Scientists have recently proposed that ocean and oxygen would remove from the earth and temperature will rise after about 2 billion years and the life would be completely finished on Earth within about 2.8 billion years.
International Journal of Astrobiology
Jack O’Malley James, Ph.D. astrobiologist at the University of St Andrews, has generated a computer model and found that the first changes will take place in the next few billion years. He will present this research at the ongoing Royal Astronomical Society national meeting at St. Andrews, Scotland, taking place this week.
“Increased evaporation rates and chemical reactions with rainwater will draw more and more carbon dioxide from the Earth’s atmosphere,” the Royal Astronomical Society stated. “The falling levels of CO2 [carbon dioxide] will lead to the disappearance of plants and animals and our home planet will become a world of microbes.”
According to the findings, there would be no oceans on earth after about two billion years in the future as the temperature of the earth would rise and oxygen will be short.
“The far-future Earth will be very hostile to life by this point,” O’Malley James stated. “All living things require liquid water, so any remaining life will be restricted to pockets of liquid water, perhaps at cooler, higher altitudes or in caves or underground.”
There would be no life after about 2.8 billion years.
“We have now simulated a dying biosphere composed of populations of the species that are most likely to survive to determine what types of gases they would release to the atmosphere. By the point at which all life disappears from the planet, we’re left with a nitrogen:carbon-dioxide atmosphere with methane being the only sign of active life”, O’Malley-James added.
Jack T. O’Malley-James, Jane S. Greaves, John A. Raven and Charles S. Cockell (2013). Swansong biospheres: refuges for life and novel microbial biospheres on terrestrial planets near the end of their habitable lifetimes International Journal of Astrobiology DOI: 10.1017/S147355041200047X