What is it? 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".
in ruoqiang, southeast of Taklimakan desert in Tarim basin, China, the annual precipitation is only 5mm. This place is surrounded by high mountains, far from the ocean, and it is difficult for wet air to reach. It is the place with the least rainfall in China.
In the middle of the Sahara Desert in Africa, it doesn't rain for several years, the sun shines brightly and the air is dry, so it is called the "desert" in the desert. Sometimes, it is raining in the sky, but when it falls in the air, it is evaporated and becomes "dry rain".
The dry valley in harff, Africa, has not rained for eight or nine years in a row.
The coastal areas of Peru and Chile in South America are affected by the cold current and the cold water flowing from the deep sea, and they are located in the leeward zone of high mountains and controlled by the subtropical high pressure zone, so the average annual precipitation is less than 3 mm, and it is common that there is no rain in successive years.
Iquique, a city near the Atacama desert in Chile, is near the Pacific Ocean, and it hasn't rained for more than 1 years. The amount of water flowing from the Andes is also very limited. As soon as it leaves the mountain, it disappears in the desert, and people can only carry snow from the mountains to supply domestic water. Atacama Desert is the driest place in the world and is called the "drought pole" of the world. By 1971, it had not rained for more than 4 years.
There are also "cities that never rain" and cities that hardly rain. Lima, Peru, the annual rainfall is 37 mm, and it is a drizzle, called "Garuya". This kind of rain can only make the earth slightly wet. April 1949. There was a real rain in Lima, and for a full hour, people spent this "disaster" in panic-because the roofs of all houses were only used to shelter from the sun, not rain.
The distribution of precipitation in the world is uneven, and it rains a lot in some places, even every day. Balaoka in the Yarlung Zangbo River Valley in China has an average annual rainfall of 4,5mm. Huoshaoliao in the north of Taiwan Province is the place with the most rainfall in China, with an average annual rainfall of 6,5mm. In 1912, there was a record of 848 mm, which was called the "rain pole" in China.
why is it that there is so much rain in the burning fire? It is influenced by the southeast and southwest monsoon and typhoon in summer, and the northeast monsoon and trade wind in winter. 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 Kilapangqi in yabang, Megara, northeastern India, with an average annual rainfall of 11,43mm. From August 196 to July 1961, the highest record of 26,461.2 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 a dustpan-shaped rain gear made of bamboo or grass to avoid being injured by raindrops.
The northern slope of the eastern mountain of Viale on Kauai Island in the Hawaiian Islands is known as the "rain pole" of the world. From 192 to 1972, the average annual rainfall was 11,458 mm, and there were about 325 rainy days every year.
why are these two places rainy? It turns out that they all have mountain barriers, and the monsoon or easterly wind blowing from the ocean is blocked by the mountains, which forces the airflow full of water vapor to rise and condenses a lot of orographic precipitation.
in some places, the annual precipitation is small, but it often rains. In Bachillat Felix, southern Chile, it rains for an average of 325 days every year. In 1961, it didn't rain for only 17 days. It is located in the westerly belt, and a large amount of water vapor brought from the Pacific Ocean for many years is uplifted by the terrain, forming rainy weather.
It rains several times a day in Barra, Brazil, and it rains at a fixed time every day. The city of Bala is close to the equator, with seashore and bright sunshine. In the morning, the temperature is low, the water vapor content in the air is less, and the weather is fine. Since then, the sea surface temperature has gradually increased, and the hot and humid air has been rising, condensing clouds and sowing rain in the air. After the rain clears, the temperature of the lower air drops, and the sun continues to shine, so it changes circularly and regularly. Therefore, local people talk about time not with clocks, but with rain. They didn't say what time it was, but what time it rained.