The relationship between geographical pressure in high school

The relationship between air temperature and air pressure. Thermal low pressure, cold high pressure, thermal low pressure and cold high pressure formed by thermal reasons are all air pressure relations formed by thermal reasons. The uneven surface heat and cold is an important reason for the change of air pressure. 1. Thermal low pressure: Thermal low pressure is the dual expression of air temperature and air pressure, and they are related. "Low pressure is caused by heat". The following figure 1 is a schematic diagram of thermal cycle. The gas near point A near the ground is heated and expanded, which reduces the air density near the ground and forms a low pressure near the ground. This is the "low pressure" caused by thermal reasons. The equatorial low pressure zone is the most typical thermal low pressure zone. In summer in the northern hemisphere, due to the different heat capacities of land and ocean, the land heats up quickly and cools down quickly, so the land at the same latitude