Atmospheric circulation is formed near the patio surface.

Horizontal circulation, vertical circulation and mixed circulation.

1, horizontal circulation, horizontal circulation is the most common form of atmospheric circulation near the ground of patio, which is mainly caused by horizontal airflow, pressure difference and wind force. The change of horizontal circulation will lead to the generation and change of wind and have an important impact on weather and climate.

2, vertical circulation, near the ground in the patio, there will be vertical circulation, which is mainly caused by air flowing in the vertical direction, temperature difference and terrain. The existence of vertical circulation can cause the air mass to rise or sink, and affect the atmospheric stability and precipitation formation.

3. Mixed circulation is a combination of horizontal circulation and vertical circulation, which contains the flow characteristics in both horizontal and vertical directions. The mixed circulation is the result of many factors, which plays an important role in atmospheric movement and mixing.