Importance of geographical location in the South China Sea

The geographical location of the South China Sea and the South China Sea Islands is very important. Tropical natural scenery is very beautiful and rich in resources, which is an inseparable part of China's sacred territory.

The South China Sea is located in the low latitude area south of latitude 23 37 ′, reaching the Tropic of Cancer in the north, crossing the equator in the south and entering the southern hemisphere, with latitude 26 47 ′? , located between South Sumatra and Kalimantan, China, Guangdong, Guangxi, Fujian, Hongkong and Macau in the north, Taiwan Province Island in the northeast, Philippine Islands in the east, and including the western half of Luzon Strait, Vietnam and Malay Peninsula in the southwest, connecting the Pacific Ocean and the Indian Ocean through bashi channel, Sulu Sea and Malacca Strait.

The main rivers flowing into the South China Sea are the Pearl River, the Han River, the Red River, the Mekong River and the Chao Phraya River in Indo-China Peninsula, and the neighboring countries (regions) of the South China Sea are Taiwan Province Province, the Philippines, Malaysia, Brunei, Indonesia, Singapore, Thailand, Cambodia, Vietnam and China (Mainland China) from north to clockwise.

The South China Sea Basin is a faulted basin, with a northeast-southwest fault zone in the middle, which extends eastward and westward in geological history, forming a deep-sea basin.

In the process of basin expansion, the remaining land fragments become submarine highlands or sink into the trough, during which fractures occur, become lava highlands accumulated by submarine volcanic eruption, and form pinnacles exposed to the sea. The South China Sea Basin has formed a series of submarine landforms in which the northeast-southwest uplift highlands and deep troughs are alternately arranged.

Extended data:

The South China Sea is located in the tropical and subtropical areas in the southern part of the Asian continent. Compared with other sea areas, it is characterized by a remarkable tropical maritime climate, short spring and autumn, long summer, no ice and snow in winter, mild seasons, humid air and abundant rainfall. Especially in the south-central sea area, it is hot and humid all the year round, with no long summer and no long winter, and little seasonal change. In the southwest of zhongsha islands, the annual average temperature is around 26℃. The monthly average minimum temperature in Xisha is 22.8℃(65438+ 10), and that in Nansha is 25℃(65438+ 10).

The monthly average maximum temperature appears in May and June in Xisha and April and May in Nansha. The annual temperature is only 6 ~ 8 degrees Celsius, while the annual temperature at sea is even lower. The northern coastal areas and islands have great seasonal changes. The annual temperature is above 10℃, and it is hot and rainy in summer. The early winter is relatively dry and cold, and it is often cold and rainy in the later period.

The diurnal variation of pressure in the South China Sea is regular, with the highest pressure at 10 and 22: 00 local time, and the lowest pressure at 04: 00 and 16, with a daily range of 3 ~ 4 mbar. The main airflow in the lower layer of the South China Sea is the northeast monsoon airflow in winter, the southwest monsoon airflow in summer and the northeast trade wind airflow. ?

The northeast monsoon airflow in the South China Sea is formed by the gradual turning of the airflow blowing to the sea surface along the edge of Mongolia cold high pressure. Gradually from north to south. It takes 10 ~ 15 days to interrupt one cycle from enhancement to attenuation. During the northeast monsoon, there are two or three seasonal trends and interruptions every month.

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