TY - JOUR A1 - Chen, D. A1 - Zhou, B. A1 - Beirle, S. A1 - Chen, L. M. A1 - Wagner, T. T1 - Tropospheric NO2 column densities deduced from zenith-sky DOAS measurements in Shanghai, China, and their application to satellite validation JO - Atmos. Chem. Phys. J1 - ACP VL - 9 IS - 11 SP - 3641 EP - 3662 Y1 - 2009/06/05 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/9/3641/2009/ L1 - http://www.atmos-chem-phys.net/9/3641/2009/acp-9-3641-2009.pdf DO - 10.5194/acp-9-3641-2009 ER -