par Camy-Peyret, Claude;Bergqvist, Björn;Galle, B.;Carleer, Michel ;Clerbaux, Cathy ;Colin, Réginald ;Fayt, C.;Goutail, Florence;Nunes-Pinharanda, M.;Pommereau, Jean Pierre;Hausmann, M.;Platt, U.;Pundt, I.;Rudolph, T.;Hermans, Christian ;Simon, Paul C ;Vandaele, Ann Carine ;Plane, J.;Smith, Nicola J.
Référence Journal of atmospheric chemistry, 23, 1, page (51-80)
Publication Publié, 1996
Référence Journal of atmospheric chemistry, 23, 1, page (51-80)
Publication Publié, 1996
Article révisé par les pairs
Résumé : | The results of an intercomparison campaign of eight different long path UV-visible DOAS instruments measuring NO2, O3 and SO2 concentrations in a moderately polluted urban site are presented. For effective optical path lengths of 230 and 780 m the overall spread of these measurements (± 1 σ) are 5 x 1010, 6 x 1010 and 1 x 1010 molec·cm-3 (2.0, 2.4, and 0.4 ppb) for these molecules respectively when all instruments used a common set of absorption cross sections. The remaining differences are not completely random and the systematic differences are attributed to the different retrieval methods used for each instrument. |