Method and system for evaluating carbon dioxide exchange capacity of lake water-gas interface

Abstract

The invention provides a lake water-gas interface carbon dioxide exchange capacity assessment method and system, and the method comprises the steps: obtaining lakebed elevation data and a plurality of driving data, inputting the lakebed elevation data and the plurality of driving data into a preset surface water-underground water coupling simulation model, and carrying out the calculation to obtain a lake water surface area; acquiring multiple groups of climate mode data, inputting the multiple groups of climate mode data into a flux block formula, and calculating to obtain water-gas interface carbon dioxide flux; and according to the lake water surface area and the water-gas interface carbon dioxide flux, calculating to obtain the lake water-gas interface carbon dioxide exchange capacity. According to the method, the physical distributed simulation and description of the lake are realized, each water balance item of the lake is comprehensively considered, the exchange capacity of the carbon dioxide on the water-gas interface of the lake is quantitatively evaluated through coupling with the climate mode, and compared with the traditional method, the method has the characteristics of low investment, high precision and strong physical mechanism.

Description

technical field [0001] The invention relates to the field of carbon flux estimation and calculation, in particular to a method and system for evaluating carbon dioxide exchange capacity at a lake water-air interface. Background technique [0002] Lakes are one of the most widely distributed water bodies on land. They are an important part of the terrestrial hydrosphere and are closely related to the natural carbon-water cycle. Driven by both hydrodynamics and water management, the lake's water level is constantly changing, and flooded land periodically emerges from the water in an area known as the sink zone. The continuous change of the sinking area is also accompanied by the change of the lake water surface area, which has a significant impact on the estimation of the lake water-air interface carbon dioxide exchange rate. One of the important aspects is that the calculation of the lake water-air interface carbon dioxide exchange rate must Consider changes in the water sur...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of relatively large estimation deviation and poor evaluation flexibility of the exchange rate of carbon dioxide at the water-air interface in the prior art, thereby providing a method for evaluating the exchange rate of carbon dioxide at the water-air interface of lakes and system

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