Which parts of China are tropical? What are the climatic characteristics of the tropics?

South Taiwan Province, Guangdong, Hainan and Yunnan in China belong to the tropics. The English name of the Tropics is tropics. The height of the sun in this area is high all year round. In the vast area between the two tropics, there are direct sunlight twice a year. In the tropics, there is direct sunlight once a year. Moreover, the height of the sun is relatively high at noon all the year round, with little change. ? So this area can get strong sunshine all year round and the climate is hot, so it is called the tropics.

At the equator, day and night are equal in length in a year. From the equator to the tropic of cancer, the change of the length of day and night gradually increases. On the Tropic of Cancer, the difference between the longest day and the shortest day is 2 hours and 50 minutes. It can be seen that the latitude difference of astronomical phenomena in tropical areas is very small. Tropical region is characterized by high temperature all year round, with little change, only relatively hot season and cool season or rainy season and dry season. The annual temperature is higher than 16 degrees Celsius.

Subtropical zone: China's subtropical zone is located in a vast area (22°-34° N, 98 E) south of Qinling Mountains and Huaihe River, north of Leizhou Peninsula and east of Hengduan Mountains. Covering 16 provinces and cities (including Taiwan Province province), the area is about 2.4× 106 square kilometers, accounting for about14 of the national land area. It accounts for half of the country's total population.

In temperate zone, the cold temperate zone only accounts for 1.2% of the total land area. The climate in most parts of the Qinghai-Tibet Plateau is extremely cold, accounting for 26.7% of the country's total land area, and the rest accounts for 72. 1% of the country's total land area, belonging to middle temperate zone, warm temperate zone, subtropical zone and tropical zone. Therefore, China is dominated by a warm climate.

What are the climatic characteristics of the tropics?

The most remarkable feature of tropical climate is that the annual temperature is relatively high, the annual average temperature is higher than 16 degrees Celsius, the boundaries of the four seasons are not obvious, and the daily variation is greater than the annual variation. Due to the difference between surface and precipitation, tropical climate shows different characteristics, such as relatively hot season and cool season or rainy season and dry season.

Broadly speaking, equatorial climate can also be classified as tropical climate. Equatorial climate refers to the climate within 5- 10 degrees on both sides of the equator. The annual average precipitation is 1000-3000mm, and the precipitation distribution is relatively uniform. ? 25-28℃, high humidity, little annual change in meteorological elements. Near the equator, it is hot and humid all year round, with many thunderstorms. During the day, the weather changes are often monotonous and regular. In the morning, it's sunny and cool. Near noon, the cumulus clouds in the sky developed strongly and became thicker and thicker. At one or two o'clock in the afternoon, the sky was overcast, thunder rumbled and the rain poured down. The rain may last until dusk. It was a little cold after the rain, but it became sultry after sunrise the next day.

Although it is very hot here, the average temperature in the hottest month is not too high. The absolute maximum temperature rarely exceeds 38℃, and the minimum temperature rarely falls below 18℃.

The Congo river basin and the Gulf of Guinea in Africa, the Amazon river basin in South America and the Indonesian archipelago belong to the equatorial climate.

In tropical desert areas, the climate is very different. The Sahara desert in northern Africa, the Arabian desert in western Asia, and the great desert in central Australia are dry all the year round, and the temperature changes dramatically, with a daily change range of more than 50℃.

Leizhou Peninsula in China, Hainan Island, the southern lowlands of Yunnan Province and the southern lowlands of Taiwan Province Province are all controlled by tropical climate, with no frost and snow all year round, lush tropical jungles and no cold winter all year round.

The cool maritime climate in summer and the hot and rainy weather in tropical areas create extremely favorable conditions for the growth and reproduction of animals and plants. Many precious animals and plants are produced in tropical climate. The vast tropical rain forest is a huge green factory, which can not only produce oxygen, but also absorb carbon dioxide. It plays a very important role in regulating the contents of oxygen and carbon dioxide in the global atmosphere.