Trends of the (a) ozone profile, (b) RH, (c) time series of 8-hour average ozone (blue) and hourly mean carbon monoxide (red) concentrations, and (d) PV in Kaifeng between August 11 and August 15, 2019. (IMAGE)

Engineering

Trends of the (a) ozone profile, (b) RH, (c) time series of 8-hour average ozone (blue) and hourly mean carbon monoxide (red) concentrations, and (d) PV in Kaifeng between August 11 and August 15, 2019.

Caption

Trends of the (a) ozone profile, (b) RH, (c) time series of 8-hour average ozone (blue) and hourly mean carbon monoxide (red) concentrations, and (d) PV in Kaifeng between August 11 and August 15, 2019.

Credit

Fei Zhao et al.

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