《Table 1DCO decadal goals.》

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《深碳观测计划——对地球内部碳的十年探索》

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DCO is making rapid advances in our understanding of the role of aqueous fluids in the deep carbon cycle.Until recently，thermodynamic models developed to understand water-rock interactions in Earth’s upper and middle crust could not be extended to deeper environments，largely because the dielectric constant of water at extreme conditions was unknown.DCO scientists removed this barrier by conducting first-principles calculations of the dielectric constant of water under extreme conditions and the transport of carbonates in the deep Earth[22].These calculations were used in combination with experimental results[23]to develop the Deep Earth Water（DEW）model[24].Initial results from the DEW model demonstrate that organic carbon plays an important role in subduction zone fluids[25]and that diamonds can form due to pH shifts in deep fluids[26].The role of carbon in setting the p H of subduction zone fluids can now be assessed，with implications for volatile and metal cycles[27].This approach is transforming our view of global geochemical transport[28].