Environment: After heavy rains, large parts of the Sahara desert turn green!
Virendra Pandit
New Delhi: With nearly half a foot of rain, large parts of the Sahara desert, one of the driest places on Earth, are witnessing a surprising burst of greenery, the media reported.
Heavy rainfall has led to vegetation sprouting across the typically barren Sahara desert, US Space Agency. NASA’s satellite images reveal.
Patches of plant life emerged in the desert following an extratropical cyclone that drenched parts of northwestern Africa on September 7 and 8. Regions in Morocco, Algeria, Tunisia, and Libya, which rarely receive rain, are now showing traces of green, according to NASA’s Earth Observatory.
Shrubs and trees are growing in low-lying areas like riverbeds, Sylwia Trzaska, a climate variability researcher at the Columbia Climate School, said.
Peter de Menocal, president of the Woods Hole Oceanographic Institution, noted that while it’s rare, plant life does respond quickly to heavy rain events in this part of Africa. When substantial rain falls, dunes transform into lush, green landscapes for a brief time as plants take advantage of the moisture.
Researches show that, historically, the Sahara desert was once covered in vegetation and lakes between 11,000 and 5,000 years ago. Now, even lakes that are typically dry are filling up due to this recent deluge, according to Moshe Armon, a lecturer at the Institute of Earth Sciences, Hebrew University of Jerusalem.
The unusual rainfall was triggered by the northward movement of the tropical rain belt, known as the Intertropical Convergence Zone, reaching farther north than usual, bringing heavy rains typical of equatorial regions into the Sahara. Some areas saw over half a foot of rain, which far exceeds the typical annual precipitation of just a few inches.
While the rains largely affected thinly populated areas, devastating floods have killed over 1,000 people and affected around 4 million people across 14 African nations, according to the World Food Programme.
According to experts, the shift in the rain belt is influenced by record-high ocean temperatures and climate change, which could lead to further changes in rainfall patterns across Africa. However, as ocean temperatures balance out globally, the rain belt is expected to shift back south, potentially crossing the equator.
Experts suggest that the repositioning of the rain belt may be linked to record-high ocean temperatures and climate change, potentially altering rainfall patterns throughout Africa. However, as global ocean temperatures stabilize, de Menocal expects that the rain belt may revert to a more southerly position, possibly crossing the equator.
