Reasons for the formation of sea breeze in Qinhuangdao
The reason for the formation of sea breeze is that the air has air pressure, which is the weight of atmospheric column per unit cross-sectional area. Whether influenced by thermal factors or dynamic factors, the change of air pressure is related to air density.
When the air density changes to atmospheric pressure, the air density decreases and the air pressure decreases. Sea breeze belongs to local circulation. Because of its large specific heat capacity, the temperature of seawater is slower than that of land.
During the day, the land temperature is high, the air expansion density decreases, the air pressure drops, and the air moves from the high-pressure sea surface to the low-pressure land; The opposite is true at night.
Climatic characteristics of Qinhuangdao
The climate type of Qinhuangdao city belongs to warm temperate and semi-humid monsoon climate.
Because it is adjacent to the ocean, it is greatly influenced by the ocean, with mild climate, little rain and dryness in spring, warm summer without heat, cool and sunny autumn and long winter without severe cold.
The annual average temperature is around 1 1℃, 1 month is the coldest, and the monthly average temperature is -4.8℃. July is the hottest, with an average monthly temperature of 25℃. The annual rainfall is about 630mm, with 70% concentrated in June, July and August in summer.