What are the climatic characteristics of tropical deserts?

Tropical desert climate has many characteristics, such as sunny days, strong sunshine, dryness, hot summer, large temperature difference between day and night, and many sandstorms.

The key is "doing". Because it is dry, there is less rain, more sunshine and strong sunshine; Because it is dry, there is no cloud in the sky, so it can't stop some sunshine, and there is no water on the ground, so it can't evaporate and cool down. All the heat from the sun on the ground is used to heat the earth and the air, so the temperature in summer is particularly high, and the temperature difference between day and night is particularly large. Because of the dry weather, there are few plants on the ground. When there is wind, it will blow sand.

The high temperature on the desert surface makes the temperature difference between the upper and lower atmosphere close to the ground extremely large. However, the temperature distribution of cold air layer and hot air layer can reflect the distant scenery in front of travelers, which is called a mirage in meteorology, commonly known as a mirage. Therefore, travelers in the desert often see a blue lake in front of them. In fact, it is the reflection of the distant sky that makes them happy. On the black asphalt pavement in summer afternoon, you can often see a piece of blue water on the road ahead. When you take a closer look, it disappears and moves to the front. This is also a mirage scam on the road.

The four seasons in the desert are also very different from other places at the same latitude. In the east of China, the spring and autumn seasons are very short because of the monsoon climate. However, in desert areas, spring and autumn are shorter. Because the desert area is too dry, there is no water regulation. The temperature rises in a straight line in spring and falls in autumn. The sum of spring and autumn is only about two and a half months to three months.

Spring and autumn are short, and winter and summer are particularly long, so some people describe it as: "In the arid areas of Central Asia, there are only two seasons in a year: winter in Siberia and summer in the Sahara." There is some truth in this statement. The temperature change of desert climate is the most extreme among all kinds of climate in the world. Specifically, the tropical desert climate zone has the following climatic characteristics:

The climatic characteristics of tropical desert can be summarized as follows: dry and hot all year round, especially in hot season.

Extended data:

The tropical desert climate is mainly distributed in the mainland or the west coast of the mainland near the Tropic of Cancer, mainly in the narrow areas of North Africa, West Asia, central and western Australia and western South America, generally in the mainland and west coast near the Tropic of Cancer. Take North Africa, Arabian Peninsula in Asia and desert areas in Australia as typical examples.

It is characterized by high annual average temperature, large annual temperature difference, large daily temperature difference and scarce precipitation. The annual precipitation is generally below 250 mm, and in many areas it is only tens or even several millimeters. Precipitation varies greatly, and it often doesn't rain for several years.

Tropical desert (dry) climate is generally distributed in the mainland and west coast controlled by the north-south regression high pressure belt, with desert areas in North Africa, Arabian Peninsula in Asia and Australia as typical examples. Controlled by subtropical high pressure zone or trade wind zone, it is controlled by tropical continental air mass all the year round, with drought and little rain. The annual precipitation is about 100mm, and in some places it is only a few tens of mm, with plenty of sunshine and high temperature. The average temperature in the hottest month can reach about 30℃.

The contradiction between heat and water is prominent. The distribution and formation of the world's great deserts are closely related to the tropical dry climate. The natural vegetation is desert. Sahara Desert in Africa, kalahari desert, Arabian Desert in Southwest Asia, thar desert, deserts in western and central Australia, deserts in the lower reaches of Colorado and California in North America and Atacama Desert in South America all have typical tropical desert climates. The tropical desert climate zone is on the north and south sides of the tropical grassland climate zone.

Baidu Encyclopedia-Tropical Desert Climate