The upper stratospheric ozone budget: An update of calculations based on HALOE data

On the basis of data obtained by the Halogen Occultation Experiment (HALOE) on the Upper Atmosphere Research Satellite (UARS) box model calculations a re performed to investigate the ozone budget in the upper stratosphere. The HALOE data comprise measurements of major source gases and key chemical sp ecies involved in the ozone destruction cycles. In comparison to earlier ca lculations using version 17 of the HALOE data, the calculated ozone destruc tion rate increases when the updated data version 18 is used. However, as w ith the previous study using version 17 of the HALOE data, no evidence for a significant model ozone deficit is found.