I was watching on PBS within the last month, the reason the rainforests in the Amazon exist is due to the dust kicked up in the Sahara desert in Africa that travels around the world, creates rainclouds and drops.
We know that several thousand years ago the Sahara was no desert. And now we see that the Amazon was no rainforest around the same time.
Climate changes all on it’s own. Apparently alot.
“Climate changes all on it’s own. Apparently alot.”
If that 2000 - 3000 year number is correct, that to me is surprising, and is challenging. I’ve have said for a long time that climate change SHOULD be studied, and various scenarios should be thought out. Of course 2,000 years is a long time for us to adapt to new things. America’s heartland turned to a 2000 year long dust bowl would have a huge effect on the USA, but humanity would survive by growing the crops in the Sahara instead. (Unless we still have nukes, and end up having WW III over it.)
I’m more concerned with the next ice age. Would cause a world-wide drought with most of the water locked up in the ice.
I watched that same documentary with interest but became frustrated at the end because they never tried to make a connection re what the "rain forest" would have looked like when the Sahara was largely covered with shallow seas. Scouring the web revealed several efforts to make a connection that never made it into "prestigious journals". Not sure what to make of that. Maybe if they blamed humans for draining the Sahara they could have gotten published???
In any case, and just like this guy found, most conclusions were the South American rain forest was savanna type landscape when the Sahara was wetter. It becomes even more interesting when investigating a cause for this "climate change". This of course happened well past the end of the last glaciation??? Whatever. The theories run the gamut from pole shifts to alien terra formers. From most accounts the change was relatively swift, in geologic time.
The scientific community™ is nothing if not frustrating. They apparently go as far as the money and no farther. Maybe journal publishers can share the blame since they are the ones who select studies and research that make the cut? In a publish or perish environment whaddaya gonna do, but I digress...
Actually the -4026 BC Chevrolet Tahoe was a real smog box. It polluted the air all around the dirt patch where it drove burning slash grass ethanol.