Why didn't the rainstorm in Taklimakan desert form an oasis?

The main reasons for the formation of Taklimakan desert are dry climate and scarce rainfall, which makes the land desertification. As a result, some netizens began to open their minds. If there is heavy rain in Taklimakan desert, can the desert form an oasis?

In fact, this problem happened to us this year.

Heavy Rain in Taklimakan Desert This year, heavy rain occurred in China, causing floods in many places. In fact, this year, not only the southern region is facing floods, but also the northwest region is facing heavy rains, which has also brought floods to the northwest region.

According to the high-definition satellite Fengyun-4, in April this year, a layer of precipitation cloud appeared over the northwest of China. This kind of cloud is very rare in the sunny and dry northwest, and what is even more rare is that there are many clouds over the Taklimakan desert.

Although the cloud is not very big, it produces a lot of rainfall. Kashgar even has a rainfall of 1 hour of 42.5 mm, and the standard of rainstorm is that the rainfall in 24 hours exceeds 50 mm, which means that the rainfall in Kashgar for 3 hours exceeds the standard of rainstorm. If this rain lasts for 24 hours, the precipitation will exceed that of the coastal city of Shanghai in one year.

Such a heavy rainfall will certainly alleviate the drought in northwest China, especially the Taklimakan desert, because water shortage has become a desert.

But it turns out that the rainstorm not only did not change the local desert form, but also brought geological disasters to the local area.

First of all, we should know that the soil in desert area is different from the soil we often see, because it has poor drainage ability and poor water-fixing ability. Short-term rainstorm will not only increase the local soil water content, but also lead to soil erosion and flood disaster due to excessive water.

When the rainstorm stops, because the desert is mainly composed of gravel, the specific heat capacity of gravel is small, and the temperature will rise after direct sunlight, resulting in extremely high local surface temperature, and the moisture in the soil will quickly evaporate to the upper air, so that the water vapor can be used by animals and plants after disappearing, so a short period of rainstorm will not turn the desert area into an oasis.

However, if the desert area is hit by heavy rain for a long time, it is not good for human beings. First of all, the reason for the drought and lack of rain in desert areas is the geological changes of the earth. If the desert area changes from dry to wet and rainy climate in a short time, it must be a catastrophe on the earth, leading to abnormal changes in water vapor.

In addition, the water vapor on the earth is conserved. If all the rainfall falls in desert areas, other areas will suffer from drought, which will bring serious disasters to other areas.

In fact, the fire in Australia and the locust plague in East Africa last year were all related to the sudden increase of heavy rain in the desert.

Indian Ocean Dipole Indian Ocean Dipole refers to the difference between the temperature on the west side and the temperature on the east side of the Indian Ocean. If the temperature difference between the two sides is not much, it is the neutral dipole of the Indian Ocean at this time. If the temperature on the west side of the Indian Ocean is significantly higher than the east pole, the positive dipole of the Indian Ocean will be triggered at this time. On the contrary, it is the Indian Ocean negative dipole.

The west side of the Indian Ocean refers to the waters near East Africa, and the east side refers to the waters near Australia. Last year, the temperature on the west side of the Indian Ocean was significantly higher than that on the east side, which triggered the positive dipole of the Indian Ocean.

The appearance of positive dipole in Indian Ocean increases rainfall in desert areas of East Africa, and locusts in desert areas of East Africa need to lay eggs in moist soil. In the past, due to the dry climate in desert areas, the survival rate of desert locusts was not high, and the increase of water made their number surge, which led to flooding and threatened the food security of most countries in the world.

On the other hand, the appearance of positive dipole in the Indian Ocean reduces the precipitation in Australia, making the climate here dry, so that forest fires persist for a long time, which has a great impact on the local and global environment.

The ancients in China used to say? If something happens, there must be a demon, okay? From the above, the sudden increase of desert rainstorm is not a happy thing, but a meteorological disaster that should be paid attention to.

The formation of Taklimakan desert is related to its inland and surrounding topography. In the south, there are mountains such as Qinghai-Tibet Plateau and Kunlun Mountain that block the water vapor in the Indian Ocean, and in the east, there are mountains such as Qinling Mountain and Altun Mountain. Northwest China is blocked by Tianshan Mountain and Altai Mountain, and it is difficult for water vapor to enter here, so it will form a desert.

Its geographical location determines that there is little rainfall here. Even if there is occasional local rainstorm, it will not change the local climate. Only when the global climate is abnormal and the plate has undergone major changes will the climate change, but these changes are not good for all mankind.