Center pressure, winter pressure The normal center pressure ishurricaneTogether.The area where the isobaric line is closed and the central pressure is lower than the surrounding pressure is called low pressure.The large air vortex in the low pressure area is called cyclone.
The normal central pressure is associated with hurricanes.
IsobarClosed, the area where the central air pressure is higher than the surrounding air pressure is calledHigh barometric pressure。The large air vortex in the high pressure area is calledAnticyclone。
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The central air is prone to cloud formation and rain in the rising process, so when cyclones pass through, cloudy and rainy weather often occurs.In summer and autumn, typhoons along the southeast coast of China are a special form of intense tropical cyclone development.
During the sinking of the central air, due to the rising temperature, the water vapor gradually evaporates, which is not easy to form clouds and rain. The weather is sunny, hot and dry in summer, and cold and dry in winter.The midsummer drought in the Yangtze River basin in ChinaSubtropical highFormed under the control of an anticyclone.
Impact of land and sea distribution on the atmospheric circulation: due to the difference in thermal properties between land and sea, the pressure zone and wind zone are damaged, forming the activity center of land and sea pressure in winter and summer, and then forming the monsoon circulation (as shown in the figure Central Pressure, Summer Monsoon).
