An evasive airwave was detected during the eruption of the Tonga volcano

Satellite image of the volcanic eruption in Tonga, 2022. (Image Source: NASA Worldview, NOAA/NESDIS/STAR)

The catastrophic eruption of the Hongga Tonga-Hong . volcano Pregnancy A volcano in 2022 triggered a special wave of atmosphere that has eluded detection for the past 85 years. researchers from University of Hawaii in manuaJapan Agency for Marine Earth Science and Technology.a guarantee), Kyoto University on the latest computer simulation and monitoring data for explore Presence of BCRs waves – fluctuations in air pressure that were postulated in 1937 but have not been proven to occur in nature until now.

The study was published in Journal of Atmospheric Sciences.

An eruption in the South Pacific earlier this year unleashed what was probably the most powerful eruption the world has seen since the famous 1883 eruption of Mount Krakatau in Indonesia. The rapid release of energy triggered pressure waves in the atmosphere that quickly spread around the world.

The atmospheric wave pattern near the eruption was very complex, but thousands of miles away, the turbulence was driven by an isolated wave front traveling horizontally at more than 650 miles per hour as it spread outward. Air pressure disturbances associated with the primary wave front have been clearly seen in thousands of barometer records worldwide.

He said: “The same behavior was observed after the eruption of the Krakatau volcano, and in the early twentieth century the English scientist Horace Lamb developed a physical theory of this wave.” Kevin HamiltonProfessor Emeritus of Atmospheric Sciences at oh thick College of Oceanic and Earth Science and Technology. These motions are now known as Lamb waves. In 1937, the American-Israeli mathematician and geophysicist Chaim Pekeris extended Lamb’s theoretical treatment and concluded that resolving the second wave at a slower horizontal speed would also be possible. Pekeris tried to find evidence for his slower wave in pressure notes after the Krakatau eruption but failed to present a convincing case.”

Wave identification successfully

Scientists have applied a wide range of tools now available including geostationary satellite observations, computer simulations and high-density air pressure monitoring networks to successfully identify the Beccris wave in the atmosphere after the Tonga eruption.

Lead author, Shingo Watanabe, deputy director of the Japan Agency for Marine Earth Science and Technology Research Center for Environmental Modeling, performed a computer simulation of the response to the Tonga eruption.

“When we studied the computer simulating and monitoring the pulsations over the entire Pacific basin, we found that the slower wave front could be seen over large areas and that its characteristics matched those predicted by Pecres nearly a century ago,” Hamilton said.

Watch the animation From the global atmosphere after the eruption of Tonga.

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