|Title||Investigating differences in DOAS retrieval codes using MAD-CAT campaign data|
|Publication Type||Journal Article|
|Year of Publication||2017|
|Authors||Peters, E, Pinardi, G, Seyler, A, Richter, A, Wittrock, F, Bösch, T, Van Roozendael, M, Hendrick, F, Drosoglou, T, Bais, AF, Kanaya, Y, Zhao, X, Strong, K, Lampel, J, Volkamer, R, Koenig, T, Ortega, I, Puentedura, O, Navarro-Comas, M, Gómez, L, M. González, Y, Piters, A, Remmers, J, Wang, Y, Wagner, T, Wang, S, Saiz-Lopez, A, García-Nieto, D, Cuevas, CA, Benavent, N, Querel, R, Johnston, P, Postylyakov, O, Borovski, A, Elokhov, A, Bruchkouski, I, Liu, H, Liu, C, Hong, Q, Rivera, C, Grutter, M, Stremme, W, Khokhar, MF, Khayyam, J, Burrows, JP|
|Journal||Atmospheric Measurement Techniques|
|Type of Article||Research article|
The differential optical absorption spectroscopy (DOAS) method is a well-known remote sensing technique that is nowadays widely used for measurements of atmospheric trace gases, creating the need for harmonization and characterization efforts. In this study, an intercomparison exercise of DOAS retrieval codes from 17 international groups is presented, focusing on NO2 slant columns. The study is based on data collected by one instrument during the Multi-Axis DOAS Comparison campaign for Aerosols and Trace gases (MAD-CAT) in Mainz, Germany, in summer 2013. As data from the same instrument are used by all groups, the results are free of biases due to instrumental differences, which is in contrast to previous intercomparison exercises.