Many people view a river in a very visual way.
They have banks, moving water, and an obvious pathway through the land.
But one river fits none of these descriptions. Instead of moving through the ground or along the surface of the earth, this massive river exists above ground.
It flows thousands of miles across the top of South America with enormous volumes of water but no visible flow channel.
Why is the world’s largest river completely unseen to the naked eye, and what do scientists warn will happen if it disappears?
The unseen river of the Amazon
The Amazon River basin is known for both the immense volume of rain it receives each year and the size of its rainforests.
However, many of the most significant contributions of water come from unseen water movements.
Scientists recently found evidence of huge rivers of water moving through the air above the Amazon. This movement originates in the Atlantic Ocean and travels west across the Amazon toward the Andes.
As this moist air travels westward, it produces rain showers over the rainforest below.
After receiving rainwater, rainforest plants release water vapor into the air through evapotranspiration.
What the forest breathes into the sky
This form of moisture production is vital because it helps drive the water cycle across a very large geographic area.
The World Economic Forum released data on the Amazon Rainforest’s moisture production.
According to the report, Amazon Rainforest trees release twenty billion tons of water vapor daily.
Moisture originating from this activity influences precipitation and agricultural output. It also influences available freshwater resources and ecosystems across many areas of Central and South America.
Recent studies from the Monitoring of the Andes Amazon Program have provided crucial insights into how these complex weather patterns shift across the region.
In recent years, scientists have become increasingly concerned about ongoing deforestation and global warming. They worry that these changes could interfere with the process that creates these atmospheric moisture rivers.
Disruption of this massive moisture flow could send elements of the Amazon Rainforest to a tipping point.
A tipping point occurs when changes to an ecosystem result in abrupt, dramatic shifts. These shifts can lead to a drastically different ecosystem.
One remarkable discovery is that these vast moisture movements behave much like a river.
The river that never touches the ground
The term ‘flying river’ refers to the world’s largest river.
Unlike most rivers that flow across land, this river remains suspended in mid-air.
Therefore, rather than using channels to move along, it uses extensive atmospheric corridors of water vapor. Flying rivers exist above the Amazon Rainforest and traverse many countries in South America.
What happens if the river slows down?
While these rivers primarily consist of water vapor flowing through the air, researchers say they do more than transport water. They also help maintain rainfall across large portions of the Amazon Rainforest and support plant growth away from the ocean.
If deforestation disrupts these moisture pathways, less water could reach vulnerable areas of the rainforest.
Some researchers suggest that areas of Peru and Bolivia are at risk because their main source of atmospheric moisture is being disrupted.
If flying rivers begin to lose strength, researchers warn that the effects could extend far beyond forests.
Finding evidence of this hidden river highlights the Amazon’s dependence on atmospheric moisture. It also demonstrates how interconnected our environment truly is.
What we perceive as open space filled with little to no material matter is actually part of a larger system.
That system provides essential nourishment to possibly one of the planet’s most important ecosystems.