Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 28, Issue 23, Pages 29908-29918Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-021-12754-8
Keywords
Eddy covariance; CO2 concentrations; Urban CO2 fluxes; Meteorological conditions; Artificial neural network; Self-organized maps
Categories
Ask authors/readers for more resources
Analyzing data on CO2 concentrations, eddy covariance fluxes, and meteorological parameters in the city center of Florence, Italy, showed that CO2 concentrations are influenced by meteorological conditions and anthropogenic emissions. An artificial neural network model outperformed linear models in predicting CO2 concentrations, with meteorological parameters, particularly wind speed, playing a primary role in influencing CO2 concentrations.
A multi-year dataset of measurements of CO2 concentrations, eddy covariance fluxes, and meteorological parameters over the city centre of Florence (Italy) has been analysed to assess the role of anthropogenic emissions and meteorology in controlling urban CO2 concentrations. The latter exhibited a negative correlation with air temperature, wind speed, solar radiation, and sensible heat flux and a positive one with relative humidity and emissions. A linear and an artificial neural network (ANN) model have been developed and validated for short-term modelling of 3-h CO2 concentrations. The ANN model performed better, with mean bias of 0.58 ppm, root mean square error within 30 ppm, and r(2)=0.49. Data clustering through the self-organized maps allowed to disentangle the role played by emissions and meteorological parameters in influencing CO2 concentrations. Sensitivity analysis of CO2 concentrations revealed a primary role played by the meteorological parameters, particularly wind speed. These results highlighted that (i) emission reduction actions at local urban scale should be better tied to actual and expected meteorological conditions and (ii) those actions alone have limited effects (e.g. a 20% emission reduction would result in a 3% CO2 concentrations reduction). For all these reasons, large-scale policies would be needed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available