VALIDATION OF GOMOS (GOPR 6.0A) AND SCIAMACHY (V5.1/2.1) O_3 AND NO_2 PRODUCTS WITH GOME (V3.0 AND IUP RETRIEVALS), HALOE (V19) AND SAGE II (6.2)

摘要

The operational data products of O_3 and NO_2 from therntwo ENVISAT instruments GOMOS andrnSCIAMACHY are validated by comparison with otherrnspace borne instruments. Except for latitudes >40°S,rnSCIAMACHY operational O_3 columns (v5.1) show anrnagreement within 2% with GOME 3.0 and a negativernbias of 0-5% with the scientific GOME-WFDOASrnproduct [1]. Both SCIAMACHY NO_2 columns, thernoperational v5.1 compared to GOME 3.0 and thernscientific SCIAMACHY_IUP compared to GOME_IUPrn[2], show an agreement within 15% at most latitudes.rnSCIAMACHY O_3 profiles (v2.1) are within –6 to 20%rn(RMS 20-25%) with HALOE and SAGE II. But,rnSCIAMACHY NO_2 profiles (v2.1) are showing a highrnpositive bias of 50% (RMS 50%) to HALOE (includingrnphotochemical corrections for HALOE NO_2 data) andrn10% of the profiles have unphysical values. ThernGOMOS O_3 profiles (v6.0a) are within 5% (RMS 5-rn15%) compared to SAGE II. GOMOS NO_2 profilesrn(v6.0a) are within -30 to +60% (RMS 10-30%) tornSAGE II (including photochemical corrections).