19/02/2021
𝐂𝐚𝐥𝐢𝐦𝐚: the warm wind coming from the desert of Sahara, bringing with it dust, sand and humid air, crossing the Atlantic Ocean. 🌊
This natural phenomenon can be seen from the orbit and felt by the Canarian residents as a fog; in the worst days, it even stops the public life or transport. Why is nature acting like this? Well, the explanation might be more miraculous than we thought and it might even be the reason why we breathe. 🌬️
The reason is called “𝑑𝑖𝑎𝑡𝑜𝑚𝑠”. These small microscopic particles living in the oceans are the reason all of us can breathe. This is how the cycle of nature works:
Dust and sand from the Sahara desert are crossing the Atlantic Ocean, reaching the Amazon forest - approximately 27 million tons of African dust falls on the Amazon river basin per year. This is the perfect fertiliser. As the plants and trees are growing, they transform the CO2 into oxygen.
“For all these years, I’ve been thinking the rainforest is the lungs of the planet. Sure, it makes a lot of oxygen, but it also uses all of it. The rainforest does help us breathe, but not because of air.”, Will Smith, “A strange rock”
The Amazon forest is always covered by clouds which get condensed and transform into raindrops that fall into the Amazon river, eroding the land and bringing the sediments into the ocean, serving as food for the diatoms. These microscopic organisms use the silica from the sediments, multiplying every day. 🥳
The diatoms are the secret of the oxygen on Earth - and even if we cannot see them directly while we’re in the ocean’s water, they can be seen from the space as a multitude of colours. When they die, their rests fall on the ocean’s floor and transform into “sea snow” that never melts, instead transforms into a salty desert, in a process that takes millions of years. 🏜️
Now, do you remember how we started this story? ✨
“About the sand that leaves Africa and goes all the way to the Amazon forest? One day, it was a seafloor. And the dust that makes the rainforest’s plants and trees grow? They’re diatom shells”, Chris Hadfield, astronaut, "A strange rock".
This is how amazing our planet is, a very good-working interconnected system. 🌏
Sources:
Nasa.gov
"A strange rock" series, "Gasp" episode
Aemet Canarias Twitter account