OPAL - NETWORK FOR THE DETECTION OF STRATOSPHERIC CHANGE OZONE PROFILER ASSESSMENT AT LAUDER, NEW-ZEALAND 2 - INTERCOMPARISON OF REVISED RESULTS

Following a blind intercomparison of ozone profiling instruments in th e Network for the Detection of Stratospheric Change at Lauder, New Zea land, revisions to the analyses were made resulting in a new data set. This paper compares the revised results from two differential absorpt ion lidars (RIVM and GSFC), a microwave radiometer (Millitech/LaRC), a nd electrochemical concentration cell (ECC) balloon sondes (NIWA). In general, the results are substantially improved compared to the earlie r blind intercomparison. The level of agreement was similar both for s ingle profiles and for the campaign average profile and was approximat ely 5% for the lidars and the sondes over the altitude range from 15 t o 42 km (32 km for sondes). The revised microwave data show a bias of 5-10% high in the region from 22 to 42 km. Starting at 42 km, the lida r errors increase significantly, and comparisons of the microwave resu lts were not possible above this altitude.