The Global Structure of UTLS Ozone in GEOS-5: A Multi-Year Assimilation of EOS Aura Data

摘要: Eight years of ozone measurements retrieved from the Ozone Monitoring Instrument (OMI) and Microwave Limb Sounder, both on EOS Aura satellite, have been assimilated into Goddard Earth Observing System version 5 (GEOS-5) data assimilation system. This study thoroughly evaluates this product, highlighting its potential for science. The impact observations GEOS-5 system is explored by examining spatial distribution observation-minus-forecast statistics. Independent are used product validation. correlation coefficient lower-stratospheric column with ozonesondes 0.99 bias 0.5%, indicating success in reproducing variability that layer. upper-tropospheric about 10% lower than ozonesonde but still high (0.87). shown to realistically capture sharp cross-tropopause gradient mixing ratio. Occurrence transport-driven low laminae similar obtained High Resolution Dynamics Sounder (HIRDLS) above 400 K temperature surface produces fewer seen HIRDLS below surface. Although - 8 occurrences per day (up approximately 20%) during three data, interannual captured correctly. data-driven complementary fields generated chemistry transport models. Applications include radiative forcing tracer near tropopause.