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. Aerosol retrieval using ozone lidars in the ultraviolet spectral region ischallenging but necessary for correcting aerosol interference in ozoneretrieval and for studying the ozone–aerosol correlations. This studydescribes the aerosol retrieval algorithm for a tropospheric ozone lidar,quantifies the retrieval error budget, and intercompares the aerosolretrieval products at 299 nm with those at 532 nm from a high spectralresolution lidar (HSRL) and with those at 340 nm from an AErosol RObotic NETwork radiometer. After the cloud-contaminated data are filtered out, theaerosol backscatter or extinction coefficients at 30 m and 10 min resolutions retrieved by the ozone lidar are highly correlated with the HSRLproducts, with a coefficient of 0.95 suggesting that the ozone lidar canreliably measure aerosol structures with high spatiotemporal resolutionwhen the signal-to-noise ratio is sufficient. The actual uncertainties ofthe aerosol retrieval from the ozone lidar generally agree with ourtheoretical analysis. The backscatter color ratio (backscatter-relatedexponent of wavelength dependence) linking the coincident data measured bythe two instruments at 299 and 532 nm is 1.34±0.11, while theÅngström (extinction-related) exponent is 1.49±0.16 for amixture of urban and fire smoke aerosols within the troposphere aboveHuntsville, AL, USA.

Evaluation of UV aerosol retrievals from an ozone lidar