team Mark Sephton of Imperial College in London studied the effects of LHB, a period of infancy of the Solar System that lasted about 100 million years, and during which large meteor showers peppered the Earth and Mars.
Micrometeorites come mostly rocky asteroid belt between Mars and Jupiter. Micrometeorites orbital perturbations suffering can end up being gravitationally attracted to the Earth and Mars. Upon entering the upper layers of the atmospheres of these planets are heated to temperatures of about 1,000 degrees Celsius, releasing gases such as sulfur dioxide.
sulfur dioxide aerosols in the atmosphere is composed of solid and liquid particles that deflect sunlight and make the planet in question is cooler.
The authors of the new study have estimated that rainfall micrometeorites released about 20 million tons of sulfur dioxide each year in the upper atmosphere of Earth during the LHB.
This copious discharge of sulfur dioxide into the atmosphere of early Earth had the same cooling effect on climate than would be caused if there every year for 100 million years ago a volcanic eruption of the magnitude of the 1991 eruption Pinatubo. This eruption released into the atmosphere 17 million tons of gases, including sulfur dioxide, causing the Earth reached 10 per cent less sunlight and cooling the planet half a degree Celsius.
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