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An Ozone Depletion Event Measured on board the Polarstern

Plot of an ozone depletion event measured on board the research ship Polarstern
An ozone depletion event measured on board the Polarstern in the Arctic during spring 2003 in the vicinity of new ice fields. Data from a land station at Ny-Alesund, Spitsbergen is shown in grey for comparison, illustrating that the observed ozone depletion is occurring locally rather than being due to long range transport of ozone free air. The grey bar indicates a drop in ozone from 40ppb to close to zero in approximately 7 hours. This plot is from Jacobi et al. 2006 (see references for full citation)