Influence of temperature on climate system

The geography teaching plan of the second senior middle school in Lishui District (compulsory) 20 15- 1

1 weather conditions under the influence of common weather systems 1. Frontal system is the main factor affecting the weather change, which has a great influence on the precipitation change, drought and flood in the world and China.

The occurrence of harm has a far-reaching impact. The key to review is to grasp the characteristics of the previous activities.

quasi-stationary front

Generally speaking, the front warm air mass actively moving in the direction of warm air mass and the front cold air mass actively moving in the direction of cold air mass have the same force, which makes the front swaying back and forth distinguish air mass from cold air mass, with strong warm air mass, weak warm air mass and weak cold air mass, which are evenly matched. The cold air mass is in front of the rear cold air mass, and the warm air mass extends to a large range behind the front in the rear rain area. The chart in front shows the weather chart. The rainy area is controlled by a single warm air mass before crossing the border, which is warm and sunny and sunny at low temperature. When the weather is clear, the warm air mass is lifted by the cold air mass, and there are often weather phenomena such as cloudy, rainy, windy and cooling. The warm air mass climbs slowly along the cold air mass, and the continuous cloud and rain warm air mass is cooled, condensed, lifted or climbed, forming a continuous precipitation weather feature. After crossing the border, the cold air mass replaced the original warm air mass, and the air pressure increased and the temperature and humidity plummeted. The warm air mass occupied the position of the original cold air mass, the temperature rose, the air pressure dropped, and the weather turned fine-the air mass was controlled and the weather turned fine. Most of China's precipitation weather, northern summer rainstorm, winter and spring gale sandstorm cold wave, Jianghuai area rainy season, Guiyang half-year rainy season, the middle and lower reaches of the Yangtze River rainy season in June.