Estimation of global carbon sink by surface carbonate karstification

Authors: Bin Jia*, +86-0773-2256047, Guoqing Zhou, +86-0773-5896073
Topics: Earth Science
Keywords: Carbonate rock, dissolution rate model, karst area, response surface method.
Session Type: Poster
Day: 4/11/2018
Start / End Time: 3:20 PM / 5:00 PM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded

The lithosphere is the largest storage of carbon on Earth. The study of rock weathering and the role of carbon dioxide in the atmosphere provide an important basis for the accurate prediction of changes in atmospheric carbon dioxide, and are crucial to the prediction of global climate change. One of the main factors that have been neglected in the global carbon cycle study of carbonate weathering carbon sinks is the rate problem. In this paper, the influence factors of karst carbon sinks are selected and the appropriate dissolution rate models are selected by using the response surface method. And then the data predicted by the model were compared with the data provided paper of Liu Rui, which are close to the measured data. The validated model can provide a research method for the carbonate certification rate in different regions, and solve the problems that cannot be tested because of time and space constraints. At last, net sink of carbon dioxide in the atmosphere is calculated as 0.152 GtC/yr, which is close to the data measured by Ichikuni态Kitano and Liu Zaihua. The result accounts for 15% of the "miss carbon sinks", which provides a basis for about 10% to 20% of the carbon of disappearing without a trace in the atmosphere. Therefore, carbon sink of global surface carbonate karstification in Karst area is estimated in the paper, which laid the foundation on the global carbon cycle and global climate, and provide scientific basis for human rational utilization of energy.

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