The Diurnal Variation in Stratospheric Ozone from MACC Reanalysis, ERA-Interim, WACCM, and Earth Observation Data: Characteristics and Intercomparison

In this study, we compare the diurnal variation in stratospheric ozone of MACC (Monitoring Atmospheric Composition and Climate) reanalysis, ECMWF Reanalysis Interim (ERA-Interim), free-running WACCM (Whole Atmosphere Community Climate Model). The results from photochemical dynamical processes depending on altitude, latitude, season. reanalysis use similar chemistry modules calculate a cycle when it is caused by variation. two model systems are confirmed observations Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) experiment three selected sites Network for Detection Change (NDACC) at Mauna Loa, Hawaii (tropics), Bern, Switzerland (midlatitudes), Ny-Ålesund, Svalbard (high latitudes). On other hand, product ERA-Interim shows considerably less due to variations. global maxima occur high latitudes summer, e.g., near Arctic NDACC site Svalbard. local OZORAM radiometer observes effect good agreement with WACCM. sensed Ny-Ålesund up 8% (0.4 ppmv) variations summer negligible during dynamically dominated winter. However, dynamics play major role as lower stratosphere (100–20 hPa), models which assimilate data radiosondes satellites outperform Such domain Antarctic polar winter where surprising novel feature indicated edge vortex. This accounts both systems. summary, provides description interest trend analysis research based merged satellite or measurements different time.