The difference between sand and desert.

The difference between sandy land and desert is as follows:

The area of ??sandy land and desert is incomparable. The areas are large and small, so there is no way to compare them. And desert is a type of sandy land. In terms of texture, both are composed of a large amount of sand.

Sandy land refers to land covered by sand on the surface and basically without vegetation, including deserts, excluding beaches in river systems.

Sand pictures:

Desert mainly refers to a barren area where the ground is completely covered by sand, where there are very few plants, little rain, and dry air. The desert is also called a "sand curtain", an area with drought, water shortage and few plants.

Desert pictures:

Extended information:

Characteristics of desert climate:

(1), low precipitation and high variability :

Aswan in the Sahara Desert of North Africa once had no rain for many years; while Arica in the desert of northern Chile in South America had only three measurable showers in seventeen consecutive years. , while the total amount of the three times is only 0.51 mm, and the precipitation is very little.

Iquiguey, also located in the desert of northern Chile, had no rain for four consecutive years. However, a shower in the fifth year dropped 15 mm. In another year, a shower recorded a rainfall of 63.5 mm. , showing the large variability.

Rainfalls in tropical deserts are mostly explosive showers, which often cause severe soil erosion.

(2) High temperature and large temperature difference:

Due to low cloud cover, strong sunshine, lack of vegetation coverage, and low air humidity, the temperature rises very quickly during the day. There has been a record of as high as 58℃ in North Africa. Generally speaking, the monthly average temperature in summer is between 30℃~35℃, and the high temperature lasts for a long time.

For example, in Aden on the Arabian Peninsula, the average monthly temperature is above 30°C for five months of the year. The desert is cooler at night because there are no clouds all night long, the ground radiation is strong, and heat dissipates quickly. The lowest temperature at night is generally between 7°C and 12°C, and there are also days with thin frost.

(3) Strong evaporation and low relative humidity:

The tropical desert climate is often cloudless, windy, sunny, high in temperature, and low in relative humidity, so the evaporation power is very high. exuberant. It is possible that evapotranspiration is more than twenty times, or even a hundred times, that of precipitation. The relative humidity in the air is very small, with a relative humidity of about 2% often found in the Egyptian Sahara Desert.

Reference: Baidu Encyclopedia-Sand

Reference: Baidu Encyclopedia-Desert