Spatial structure of assimilated ozone in the upper troposphere and lower stratosphere

摘要: [1] Ozone distributions display a rich spatial structure in the upper troposphere and lower stratosphere (UTLS). This study uses situ aircraft observations to examine how accurately such of ozone are represented an assimilation NASA's EOS-Aura data using meteorological fields from Goddard Earth Observing System, Version 4. Total columns Ozone Monitoring Instrument (OMI) stratospheric profiles Microwave Limb Sounder (MLS) assimilated. The results demonstrate that dominant large-scale distribution is well-constrained (to realistic concentrations) near 250 hPa UTLS. Spatial patterns spectral power variations similar model simulations assimilation. analysis increments concentrated at large scales. Thus transport, rather than direct small-scale features, responsible for Consistent with documented behavior Lin-Rood transport scheme, we assimilated represents features on scales about four-to-six grid boxes (500–800 km) smaller present too weakly modeled fields. For ozone, this result robust over range model-error-covariance length indicate constrain gradients suited producing global analyses UTLS represent higher resolution.