HomeScience & InnovationSlowing subtropical jet between Europe and Asia: Causes & Consequences

Slowing subtropical jet between Europe and Asia: Causes & Consequences

Atmospheric concentrations of fine particles in Asia and Europe differ to the point of disturbing the summer thermal contrast between the north-west and the south-east of the Eurasian continent. However, this influence has very concrete implications, as shown by a study published on March 3 in the scientific journal Nature Communications .

Atmospheric circulation regimes favorable to prolonged heat and drought episodes have increased across the Old Continent and in Central Asia in recent decades. Thus, in addition to the background heating, the large-scale circulation intensifies the summer phenomena on these regions by concentrating the energy in the form of heat domes.

Atmospheric pollution and the weakening of the subtropical jet stream

A team of researchers from the University of Reading (England) found that this change in atmospheric circulation was not strongly linked, as previously assumed, to the decrease in the thermal contrast between the pole and the tropics. following the retreat of the Arctic ice. It would rather find its origin in the atmospheric concentrations of fine particles , also called aerosols, which differ greatly from one geographical area to another.

vent-zonal-subtropical-jets
Evolution of the wind in the Asian subtropical jet zone between 1979 and 2019 according to four data sets. The downward trend is obvious. Credits: B. Dong & coll. 2022 .

Greenhouse gases tends to reinforce this jet

Indeed, since 1979, fine particle pollution has clearly increased in southern and eastern Asia, while it has fallen sharply in Europe. However, this dust has the property of very effectively reflecting incident solar radiation, which has repercussions on the thermal contrasts on the scale of the continent. It is this mechanism which, according to the researchers, is the main factor responsible for the observed evolution.

By weakening the thermal differential between northwest and southeast Eurasia, anthropogenic aerosols weakened the subtropical jet stream by 7% between 1979 and 2019 . This implies more frequent and persistent blocking situations in the hot season, but also means that it is a fairly easily reversible development, in particular when taking into account the fact that the increase in greenhouse gases tends to reinforce this jet.

“  If Southeast Asian countries meet their commitments to reduce their air pollution levels over the next few decades, we would expect to see the jet stream strengthen again over Eurasia. , potentially reducing the likelihood of prolonged heat waves, but increasing the likelihood of severe mid-latitude storms ,” said Buwen Dong, lead author of the study.

What is the jet stream and how does it affect the weather?

Mehmet S. Kaya
Mehmet S. Kayahttps://teknonel.com
Mehmet is one of the administrator of Teknonel. As a software developer, he loves to share his knowledge in related topics. He is highly familiar with the editorial process from the inception of an article idea, through the iterative process, publishing, and performance analysis as well as product reviews.

Follow us on Social Media!

12FansLike
15,848FollowersFollow
13FollowersFollow
676SubscribersSubscribe

Related Articles

Interesting phenomenon of Zen stones on Baikal Lake solved

In winter, Lake Baikal is sometimes the scene of the formation of strange little structures: stones are found in balance on top of small...

Some gut bacteria can extract more energy from food

Why do some people gain weight more easily than others despite eating the same food?According to new research by a team at the University...

Australia’s new concrete additive allows sewer cracks to repair themselves

Underground waterways between cities receive sewage from houses and roads, and are often exposed to corrosive acids, as well as various pressure and temperature...

The Arctic is Warming Four Times Faster and Becoming Stormier

The Arctic is warming faster than expected. Scientists have found that the Arctic has warmed not just twice but four times as fast as...

Explore More Articles

The world's largest electric boat with a capacity of 2,100 people

The world’s largest electric boat with a capacity of 2,100 people

0
Electric vehicles can help reduce carbon emissions, so if ferries that are larger and use more fuel are electrified, can they further reduce carbon...

HDR: Definition, Advantages and Importance

0
HDR stands for "High Dynamic Range". The goal is to translate as well as possible, on a photo or a video, what the human...
Best 144Hz Curved gaming monitors

4 Best 144Hz Curved gaming monitors

0
Gaming monitors are one of the PC components that have been dramatically changed and improved in the recent years.  If the size of the tiles...
Best 300 - 350 Watt Power Supply Units-min

4 Best 300 – 350 Watt Power Supply Units

0
The power supply provides electrical current to all of the computer components. The power supply unit must have sufficient power to supply the various...