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. 2021 Jan 31;10:100105. doi: 10.1016/j.aeaoa.2021.100105

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© 2021 The Authors

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Fig. 2 — CO concentrations from the Central Phoenix site plotted against planetary boundary layer height (A) and average wind speed taken at Phoenix Sky Harbor Airport (B). For 2020 the correlation coefficient between CO and PBH is −0.74 (p = 1·10⁻²³) and between CO and wind speed it is −0.60 (p = 1·10⁻¹³).