Bor state weather

The plane may have to fly higher to avoid bumps.

Since 1980, the lowest part of the earth's atmosphere has been rising at a rate of 50 meters every decade.

A new study shows that the earth's atmosphere is rising because of climate change.

According to the research results of165438+/kloc-0 published in the journal of scientific progress on October 5th, the meteorological balloon measurements in the northern hemisphere in recent 40 years show that the troposphere, the lowest layer of the earth's atmosphere, has been expanding upward at a speed of about 50 meters every decade, and climate change is the reason.

Bill Randall, a scientist at the National Center for Atmospheric Research in Boulder, Colorado, said: "This is a clear sign that the atmospheric structure has changed."

"In addition to all other evidence of climate change, these results also provide independent evidence that greenhouse gases are changing our atmosphere."

The troposphere is the atmosphere in which we live and breathe.

It extends from sea level to 7 kilometers above the poles and 20 kilometers above the tropics.

As the layer with the highest heat and moisture content in the atmosphere, it is also a frequent place for atmospheric weather.

The air in the atmosphere will expand when it is hot and contract when it is cold, so the upper boundary of the troposphere, that is, the tropopause, will naturally contract and expand with the change of seasons.

However, by analyzing atmospheric data such as pressure, temperature and humidity from 20 degrees to 80 degrees north latitude and matching them with GPS data, the researchers found that with the increase of greenhouse gases, there is more and more heat in the atmosphere, and the tropopause rises faster than ever before.

More importantly, the rate of increase seems to be increasing.

According to this study, from 1980 to 2000, the tropopause will rise by about 50 meters every ten years, and from 200/kloc-0 to 2020, this increase will rise to 53.3 meters every ten years.

Considering the natural events in their study area, such as two volcanic eruptions in the 1980s and periodic warming El Ni? o in the Pacific Ocean in the late 1990s, researchers estimate that human activities still account for 80% of the total increase in atmospheric height.

Climate change is not the only man-made factor that causes the tropopause to rise.

Due to the release of ozone-depleting gases in the past, the stratosphere (the layer above the troposphere) is also shrinking.

These gases shrink the stratosphere by destroying the stratospheric ozone layer, although the restrictions on their emissions in recent years have led to a decrease in the concentration of these gases in the atmosphere.

Scientists are still uncertain about how the rise of the tropopause will affect the climate or weather, although it may force planes to fly higher in the atmosphere to avoid turbulence.

Randall said: "This study captures two important ways for human beings to change the atmosphere."

"Although society has successfully stabilized the stratosphere by limiting chemicals that destroy ozone, the height of the tropopause is increasingly affected by greenhouse gas emissions."