ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Regional transport influence and emission source analysis of atmospheric CO2 concentrations in Shenyang area
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Abstract:
Based on high-precision online atmospheric CO2 concentration measurements from the Shenyang Urban Ecosystem Station during June 2023 to May 2024, the REBS(Robust extraction of baseline signal) algorithm was employed to separate regional background and pollution data. The influence of regional transport on atmospheric CO2 concentrations in Shenyang was analyzed using surface wind field data and MeteoInfo statistical software. The contributions of fossil fuel combustion emissions and ecosystem emissions/absorption to CO2 concentrations were estimated according to carbon conservation principles. Results show that the average CO2 concentration at Shenyang Urban Ecosystem Station was 477.2 ppm, with background and pollution concentrations averaging 474.9 ppm and 519.4 ppm, respectively. High-concentration CO2 air masses affecting Shenyang originated from the southwest during spring and summer, and from northwest and southwest during winter. The potential CO2 emission source regions throughout the year were mainly distributed in most parts of Liaoning and Jilin provinces, southern Heilongjiang, eastern Inner Mongolia, Beijing-Tianjin-Hebei region, Shandong Peninsula, and the Yellow Sea and Bohai Sea areas. Compared to other seasons, fossil fuel combustion emissions contributed more significantly to Shenyang"s atmospheric CO2 concentrations during autumn and winter.
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