Indoor simulating and monitoring method of underground ice isotope fractionation process

Abstract

The invention provides an indoor simulating and monitoring method of an underground ice isotope fractionation process. The indoor simulating and monitoring method of the underground ice isotope fractionation process comprises the following steps: simulating many types of soil saturation processes; testing isotope ratios of free water in the soil saturation processes; testing isotope ratios of bound water in the soil saturation processes; tracing isotopic fractionation of the free water and the bound water in the soil saturation processes; simulating the freezing and thawing process of saturated soil; tracing the isotopic fractionation of the free water and the bound water in the freezing and thawing process; simulating the forming process of underground ice in the saturated soil, and dividing the development stage of the underground ice; tracing isotope fractionation of the underground ice according to the development stage of the underground ice; assessing isotope fractionation of thefree water and the bound water in the process of participating in formation of the underground ice. By the indoor simulating and monitoring method, the operating efficiency is high, the portability is strong, a moisture and soil coupling action as well as the isotope fractionation process in the free water and bound water migrating and converting process and other key processes are scientificallyanalyzed, and obtained research results are reliable.

Description

technical field [0001] The invention belongs to the experimental field, and in particular relates to a realization method for indoor simulation and analysis of underground ice isotope fractionation process. Background technique [0002] Significant changes in the global climate have taken place, with the cryosphere bearing the brunt. Large-scale melting of glaciers and widespread degradation of permafrost have caused profound changes in the earth's atmospheric movement, water resource allocation, and ecological environment, which have attracted attention. Among them, the subsurface ice branch has become a hotspot and difficulty in international academic research. As an important geochemical index, the isotope in subsurface ice can reflect the external conditions of ice formation and development, and faithfully record the historical evolution process of the earth. Through the analysis of isotope data in polar and plateau ice cores and buried underground ice, humans have made ...

AI Technical Summary

Problems solved by technology

[0005] At present, the research on the isotope fractionation process of subsurface ice is still blank. In actual research, the inversion of subsurface ice is often carried out based on the ice wedge fractionation mechanism with completely different causes. The interpretation process is highly subjective, resulting in biased results.

Secondly, the underground freezing-thawing process is accompanied by complex phenomena such as water-soil coupling, water migration to the freezing front, and no targeted research methods have been explored.

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