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Author Topic: Recovery/prevention of desertification  (Read 1066 times)

LRC1962

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Recovery/prevention of desertification
« on: April 07, 2015, 11:14:49 PM »
Desertification is going to be one of the big land based positive (very bad) feedbacks of higher temperatures. See how much the Sahara Desert influences Atlantic storms and also rainfall in the Amazon. Dust Storms In Sahara Desert Trigger Huge Plankton Blooms In Eastern Atlantic. seems to put a positive spin on things. Wonder how much an impact Africa would be if Sahara was all vegetation?
Back on topic. Came across two different approaches to reclaiming land. Very different and acotding to these reports both successful.
https://youtu.be/vpTHi7O66pI
https://youtu.be/K1rKDXuZ8C0
"All truth passes through three stages: First, it is ridiculed; Second,  it is violently opposed; and Third, it is accepted as self-evident."
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anotheramethyst

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Re: Recovery/prevention of desertification
« Reply #1 on: September 15, 2015, 06:00:52 AM »
according to thom hartmann, one tree has the same amount of evaporative surface (all its leaves) as a one acre lake, and contributes the same amount of water vapor to the atmosphere.  this is why clear cutting causes desertification (as well as exposing the soil to uv light).

Hefaistos

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Re: Recovery/prevention of desertification
« Reply #2 on: March 15, 2017, 10:30:23 AM »
A new paper authored by archeologists with Seoul National University has suggested that the Sahara Desert, once green and wet, dried out as a result of the actions of ancient peoples. The spread of agriculture depleted the Sahara’s plant life and caused the region’s the shift to a desert biome, the paper claims.
Very interesting research, with some implications for what's going on in the Arctic now.

"The underlying causes of this drying and desertification has previously been attributed to subtle changes in the Earth’s orbit, which in turn influenced atmospheric weather patterns and led to a reduction of the amount of rainfall in northern Africa. But Wright, whose scientific research has led him to exploring Neolithic-age archaeological sites all over the world, suggests that this is not the full picture. “In East Asia there are long established theories of how Neolithic populations changed the landscape so profoundly that monsoons stopped penetrating so far inland”, explains Wright, also noting in his paper that evidence of human-driven ecological and climatic change has been documented in Europe, North America and New Zealand. Wright believed that similar scenarios could also apply to the Sahara."

https://blog.frontiersin.org/2017/03/14/did-humans-create-the-sahara-desert/

Full paper:
http://journal.frontiersin.org/article/10.3389/feart.2017.00004/full