Blair. How much can the temperature drop during a total solar eclipse?

Sky watchers observed a partial solar eclipse during the total solar eclipse on August 2 1 2065438 (photo copyright Pablo Blazquez Dominguez/Getty Images), and the moon will completely cover the solar disc from Oregon to South Carolina. During this "total solar eclipse", eclipse observers may feel that the temperature drops suddenly. How much did Mercury fall in this celestial activity? 1834 65438+in the total solar eclipse on February 9,

According to Gettysburg and the Standard, in some places, the total solar eclipse caused the temperature to drop from 78 degrees Fahrenheit to 50 degrees Fahrenheit (25 degrees Celsius to 10 degrees Celsius), a drop of as much as 28 degrees Fahrenheit. On March 20 15, a total solar eclipse occurred in Svalbard, Norway, and the temperature dropped from 8 degrees Fahrenheit to minus 7 degrees Fahrenheit (minus 13 degrees Celsius to minus 2 1 degrees Celsius).

The temperature changes during the total solar eclipse will vary according to the place and time of the year. The temperature change caused by the loss of light in the solar disc will be similar to the difference between the temperature at noon and the temperature after sunset, but this change will happen more suddenly, which is why this is often one of the most significant effects of total solar eclipse. [What will you see during the 20 17 total solar eclipse]

Rick Feinberg, director of media relations at the American Astronomical Society, said that people can expect the average decline of the total solar eclipse to be about 10 degrees Fahrenheit (about 5 degrees Celsius).

There are written records about the total solar eclipse thousands of years ago. However, according to Jay, an astronomer who studies total solar eclipse at Williams College? Jay Pasachoff said that there seems to be no long-term and consistent efforts to measure many local effects of the total solar eclipse, such as the temperature drop on August 2065438+August 2 1 day in 2007. (Ernie Wright/NASA/Goddard /SVS)

Pasachev and his colleague Marcos Pei? Aloza Murillo is making standardized measurements of many local effects of total solar eclipse. They first published an article on this topic in the Philosophical Transactions of the Royal Society of London published on August 22nd, 20 16, reporting the temperature changes in Svalbard in 20 15 years. The whole issue of this magazine is devoted to "solar eclipse weather" or studying various atmospheric effects during the total solar eclipse. The two researchers will take more measurements during the total solar eclipse on August 2 1 2065438. They are from Salem, Oregon.

Pasachev and Pena Aloza murillo measured the temperature at a height of about 5 feet (1.5 meters) above the ground, and found that the lowest temperature during the day appeared 2 minutes after the total solar eclipse. This may be because most of the energy of the sun can't directly heat the air. The earth's atmosphere is a good insulator, which means it is not easy to exchange heat. Most of the energy of the sun warms the ground and then gradually warms the air; Warm air rises and cold air settles on the ground, forming a heat convection cycle. This delayed heat transfer can explain the slight delay of air cooling during the total solar eclipse.

The total solar eclipse occurs once every 18 months on average, but it is only visible in narrow areas. The total solar eclipse on August 2 1 day will be visible on a 70-mile-wide path across the continental United States. The so-called "eclipse hunters" often go to remote areas of the earth to watch these cosmic events. This means that Pasachev and Penialoza murillo may need many years to collect "eclipse weather" data from a large number of total solar eclipses.

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