MAX-DOAS measurements in southern China: retrieval of aerosol extinctions and validation using ground-based in-situ data X. Li1,2, T. Brauers2, M. Shao1, R. M. Garland3, T. Wagner4, T. Deutschmann5, and A. Wahner2 1College of Environmental Sciences and Engineering, Peking University, Beijing, China 2Institute for Chemistry and Dynamics of the Geosphere (ICG-2), Forschungszentrum Jülich, Germany 3Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany 4Satellite Group, Max Planck Institute for Chemistry, Mainz, Germany 5Institute for Environmental Physics, Universität Heidelberg, Heidelberg, Germany
Abstract. We performed MAX-DOAS measurements during the PRiDe-PRD2006 campaign
in the Pearl River Delta region 50 km north of Guangzhou, China, for 4 weeks
in June 2006. We used an instrument sampling at 7 different elevation angles
between 3° and 90°. During 9 cloud-free days, differential slant
column densities (DSCDs) of O4 (O2 dimer) absorptions between
351 nm and 389 nm were evaluated for 6 elevation angles. Here, we show
that radiative transfer modeling of the DSCDS can be used to retrieve the
aerosol extinction and the height of the boundary layer. A comparison of the
aerosol extinction with simultaneously recorded, ground based nephelometer
data shows excellent agreement.
Citation: Li, X., Brauers, T., Shao, M., Garland, R. M., Wagner, T., Deutschmann, T., and Wahner, A.: MAX-DOAS measurements in southern China: retrieval of aerosol extinctions and validation using ground-based in-situ data, Atmos. Chem. Phys., 10, 2079-2089, doi:10.5194/acp-10-2079-2010, 2010.