STUDY: Earth Has Natural Thermostat To Regulate Climate…
The possibility of controlling the Earth?s temperature has long led to various experiments by inquisitive scientists, but without great results. Now a recent study found proof for the first time ever of a natural thermostat that helps regulate the planet during extreme temperature swings.
British scientists say they?ve discovered that the preeminent mechanism that allows the Earth to recover from global cooling events is linked to the weathering of rocks.Rocks dissolve by rain and river waterduring the weathering process, and carbon dioxide is taken from the atmosphere to carbon-rich rocks in nearby waterways. When weathering runs its course,there?sa decrease in carbon dioxideonour planet.
A recent study found proof for the first time ever that the Earth employs a natural thermostat? to regulate the climate during periods of extreme temperature swings.
The researchers examined rocks from about 445 million years ago, whichmatches out to thesecond largest extinction period in the planet?s history. Using samples from Canada and Scotland, the rocks showed that the global chemical weathering rate declined, which meant less carbon dioxide was removed and the climate was able to recover from the cool temperature.
?From looking at the relative abundance of lithium isotopes in ocean-derived rocks, we were able to confirm that chemical weathering is the driver of the Earth?s natural thermostat,? explains lead scientist, Dr. Philip Pogge von Strandmann, in anews release. When there is a warmer climate, there is more weathering, and when it is cooler there is less weathering: this is what you would expect, given that chemical reactions go faster with increasing temperature.?
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