What is this? Drought pole and rain pole

In some parts of the world, there is no rain all year round, while in some places it rains every day. One is "drought pole" and the other is "rain pole".

Ruoqiang, southeast of Taklimakan Desert in Tarim Basin, China, has an annual precipitation of only 5mm. This place is surrounded by mountains, far from the ocean, and it is difficult for humid air to reach. It is the place with the least rainfall in China.

In the middle of sub-Saharan Africa, there is no rain for several years, the sun is shining and the air is dry, so it is called the "desert" in the desert. Sometimes, it rains in the sky, but it falls in the air and is evaporated, becoming "dry rain".

The dry harff Valley in Africa has not rained for 89 years.

The coastal areas of Peru and Chile in South America are located in the leeward area of mountains and controlled by subtropical high because of the influence of cold current and cold water flowing from deep sea, so the average annual precipitation is less than 3 mm, and it is common that it does not rain for years.

Iquique, a city near the Atacama desert in Chile, is near the Pacific Ocean, and it hasn't rained for 10 years. The amount of water flowing out of the Andes is also very limited. It disappeared in the desert as soon as it came out of the mountain, and people could only carry snow from the mountain to supply domestic water. Atacama Desert is the driest place in the world and is called the "drought pole" of the world. By 197 1 year, it had not rained for more than 400 years.

There are also "cities that never rain" and cities that hardly rain. Lima, Peru, with an annual rainfall of 37mm and Mao Mao rain, is called "Garuya". This kind of rain can only make the earth a little wetter. 65438+April 0949. There was a real rain in Lima, which lasted 1 hour. People spent this "disaster" in panic-because the roofs of all houses are only used to keep out the sun and rain.

The global precipitation distribution is uneven, and it rains a lot in some places, even every day. The average annual rainfall of Baraoka in the Yarlung Zangbo River basin of China is 4,500mm. Huoshaoliao in the north of Taiwan Province Province is the place with the most rainfall in China, with an average annual rainfall of 6,500mm. 19 12 has a record of 8408 mm, which is called "rain pole" in China.

Why is there so much rain in the fire burning area? Summer is influenced by southeast and southwest monsoon and typhoon, and winter is influenced by northeast monsoon and trade wind. Coupled with the influence of mountains, the airflow rises and it is easy to condense clouds and sow rain.

The place with the highest absolute rainfall in the world is Kilapanchi in yabang, Megara, northeastern India, with an average annual rainfall of 1 1430mm. From August 1960 to July 196 1, the highest record of 2646 1.2 mm appeared, making it the "rain pole" in the world. The downpour is like a waterfall and the raindrops are like baseball, so the locals always wear dustpan-shaped rain gear made of bamboo or grass to avoid being injured by raindrops.

The northern slope of the eastern mountainous area of Viale, Kauai Island in the Hawaiian Islands, is known as the "rain pole" of the world. From 1920 to 1972, the average annual rainfall is 1 1458 mm, and there are about 325 rainy days every year.

Why are these two places rainy? It turns out that they are all blocked by mountains, and the monsoon or easterly wind blowing from the ocean is blocked by mountains, forcing the airflow full of water vapor to rise and condensing a lot of topographic precipitation.

In some places, the annual precipitation is not large, but it often rains. In Bachillat Felix in southern Chile, it rains an average of 325 days a year. 196 1 year, only 17 days without rain. Located in the westerly belt, a large amount of water vapor brought from the Pacific Ocean for many years was lifted by the terrain, forming rainy weather.

In Barra, Brazil, it rains several times every day, and it rains at a fixed time every day. The city of Bala is close to the equator, with a seaside and sunny days. In the morning, the temperature is low, the water vapor content in the air is low, and the weather is fine. Since then, the sea surface temperature has gradually increased, and the hot and humid air has been rising, condensing into clouds in the air and sowing rain. After the rain clears, the air temperature in the lower layer drops, and the sun continues to shine, so it cycles back and forth and changes regularly. Therefore, local people talk about time not with clocks, but with rain. They didn't say when it was, but when it rained.