What is Chinook wind?

When Chinook winds blow over the Rocky Mountains in Banff National Park, Alberta, Canada, they form interesting clouds. Autumn sky photography/studio) In the cold winter east of the Rocky Mountains, sometimes strong, dry and warm winds blow across the earth from the mountains. These winds, called Chinook winds, can bring about rapid temperature changes.

Chinook Wind is named after Chinook Indians who live in the coastal areas of Washington and Oregon near the Columbia River. Winds like Chinook are found all over the world, and there are several place names. Emma Quayle, a British scientist, wrote in an article published in Weather magazine 200 1 that in the Alps of Europe, they are called "Feynne winds". In Central Asia, they are Afghan winds; In the Andes of South America, these winds are called Purch winds; In southern California, they are called Santa Ana wind.

According to Rocky Mountain National Park, the fast-rising Chinook wind is warm and humid air blowing from the Pacific Ocean in northwest North America to the Rocky Mountains. When climbing the mountain, the air mass becomes cold, bringing rain and snow to the mountain peak. The air mass is dry now after releasing water on the mountain, and it will get warmer when moving along the east side of the mountain. The air quality warms rapidly, and finally becomes warmer and drier than the original air quality from the Pacific Ocean. When the wind suddenly turns to the west or southwest, the Chinook wind begins to develop at a rapidly increasing speed. According to the Indiana public media Moment of Science,

The temperature of Chinook wind can be as high as 50 degrees Fahrenheit (10 degrees Celsius). The temperature rises by about 5.5 degrees Fahrenheit per thousand feet, and the air mass goes down the mountain. According to the US Geological Survey, when the wind blows across the plains from the mountains, the gust can reach 80 miles (65,438+028 kilometers) per hour. When warm, dry and fast-moving Chinook winds pass through snow-covered areas,

It usually evaporates before the snow melts. According to meteorologists, the wind can easily evaporate a foot of snow in a few hours. Because of this, Chinook wind is often called "snow eater".

According to the weather in Montenegro, an extreme example of Chinook wind was recorded in South Dakota in 1943+ 10. At 7: 30 in the morning, the recorded temperature was MINUS 4 degrees Fahrenheit (MINUS 20 degrees Celsius). Shortly after the Chinook wind started, the temperature rose by 49 degrees Fahrenheit (7 degrees Celsius) in two minutes. By 9 am, when Chinook died, residents were experiencing 54 degrees Celsius (65,438+02 degrees Celsius). The wind stopped, the temperature dropped to 58 degrees, and it took 27 minutes to return to the morning position.

There are several legends about the origin of Chinook wind in the myth of Chinook wind. In the Indian Legend of the Northern Rocky Mountains, Ella E Clark recorded a story in which Thunderbird punished people who lived in her valley because an careless campfire destroyed all life there. She drove the people in the valley with the cold northeast wind.

However, her daughters, Crow, Magpie and Bluebird, walked with others, and Thunderbird became lonely. So she asked the northeast wind to leave and invited Chinook wind to warm the valley. Life is back, people are back, and Thunderbird's daughter is back. Thunderbird asked Bluebird what she could give her to express her gratitude.

"In the future, dear mother," said Bluebird, "don't be so angry. It is wrong for considerate people to suffer from careless crimes.

Therefore, the northeast wind comes back to Dongguan every winter to remind us to be considerate in life, but when Chinook wind comes back, he always goes home and stays in spring.

Another story, myths and legends from North America, was recorded by Catherine Berry Judson, involving two brothers, Fox and according to the author,

sudden-infant-death-syndrome

The study was published in 1999 by pediatricians and researchers from New Zealand, Messi, Schlueter and Ford in the British Medical Journal. Their research focuses on sudden infant death syndrome (SIDS) and wind in New Zealand. They relate their research to different parts of the world that experience similar wind phenomena, such as Chinook wind in the United States and Canada. Researchers have observed for 22 years that there are 646 known cases of small island developing States in Christchurch. The author concludes that although there is evidence that small island developing States may be related to several environmental factors, fern wind does not seem to be an additional reason.

Additional resources

Acuweather: Snoweater: What is Chinook wind? Weather in Montenegro: Destroyer NOAA Snow Wind: This month in the climate history: 1982 65438+ 10 destructive Chinook wind.