Guest post by Stefan Koester
Scientists at the University of Bristol in England are finding clues to the earth’s carbon cycle by studying diamonds that were once 435 miles below the earth’s surface. By examining the microscopic impurities within the diamonds, scientists are unlocking the many mysteries that remain regarding the carbon cycle and its many interrelated earth cycles. The worlds oceans are large carbon sinks that could be help answer solve some environmental questions. The discovery will also help researchers improve on the theory of plate tectonics. “The mantle is the biggest reservoir of carbon, and we know very little about it,” Dr. Michael Walter said. The scientists say that while the presence of this deep carbon will not influence climate, but there is a potential long-term sink for carbon in the lower mantle.