What Do the Sahara Desert and the Amazon Have in Common?
The Amazon rainforest is in the northeast of South America and is a dense humid jungle, while the Sahara Desert is a mass of a nearly uninterrupted band of sand that lays on the northern part of Africa. When strong winds move across the Sahara, a huge cloud of dust rises in the air, then stretches between each of the continents. That is what connects the two—dust, lots of it.
A NASA satellite for the first time has quantified in three dimensions the dust that is moving across the Atlantic. Scientists have also been able to calculate how much phosphorus from the desert’s ancient lake bed is making the trip to one of the world’s most fertile places.
Watch as a NASA satellite tracks Saharan dust to the Amazon in 3D:
A paper published in Geophysical Research Letters, a journal of the American Geophysical Union, provides the first satellite-based estimate of this phosphorus transport over multiple years, said lead author Hongbin Yu, an atmospheric scientist at the University of Maryland.
This trans-continental journey of dust is important because of what is in the dust, Yu said. Specifically, the dust is picked up from the Bodélé Depression in Chad, an ancient lake bed where rock minerals composed of dead microorganisms are loaded with phosphorus. Phosphorus is an essential nutrient for plant proteins and growth, which the Amazon rain forest depends on in order to flourish, NASA said on their website.
NASA went on to report that the phosphorus that reaches Amazon soils from Saharan dust, an estimated 22,000 tons per year, is about the same amount as that lost from rain and flooding, Yu said. The finding is part of a bigger research effort to understand the role of dust and aerosols in the environment and on local and global climates.
“We know that dust is very important in many ways. It is an essential component of the Earth system. “Dust will affect climate and, at the same time, climate change will affect dust,” said Yu. To understand what those effects may be, first we have to try to answer two basic questions. How much dust is transported? And what is the relationship between the amount of dust transport and climate indicators?”
Data shows that an average of 182 million tons of dust every year is carried past the western edge of the Sahara.
While the dust is crossing the Atlantic, some falls to the surface or is forced down through rain events, but approximately 132 million tons ends up over the Amazon basin. Roughly 43 million tons travels on to the Caribbean Sea.
I would never have thought that dust would travel that far or have such a critical impact on local environments.
www.visiontimes.com
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I’m sorry…..which way does the earth rotate?
Which way does the jetstream travel?
This is as bad as the UK Gov used to cover up the poisoning of sheep next to the nuclear reactors at the same time that Chernobyl went wrong.
To try and tell us fine dust lifts up against 200mph winds and travels backwards to land on the tropical rainforests is …erm….questionable and worthy of justification and explanation.
I believe NASA is now no more than an official US Disinformation Service.