One other new examine says that warming and CO2-induced greening are COOLING land floor temperatures – watts with that?
From the NoTricksZone
By Kenneth Richard on January 21, 2021
Since the 1980s, warming and increasing CO2 fertilization have triggered a global greening trend. This leads to a “greening-induced cooling effect” in land surface temperatures.
In the past 9 months we highlighted one study (Haverd et al., 2020Claiming that rising CO2 and warming are the main reasons behind the strong greening trend on earth after the 1980s. This greening expands the earth’s carbon sink so much that the greening of the earth will offset 17 years (equivalent) of anthropogenic CO2 emissions by 2100.
Image source: Haverd et al., 2020
In August we presented another study, Piao et al., 2020This suggests the same principles and suggests that the net effect of more CO2-driven greening is more cooling and expansion of the carbon sink.
Since the 1980s, 29% of human CO2 emissions have been offset by CO2-induced greening of the earth. The vegetative greening after 2000 was so massive (5.4 million km²) that the net increase in area corresponds to a region the size of the Amazon rainforest.
Image source: Piao et al., 2020
At the end of November (2020) another study (Chen et al., 2020) was published highlighting the “widespread increasing trends” in the Greening / Leaf Area Index (LAI) since the 1980s that are due to “warming … CO2 fertilization” and land management.
The authors emphatically support the “Earth greening cools LST [land surface temperatures]”Conclusions others have highlighted, noting that” the area of LAI-induced cooling (30%) is six times that of LAI-induced heating (5%). “
Image source: Chen et al., 2020
Finally, a further study from 2020 highlighted a visual representation that confirms the strong cooling effects of greening / reforestation.
Huang et al. (2020) found a staggering cooling trend of -0.12 ° C per year (-1.2 ° C per decade!) related to the recent (1992-2015) land cover changes (LLCs) across Europe – a region where arable land is increasingly in Forests being converted.
“At the average European level, transitions from forest to another land cover class show moderate warming effects, including the conversion of forests into arable land (+0.15 ± 0.03 ° C), grassland (+0.23 ± 0.06 ° C) and City (+) 0.27 ± 0.06 ° C). Urban sprawl always shows warming contributions, regardless of the type of previous land cover. “
Image source: Huang et al., 2020
Do you want to warm local and regional land surface temperatures? Chop down forests and build urban areas.
Do you want to cool local and regional land surface temperatures? Plant trees and bring farmland back to wooded areas.
The latter option appears to be far more effective and cost effective than trying to reduce CO2 emissions, as our simultaneous energy needs are increasing rapidly across the global landscape.
4.9
9
be right
Item rating
Like this:
Loading…
Comments are closed.