The stratospheric steam changes the global temperature

Scientists seem to have missed the impact of stratospheric steam on global temperatures, a new finding suggests that the temperature in the past 10 years has been significantly different from the previous two decades. .

US researchers have discovered that high levels of water vapor in the atmosphere affect global temperatures more than previously thought.

Although the discovery does not change the theory of global warming, it is human but it helps explain why temperature can rise and fall significantly between decades.

Ice melts due to the effects of global warming.Photo: EPA

The study, published in the journal Science, shows that the humidity of the air at a height of about 10 miles (called stratospheric steam) is reduced by 10%, causing global temperatures to remain stable since the year. 2000 so far although CO ₂ has increased significantly in the atmosphere.

Meanwhile, the rise of steam in the 80s and 90s also explains the skyrocketing temperature of these two decades.

Steam has been acknowledged as a serious greenhouse gas as well as CH ₄ and CO ₂ , which absorbs the temperature from the sun, making the planet 'blanketed'. However, much of the weather prediction only focuses on the troposphere vapor in the atmosphere.

Dr. Susan Solomon of the US National Oceanic and Atmospheric Administration said that tropospheric air humidity was well monitored. But we have skipped a thin layer of steam in the stratosphere. This steam layer has caused great effects from decade to decade in the direction that we did not expect.

The stratosphere is the atmosphere at an altitude of 8-30 miles above the soil surface. Steam enters the stratosphere mainly when air rises in the tropics.

Observations from meteorological and satellite balloons show that stratospheric steam increased during the 80s and 90s and decreased after 2000.

Changes occur at high levels in the atmosphere, this is where changes will have the greatest impact on climate.

Scientists tell why the rising and falling steam is still a mystery. However, the study estimates that the steam drop since 2000 has caused the surface temperature to rise only 25%, which is slower than expected.

According to scientists, in the 1990s, it is possible that stratospheric steam has accelerated global warming by 30%.

David Britton of MET Office said the study emphasized the complex nature of meteorology but it does not counter the underlying science that CO2 and emissions from human activity are responsible for warming onions. fine.

Dr. Vicky Pope, head of meteorological science at MET Office also affirmed that even if the stratospheric steam affects the Earth's temperature, it is only a small change compared to the long-term increase in house gas. Man-made glasses.