Development of remote sensing technique for lower tropospheric ozone by simultaneous measurement of UV and visible solar scattered light spectra

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A remote sensing technique to measure lower tropospheric ozone with a simultaneous measurement of UV and visible solar scattered spectra has been developed for investigating extensive surface ozone increases. Error analyses and validation measurements was conducted. Based on the surface observation, evaluation of ozone column amount from visible spectra has een succeeded with enough accuracy. The interference by surface Albedo spectra and the influence by aerosol scattering have been estimated with observational data and radiative transfer model calculations. Aircraft observations were conducted for the validation of the technique, and their data analyses are on-going now.