What are the characteristics of meteorological disasters?

Characteristics of meteorological disasters

A, the highest frequency.

B, the largest range of occurrence.

C, the most harmful.

D, the loss is the most serious. The quality is outstanding. Some disasters often occur in multiple areas at the same time, such as thunderstorms, hail, strong winds, tornadoes and other strong convective weather, which often occur in groups from March to May every year.

In April 1972, 1522, hail occurred in more than 350 counties and cities in Liaoning to Guangdong * *, 16 provinces and regions, and severe weather such as strong winds and tornadoes occurred in some areas.

Basic factors affecting climate formation

There are mainly solar radiation, atmospheric circulation and underlying surface. Climate differences in different regions and seasonal alternation of local climate are mainly the result of uneven distribution of solar radiation on the earth's surface and its changes with time.

Monsoon circulation guides the movement of air masses, so that heat and humidity can be transferred and adjusted everywhere and the balance of heat and humidity on the earth can be maintained; Monsoon circulation often weakens the leading role of solar radiation and plays an important role in the formation of climate.

Underlying surface refers to the condition of the earth's surface, including land and ocean distribution, topography, vegetation and soil. Because of their different characteristics, they affect the radiation process and the properties of air.

In addition to the above three natural factors, human activities also play a vital role in the formation of climate. At present, it is mainly manifested in:

First, greenhouse gases and various pollutants discharged into the atmosphere in industrial production have changed the chemical composition of the atmosphere;

The second is to change the nature of the underlying surface in the development of agriculture and animal husbandry, such as urbanization, forest and grassland vegetation destruction, marine oil pollution and so on.