Validation of OMI tropospheric NOsub2/sub column data using MAX-DOAS measurements deep inside the North China Plain in June 2006: Mount Tai Experiment 2006

摘要

A challenge for the quantitative analysis of tropospheric nitrogen dioxide(NO₂) column data from satellite observations is posed partly by thelack of satellite-independent observations for validation. We performed suchobservations of the tropospheric NO₂ column using the ground-basedMulti-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) techniquein the North China Plain (NCP) from 29 May to 29 June, 2006. Comparisonsbetween tropospheric NO₂ columns measured by MAX-DOAS and the OzoneMonitoring Instrument (OMI) onboard the Aura satellite indicate that OMIdata (the standard product, version 3) over NCP may have a positive bias of1.6×1015 molecules cm−2 (20%), yet within theuncertainty of the OMI data. Combining these results with literaturevalidation results for the US, Europe, and Pacific Ocean suggests that abias of +20%/−30% is a reasonable estimate, accounting for differentregions.