A23A-0269
Enhance Retrieval Sensitivity to Lower Tropospheric Ozone from OMI Measurements
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Zhaonan Cai1, Xiong Liu1, Kelly Chance2, Caroline R Nowlan1 and Kai Yang3, (1)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (2)Harvard-Smithsonian, Cambridge, MA, United States, (3)University of Maryland College Park, College Park, MD, United States
Abstract:
An advanced algorithm to retrieve ozone profiles and tropospheric ozone from OMI radiance has been developed. The algorithm will be updated to improve sensitivity to lower tropospheric ozone and reduce the interference from surface albedo. These efforts include: analyzing the spatiotemporal and spectral variation of fitting residuals in 270-350 nm to improve the characterization of OMI measurements errors, optimize fitting window using longer wavelengths up to 350 nm and explore alternative inversion techniques to further improve retrieval sensitivity. We will derive cloud and wavelength-dependent surface albedo parameters using the Ring effect and the O2-O2 absorption from longer wavelengths (340-365 nm) and apply them to ozone fitting windows instead of fitting them.
