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Seasonal Variation of CO2 Vertical Distribution in the Atmospheric Boundary Layer and Impact of Meteorological Parameters

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Abstract

This paper presents the seasonality of vertical profiles of CO2 within 0–1100 m at a suburban site and discussions on the impacts of meteorological parameters on it. CO2 concentrations as well as metrological conditions were measured on June 2–18, July 7–22 (21 days, summer), October 10–20 (10 days, autumn) in 2012, and January 15–February 1 (12 days, winter), May 7–23 (10 days, spring) in 2013. The CO2 vertical profiles were affected by meteorological conditions, source emissions, urban canopy and other factors. The CO2 concentrations’ comparison analysis between different seasons including spring, summer (previously published results), autumn and winter suggests that the highest peak of the CO2 concentration (450.00 ± 14.78 ppm) occurred during winter (2013-01-23 at 09:00–09:55) with neutral stability class whereas the lowest peak of the CO2 concentration (389.88 ± 4.67 ppm) occurred during summer (2012-07-17 at 15:48–16:40) with moderately stable conditions. The high levels of CO2 concentrations were due to the accumulation caused by the stable atmosphere dominant during the measurement period. Atmospheric CO2 concentrations in summer can be lower near the surface than at elevated altitude under certain conditions because terrestrial photosynthesis dominated the industrial pollutant emissions at that time. However, in other seasons, CO2 profiles showed monotonically declining trends with altitudes.

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Acknowledgements

The authors thank the support from the National Natural Science Foundation of China (No. 41005081) and financial supports through University of Calgary Eyes High doctoral recruiting scholarship.

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Correspondence to Ke Du.

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Esteki, K., Prakash, N., Li, Y. et al. Seasonal Variation of CO2 Vertical Distribution in the Atmospheric Boundary Layer and Impact of Meteorological Parameters. Int J Environ Res 11, 707–721 (2017). https://doi.org/10.1007/s41742-017-0062-y

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  • DOI: https://doi.org/10.1007/s41742-017-0062-y

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