Summertime tropospheric ozone columns from Aura OMI/MLS measurements versus regional model results over the United States

Abstract

Ozone columns below 147 hPa are derived over the United States from September 2004 to August 2005 from the differences between clear‐sky Aura OMI columns and coincident MLS columns. The mean difference from coincident ozonesonde measurements at four USA sites is 0.3 DU with an rms difference of 10.1 DU and a correlation coefficient of 0.67. Semimonthly patterns of the columns over the USA for the summer of 2005 have been produced. The observed columns, as well as Regional Air Quality Forecast (RAQAST) model columns, show high values over the southeastern USA and its surrounding oceans. Changes of these columns exceeding 6 DU in many places were observed between June 17–30 and July 1–16 and the changes reversed in the following two‐week period. Comparisons against calculations from the RAQAST model, as well as correlations with geopotential height changes at 147 hPa, indicate that these changes were primarily related to dynamics.

The Chemistry CATT-BRAMS model (CCATT-BRAMS 4.5): a regional atmospheric model system for integrated air quality and weather forecasting and research

“…5). In both cases, the reader must disregard noise in the OMI/MLS retrieval over higher latitudes (Jing et al, 2006;Waters et al, 2006).…”

Summertime impact of convective transport and lightning NO<sub>x</sub> production over North America: modeling dependence on meteorological simulations

“…Previously, this model was applied to investigate a number of tropospheric chemistry and transport problems at northern mid latitudes (Choi et al, 2005(Choi et al, , 2008aJing et al, 2006;Wang et al, 2006;Gillus et al, 2008) and in the polar regions Wang et al, 2007). In this work, the REAM model is developed to use the WRF assimilated meteorological fields (WRF-REAM).…”

The Ozone Monitoring Instrument: overview of 14 years in space

“…Several schemes have been used to derive tropospheric ozone by combining OMI and MLS. Jing et al (2006) and Ziemke et al (2006) subtracted MLS stratospheric column ozone from OMI total column ozone to derive tropospheric column ozone residual. While Jing et al (2006) applied a criterion for near-coincidence between OMI and MLS along orbital track, Ziemke et al (2006) used a 2-D interpolation technique to fill in missing MLS measurements between orbital tracks and improve horizontal coverage.…”

“…Jing et al (2006) and Ziemke et al (2006) subtracted MLS stratospheric column ozone from OMI total column ozone to derive tropospheric column ozone residual. While Jing et al (2006) applied a criterion for near-coincidence between OMI and MLS along orbital track, Ziemke et al (2006) used a 2-D interpolation technique to fill in missing MLS measurements between orbital tracks and improve horizontal coverage. Schoeberl et al (2007) further used a wind trajectory mapping technique of MLS ozone profiles and used potential vorticity mapping to obtain better signal-to-noise ratio and horizontal coverage for the OMI/MLS tropospheric column ozone.…”