Sunday, July 21, 2024

Time ago it was desertification, 'turning the Earth barren,' and 'leaving entire countries facing famine'; now the worry is that in the receding drylands 'vegetation may soak up scarce water supplies'

Although by then it was well-known that it was a better theory that the deserts were receding and the earth was greening, than the opposite one (the deserts were extending), since at least 2016*, and that there was a continental-scale greening (not specifically of dry areas) since 1997**, The Guardian, as late as 2021, had the nerve to say (my emphasis):


"Desertification is turning the Earth barren – but a solution is still within reach. The expansion of drylands is leaving entire countries facing famine. It’s time to change the way we think about agriculture" — David R Montgomery. The Guardian, Jun 2021. https://www.theguardian.com/commentisfree/2021/sep/02/desertification-barren-solution-famine-agriculture


The guy is not a journo... It is (& was at the moment) professor of geomorphology at the University of Washington.


When I thought the revenge finally came, a top notch university saying the drylands were going green, as was known for a decade:


With CO2 Levels Rising, World’s Drylands Are Turning Green. Fred Pearce. Yale Environment 360, Jul 16 2024. https://e360.yale.edu/features/greening-drylands-carbon-dioxide-climate-change


, I had to experience a deep disappointment... Unfortunately, even admitting to this stuff of a greening earth, of course they found that something bad and very worrying is happening, despite this positive "news": "But scientists warn this added vegetation may soak up scarce water supplies." :-)



* Zhu, Z., Piao, S., Myneni, R. et al. Greening of the Earth and its drivers. Nature Clim Change 6, 791–795 (2016). https://doi.org/10.1038/nclimate3004


** Myneni, R. B., Keeling, C. D., Tucker, C. J., Asrar, G. & Nemani, R. R. Increased plant growth in the northern high latitudes from 1981 to 1991. Nature 386, 698–702 (1997). https://doi.org/10.1038/386698a0

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