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the one you were originally replying to :)

itishappy 3y ago
Got it (there's another linked further up the thread). Let's think! The NASA article claims our planet became greener from 1982-2015. The new study agrees the earth became significantly greener in the 80s and 90s, but the trend started reversing in the 2000s. I think they do not necessarily contradict each another.
- robertlagrant 3y ago
  That would be the case if the NASA article was "The earth became greener from 1985-2000", but that's not the case. I think the quotes you cited earlier, which add up to "The baddies say this; here's a superficial response you can brush them off with", are indicative of the problem with politicised science. No one will admit that things might not be as they are constantly communicated to be, generally by communicators who are not scientists. In this case: it's interesting that CO2 has a negative feedback loop where less CO2 means fewer plants, increasing CO2, and more CO2 means more plants, decreasing CO2; have climate models taken this into account (enough)?
- kbutler 3y ago
  Nasa also says the world was greening 2000-2017 https://www.nasa.gov/centers-and-facilities/ames/human-activity-in-china-and-india-dominates-the-greening-of-earth-nasa-study-shows/ https://www.nasa.gov/centers-and-facilities/ames/human-activ... 5% increase in leaf area over the period (from CO2 and land-use changes) https://www.nature.com/articles/s41893-019-0220-7 https://www.nature.com/articles/s41893-019-0220-7 The paper for this thread https://www.science.org/doi/10.1126/sciadv.aax1396 https://www.science.org/doi/10.1126/sciadv.aax1396 also addresses data generally ending in 2015, and says "all four LAI [Leaf Area Index] datasets exhibited a transition from increasing trends before the late 1990s to decreasing trends afterward (fig. S5)" Those claims appear to be in direct contradiction, and I don't see any immediate way to reconcile them.

Got it (there's another linked further up the thread). Let's think! The NASA article claims our planet became greener from 1982-2015. The new study agrees the earth became significantly greener in the 80s and 90s, but the trend started reversing in the 2000s. I think they do not necessarily contradict each another.

robertlagrant 3y ago
That would be the case if the NASA article was "The earth became greener from 1985-2000", but that's not the case. I think the quotes you cited earlier, which add up to "The baddies say this; here's a superficial response you can brush them off with", are indicative of the problem with politicised science. No one will admit that things might not be as they are constantly communicated to be, generally by communicators who are not scientists. In this case: it's interesting that CO2 has a negative feedback loop where less CO2 means fewer plants, increasing CO2, and more CO2 means more plants, decreasing CO2; have climate models taken this into account (enough)?
kbutler 3y ago
Nasa also says the world was greening 2000-2017 https://www.nasa.gov/centers-and-facilities/ames/human-activity-in-china-and-india-dominates-the-greening-of-earth-nasa-study-shows/ https://www.nasa.gov/centers-and-facilities/ames/human-activ... 5% increase in leaf area over the period (from CO2 and land-use changes) https://www.nature.com/articles/s41893-019-0220-7 https://www.nature.com/articles/s41893-019-0220-7 The paper for this thread https://www.science.org/doi/10.1126/sciadv.aax1396 https://www.science.org/doi/10.1126/sciadv.aax1396 also addresses data generally ending in 2015, and says "all four LAI [Leaf Area Index] datasets exhibited a transition from increasing trends before the late 1990s to decreasing trends afterward (fig. S5)" Those claims appear to be in direct contradiction, and I don't see any immediate way to reconcile them.