Chemical Ozone Loss in the Arctic Winter 1994/95 as Determined by the Match Technique

摘要: The chemically induced ozone loss inside the Arctic vortex during winter 1994/95 has been quantified by coordinated launches of over 1000 ozonesondes from 35 stations within Match 94/95 campaign. Trajectory calculations, which allow diabatic heating or cooling, were used to trigger balloon so that concentrations in a large number air parcels are each measured twice few days apart. difference concentration is calculated for pair and interpreted as change caused chemistry. data analysis carried out January March between 370 K 600 potential temperature. Ozone along these trajectories occurred exclusively sunlit periods, periods coincided with, but slightly lagged, where stratospheric temperatures low enough polar clouds exist. Two clearly separated show up. rates first peaked late with maximum value 53 ppbv per day (1.6 % day) at 475 faster losses higher Then, mid-March reached 34 (1.3 day), observed lower down no was found above 480 period. hypothetical average diabetic descent integrated give an accumulated through winter. most severe depletion 2.0 ppmv (60 %) took place 515 on 1 450 20 March. Vertical integration levels gives column rate, 2.7 Dobson Units mid-March. 31 be 127 DU (∼36 %).