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The scourge of human intervention in nature: from melting Arctic ice to wildfires in the American West

بلای دخالت بشر در طبیعت: از ذوب یخ‌های شمالگان تا آتش‌سوزی در جنگل‌های غرب آمریکا

A team of researchers led by Hailong Wang, an earth scientist at the National Pacific Laboratory in Washington, D.C., has found that favorable summer fires, linked to the Arctic ice sheet, could trigger forest fires in the fall. The West will increase the United States.

They analyzed data on decades of forest fires, sea ice cover and weather conditions to identify the relationship between North Sea ice reduction and forest fire risk.

Scientists call this connection “teleconnection”.

Teleconnection is not a new concept and can be attributed to the “butterfly effect” – a term coined by meteorologist Edward Lorenz in the 1960s to describe the theory of turbulence.

This concept can be summarized as follows: If a butterfly flies at one point, it can move enough air to create a large storm elsewhere on Earth.

Due to the extensive connections that exist in the Earth system, especially in the atmosphere, a small change in one region can affect other regions through atmospheric currents.

Due to the high coherence and complexity of the Earth’s atmospheric system, a small perturbation at one point can lead to a larger perturbation at another point; A phenomenon known as the “butterfly effect”.

Previously, links between sea ice reduction and incendiary climate have been identified. Wang says those findings relied heavily on statistical relationships.

For example, scientists have found that the Arctic Sea ice may have been shrinking for years, and they have also identified a sharp increase in fire-causing climate in the western United States.

They could only identify this connection, but there was no mechanism to explain which was the cause and which was the effect.

Wang and his colleagues went one step further than these statistical relationships. The team combined the findings with one of the most up-to-date climate models capable of predicting forest fires.

In this way, they were able to identify the reaction of the climate system, including the flammable climate in the western United States, and other reactions to changes in the ice cover of the North Sea.

What they found was the “story of two tornadoes.”

Forest fires and melting ice
Melting ice in the north causes a counterclockwise L. The tornado creates a current that forms the second Hurricane H in the western United States. This tornado creates favorable conditions for forest fires.

As ice cover decreases further in summer, the ocean can absorb much more heat from sunlight. Also, less ice cover in the North will increase the heat released from the ocean in the fall and early winter. Because ice cover can act as an insulator between the heat of the ocean and the air.

Abnormal heat from the north can cause air to rise from the surface, and this system reinforces the low pressure. This is one of the tornadoes that has a counterclockwise direction.

When this low pressure system moves south, it diverts the polar jet from its normal path, causing a second tornado.

This shift will facilitate the formation of a high-pressure system over the United States.

The high pressure system rotates clockwise. This causes hot, dry air to fall to the ground from above the atmosphere. This is usually accompanied by clear skies and no rain, and creates favorable conditions for forest fires.

These findings in the journal Nature Communication Printed. Wang says forest fires are probably not the only result of declining sea ice.

Glacier 2021 Texas Climate Change
Scientists expect future research to find more links between the melting of Arctic ice and devastating weather events, such as the 2021 Texas Glacier.

Northern changes can also be linked to very cold weather.

Like the famous Texas ice and storm of 2021, which cut off electricity to millions and caused billions of dollars in damage. The search for more telecommunications is the subject of his future research, Wang says.

“Next we want to find more connections between climate change in the Northeast, extreme weather and climate change across the globe,” he said.

If forest fires and sea ice are climatically intertwined, surely other climatic wonders await to be discovered.

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