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“It’s well-established fact that a large part of Amazon is drying. We’ve been able to link that decline in precipitation to a decline in greenness over the last 10 years,” said Thomas Hilker, lead author of the study and forestry expert at Oregon State University.
Since 2000, rainfall has decreased by up to 25 percent across a vast swath of the southeastern Amazon, according to the new satellite analysis by Hilker. The cause of the decline in rainfall hasn’t been pinpointed, though deforestation and changes in atmospheric circulation are possible culprits.
The decrease mostly affected an area of tropical forest 12 times the size of California, as well as adjacent grasslands and other forest types. The browning of that area, which is in the southern Amazon, accounted for more than half the loss of greenness observed by satellites. While the decrease in greenness is comparatively small compared with the overall lushness of the rainforest, the impacts could be outsize.
That’s because the amount of carbon the Amazon stores is staggering. An estimated 120 billion tons of carbon are stashed in its plants and soil. Much of that carbon gets there via the forest flora that suck carbon dioxide out of the atmosphere.
Worldwide, “it essentially takes up 25 percent of global carbon cycle that vegetation is responsible for,” Hilker said. “It’s a huge carbon stock.
originally posted by: pikestaff
The forest area of Russia is 49 %, then there is the forestry of north america, Europe, the rest of south america, Asia, more than enough to cover any loss in Amazonia, plus the sea algae, it seems to me there is more than enough 'green' to keep oxygen breathers happy.
Any CO2 that Amazonia does not use will be welcomed by the rest of the CO2 breathers.
...the boreal forest stores most of its carbon in the soils, whereas the tropical forest stores most of the carbon in the plant biomass.
The future climate changes, caused by the increasing levels of CO2, will mostly affect the boreal forest by increasing the frequency of natural disturbances such as fire and insect outbreaks.
originally posted by: Iamschist
a reply to: ScientiaFortisDefendit
The people of the Amazon do not care about climate, most probably have no idea what that even is. They care about feeding their bellies, and getting into the modern age. Before you sit in judgement, look at our own clear cutting policies and how the US used to be solid forrest up to the plains.
We cannot halt progress in 3rd world countries it is the height of arrogance. We are very fond of pointing fingers and worring that 'others' are ruining the planet. We more than did our share in our time.
originally posted by: tavi45
Where are all the climate change deniers? I guess this particular thread is harder to argue with? Or is it because the thread didn't explicitly say "global warming" or "climate change" in the title?