Validation of IFE-1.6 SCIAMACHY limb ozone profiles

[摘要] The IFE-1.6 scientific data set of SCIAMACHY limb ozone profiles isvalidated for the period August–December 2002.The data set provides ozone profiles over an altitude range of 15–45 km.The main uncertainty in the profiles is the imprecise knowledgeof the pointing of the instrument, leading to retrievedprofiles that are shifted in altitude direction.To obtain a first order correction for the pointing error and the remaininguncertainties, the retrieved profiles are compared to their a-priori valueand ozone sondes based on absolute distance and equivalentlatitude criteria.A vertical shift of the satellite profiles with 2 km downwardis found to be an appropriate correction for the data set studied.A total root-mean-square difference between limb profiles andsondes of 10–15% remains for the stratospheric ozone profileafter application of the correction.Small biases are left above and below the ozone maximum at mid latitudes,where the vertical gradients in the retrieved product are in general too strong.

[学科分类] 大气科学