Intercomparison of total column ozone measurements from Suomi NPP OMPS and ground-based IR FTS during summer and fall of 2012

The pattern of seasonal total column ozone (TCO) change in the summer and fall of 2012 is shown. Independent data sets of TCO measurements from the Suomi NPP Ozone Mapping and Profile Suite (OMPS) satellite instrument and the Network for Detection of Atmospheric Composition Change (NDACC) ground-based infrared Fourier transform spectrometers (IR FTS) are compared for Los Angeles (USA), Wollongong (Australia) and Ny-Aalesund (Norway). The complementary nature of the UV and IR observational techniques, along with a thorough understanding of biases between a top-down and bottom-up approach, lends confidence to the measured seasonal change in TCO at mid- and high-latitudes. When temporal and spatial gradients in total column ozone are accounted for (e.g., coincident versus non-coincident measurements, spatial resolution of OMPS versus IR FTS measurements), offsets between the space- and ground-based data sets are well understood.