Abstract. Aerosol retrieval using ozone lidars in the ultraviolet spectral region is
challenging but necessary for correcting aerosol interference in ozone
retrieval and for studying the ozone–aerosol correlations. This study
describes the aerosol retrieval algorithm for a tropospheric ozone lidar,
quantifies the retrieval error budget, and intercompares the aerosol
retrieval products at 299 nm with those at 532 nm from a high spectral
resolution lidar (HSRL) and with those at 340 nm from an AErosol RObotic NETwork radiometer. After the cloud-contaminated data are filtered out, the
aerosol backscatter or extinction coefficients at 30 m and 10 min resolutions retrieved by the ozone lidar are highly correlated with the HSRL
products, with a coefficient of 0.95 suggesting that the ozone lidar can
reliably measure aerosol structures with high spatiotemporal resolution
when the signal-to-noise ratio is sufficient. The actual uncertainties of
the aerosol retrieval from the ozone lidar generally agree with our
theoretical analysis. The backscatter color ratio (backscatter-related
exponent of wavelength dependence) linking the coincident data measured by
the two instruments at 299 and 532 nm is 1.34±0.11, while the
Ångström (extinction-related) exponent is 1.49±0.16 for a
mixture of urban and fire smoke aerosols within the troposphere above
Huntsville, AL, USA.
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