The outline of Hainan Island is like an oval Sydney, with low terrain around and high in the middle. It is a dome-shaped mountainous terrain, with Wuzhishan and Ying Ge Ridge as the uplift core and descending to the periphery step by step, and it is composed of mountains, hills, terraces, plains and other landforms. Hainan has a tropical maritime monsoon climate, which is warm and hot all year round with abundant rainfall.
Extended data:
I. Location and background
Hainan Province is located at the southernmost tip of China, bounded by Qiongzhou Strait in the north, facing Vietnam across the sea in the Beibu Gulf in the west, facing Taiwan Province Province in the South China Sea in the east, and bordering the Philippines, Brunei and Malaysia in the South China Sea in the southeast and south.
The geographical location of Hainan Island is between10837 ′-1103 ′ and1810 ′-2010 ′. The outline of the island looks like an oval Sydney. It is about180km wide from northwest to southeast.
The geographical location of Xisha Islands is15 46'-17 08' in north latitude and111'-12 in east longitude. The geographical location of Nansha Islands is between 3 35 ′-1155 ′ north latitude and109 30 ′-17 50 ′ east longitude. The geographical location of zhongsha islands lies between13 57'-19 33' north latitude and113 02'-18 45' east longitude.
Second, climate.
Hainan Island is located in the northern edge of the tropics and belongs to the tropical monsoon climate. It has always been known as a "natural greenhouse". There is a long summer without winter, the annual average temperature is 22~27℃, the accumulated temperature at 8200℃ is greater than or equal to 10℃, and the coldest January temperature still reaches 17 ~ 24℃.
Annual illumination 1750 ~ 2650 hours, illumination rate of 50% ~ 60%, sufficient light and temperature, and great photosynthetic potential. Hainan Island is an ideal breeding base in South China because of its early spring, rapid temperature rise, large daily temperature difference, frost-free all year round and warm winter.
Hainan province has abundant rainfall, with annual precipitation1000 mm-2,600 mm and average annual precipitation 1639mm, with obvious rainy season and less rainy season.
May ~ 10 is the rainy season every year, and the total precipitation is about 1500mm, accounting for 70 ~ 90% of the total annual precipitation. The main rain sources are frontal rain, thermal thunderstorm and typhoon rain. The rainy season is 1 1 until April of the following year, accounting for only 10 of the annual precipitation.
Baidu Encyclopedia-Hainan