Shulou(Shulou.com)11/24 Report--

CTOnews.com, March 16, according to CCTV news, the Shi Yusheng research team of the National Engineering Research Center of remote Sensing Satellite Application of the Institute of Aerospace Information Innovation of the Chinese Academy of Sciences recently made progress in increasing atmospheric carbon dioxide concentration caused by global fire carbon emissions. Through atmospheric transport model simulation, combined with ground-based observations and satellite data verification, quantify the impact of global fire carbon emissions on atmospheric carbon dioxide concentration.

▲ impact of global fire carbon emissions on atmospheric carbon dioxide concentration | Source: CTOnews.com, official website of the Institute of Aerospace Information Innovation, Chinese Academy of Sciences, learned officially from the Institute of Air and Space Information Innovation of the Chinese Academy of Sciences that the results show that the annual average impact of global fire carbon emissions on atmospheric carbon dioxide concentration can reach 2.4 parts per year (ppm). It shows that fire is one of the key factors leading to the increase of global atmospheric carbon dioxide concentration, and has a significant impact on global warming and climate change. The results were published online on March 15 in the journal Environmental Science and Ecology.

According to reports, fire carbon emissions have the characteristics of periodicity, randomness, multi-point sources, wide range and difficult monitoring, showing a strong spatio-temporal heterogeneity, which makes an important contribution to the temporal and spatial distribution and dynamic change of global carbon dioxide. Quantifying the impact of fire carbon emissions on atmospheric carbon dioxide concentration is not only the basis of clarifying the carbon cycle of terrestrial ecosystems, but also the premise of clarifying the global and regional carbon balance.

The research team carried out a series of numerical simulation experiments based on the global atmospheric chemical transport model, quantified the impact of global fire carbon emissions on atmospheric carbon dioxide concentration changes on a grid scale, and clarified the important role of fire carbon emissions in the global terrestrial ecosystem carbon cycle and atmospheric carbon balance. Combined with the double verification of satellite and surface observation data, the simulation accuracy of the model is greatly improved (compared with satellite observation, the root mean square error is reduced from 2.403 to 1.980), which provides an effective method and technical support for the accurate calibration of fire carbon emission inventory.

The results show that the annual average effect of global fire carbon emissions on atmospheric carbon dioxide concentration can reach 2.4 parts per million (ppm), and there is a large seasonal variation. For example, Africa is the region with the highest biomass combustion emissions in the world, resulting in a maximum increase of 7.9-13.0 parts per million (ppm) of carbon dioxide concentrations in summer. The model evaluation results show that the simulation performance of using Fast Fire Emission Database (QFED) as the model prior fire carbon emission inventory is the best, and the difference is the least compared with satellite and ground observation results. At the same time, the results also show that the simulated carbon dioxide concentration is more sensitive to fire carbon emission inventory in southern South America and most of Eurasia, but less sensitive in central Africa and Southeast Asia.

The Institute of Aerospace Information Innovation of the Chinese Academy of Sciences said that this study provides a new way and method for finely quantifying the impact of fire carbon emissions on atmospheric carbon dioxide concentration changes, and provides a scientific basis for the management and control of biomass combustion. it plays a guiding role in the implementation of environmental policies such as ecological environment governance and coordinated emission reduction, which is helpful to promote greenhouse gas emission reduction in China. Better deal with the policy objectives of "carbon peak" and "carbon neutralization".

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