September 10, 2024 report

by Bob Yirka , Phys.org

A team of climate, health and atmospheric specialists in Spain and Japan has found abundant live fungi, bacteria and viruses high in the Earth's atmosphere. In their study published in the Proceedings of the National Academy of Sciences, the group collected air samples from altitudes of 1,000-3,000 meters.

Prior research has shown that dust can travel thousands of miles in the atmosphere -- large amounts of dust from Africa are carried to both North and South America, for example. Prior research has also shown that microbes that attach to dust can be carried equally far.

For this new study, the researchers wondered how high in the atmosphere microbes might be found and whether they could survive the trip. To learn more, they chartered a small plane that carried them aloft over parts of Japan, where they collected air samples at altitudes of 1,000-3,000 meters near the planetary boundary. They also gathered weather data related to the air column in areas where they had flown.

In an air-controlled lab, they conducted a DNA analysis on the microbes found in the samples as a way to identify what they were and also which types. They found examples of fungi, bacteria and viruses, many of which, the team noted, are hazardous to human health.

More:

https://phys.org/news/2024-09-fungi-bacteria-viruses-high-earth.html