the earth has reached more than 1 1 degree. Most of the heat is radiated through the surface of the earth. After the local surface temperature rises, it is very likely that extreme high temperature weather will occur. This extremely hot weather is often caused by the surface being too hot.
2. Man-made influence: A large number of artificial structures in the city, such as paving floors and various building walls, have changed the thermal properties of the underlying surface. Urban surface water content is less, and more heat enters the air in the form of sensible heat, which leads to an increase in temperature. In addition, motor vehicles, industrial production and a large number of human activities in cities produce a lot of nitrogen oxides, carbon dioxide, dust and so on. These substances can absorb a lot of energy from the thermal radiation in the environment, which leads to the further increase of atmospheric temperature.