WMO/GAW Regional Intercomparison of Dobson Spectrophotometers for Asia 2026

The main objective of this project is to maintain the network of the Dobson ozone spectrophotometers operated in the Asian region. The intercomparison also serves as an assurance of the quality of the total ozone data sets created at WMO Member stations.  The importance of the Dobson intercomparison activity for systematic total column ozone observations has been reiterated in the various venues; lately in the Thirteenth meeting of the Parties to the Vienna Convention for the Protection of the Ozone Layer (UNEP/OzL.Conv.13/6). This activity coincides with the objectives of the General Trust Fund for Financing Activities on Research and Systematic Observations Relevant to the Vienna Convention. At the same time, it leads to the fulfillment of WMO/GAW/QC requirements for monitoring of the atmospheric total ozone.