Ocean floats provide yet more evidence of global warming, revealing that rainy regions are getting wetter and dry regions drier much faster than predicted
In 2008 Kröpelin—not involved in the new satellite research—visited Western Sahara, a disputed territory controlled by Morocco.
"The nomads there told me there was never as much rainfall as in the past few years," Kröpelin said. "They have never seen so much grazing land."
"Before, there was not a single scorpion, not a single blade of grass," he said.
"Now you have people grazing their camels in areas which may not have been used for hundreds or even thousands of years. You see birds, ostriches, gazelles coming back, even sorts of amphibians coming back," he said.
"The trend has continued for more than 20 years. It is indisputable."