Circulation Systems Over China

Introduction of the circulation system in China: The Earth 's atmosphere is constantly moving. This movement tries to balance the constant difference between pressure and temperature between different parts of the earth. This movement carries water from the sea to the mainland, provides rainfall, conveys heat from the tropics to the polar regions, and warms the high latitude. This cycle is to play a fundamental role in maintaining the stability of the atmosphere and creating a climatic zone that characterizes various parts of the earth.

A pressure gradient is required for the fluid that starts to move. Therefore, in order to better understand the circulating system functioning in China, it is necessary first to discuss the seasonal pressure distribution of the sea level in the Asia-Pacific region which is the driving force of China's air current. Most notably, the maximum difference in atmospheric pressure occurs between winter and summer, and January and July can be regarded as a typical month.

Walker cycle is caused by the pressure gradient force generated by the East Pacific high pressure system and the Indonesian low pressure system. Walker's circulation in the tropical Indian, Pacific and Atlantic basins brought the west west surface of the first basin and the east winds of the second and third basin. As a result, the temperature structure of the three oceans showed considerable asymmetry. The equatorial Pacific and Atlantic surface temperatures are lower in the northern part of the eastern summer and lower surface temperatures are dominant only in western India. These changes in the surface temperature reflect the change in the thermocline depth

A wide range of subtropical high pressure exceeding 1,025 hPa is located in the western North Pacific in the eastern part of the Chinese coastal area. Because of these two strong pressure systems, the summer China surface wind distribution is characterized by the eastern south wind and the northwest easterly wind. Compared to the high pressure of Mongolia in winter, the low temperature in July is very thick. At 500 hPa level, low voltage batteries still exist. This is the highest reachable level. Even the surface wind on the Tibetan Plateau in Western China is affected by summer heat.

In winter, January experienced the strongest anti cyclone pressure field; in the summer, the cycle of China is mainly low temperature in India - Pakistan area. The long-term record indicates that the period from June to September includes a summer model represented by July. The winter circulation mode is included from October to May and is represented in January. (Zhang, 1992) We conclude that the wind that spreads in most parts of China flows out from the north, northwest and northeast in the winter, from southwest to south in the summer, and southwards to the east be able to. The apparent seasonal fluctuation (over 120 °) of this wind direction is often defined as "monsoon" including various amounts of air due to the seasonal fluctuation of the thermal structure of the surface of the lower layer, and weather and climate are greatly influenced I will do it. Related fields