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- W2786999066 abstract "Abstract. Potential sources of a priori ozone (O3) profiles for use in Tropospheric Emissions: Monitoring of Pollution (TEMPO) satellite tropospheric O3 retrievals are evaluated with observations from multiple Tropospheric Ozone Lidar Network (TOLNet) systems in North America. An O3 profile climatology (tropopause-based O3 climatology (TB-Clim), currently proposed for use in TEMPO O3 retrieval algorithms) based on ozonesonde observations and O3 profiles from 3 separate models (operational Goddard Earth Observing System (GEOS-5) Forward Processing (FP) product, reanalysis product from Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA2), and the GEOS-Chem chemical transport model (CTM)) were: 1) evaluated with TOLNet measurements on various temporal scales (seasonally, daily, hourly) and 2) implemented as a priori information in theoretical TEMPO tropospheric O3 retrievals in order to determine how each a priori impacts the accuracy of retrieved tropospheric (0–10 km) and lowermost tropospheric (LMT, 0–2 km) O3 columns. We found that all potential sources of a priori profiles evaluated in this study generally reproduced the vertical structure of summer-averaged observations of O3 profiles. However, larger differences between the a priori profiles and lidar observations were observed when evaluating inter-daily and diurnal variability of tropospheric O3. The TB-Clim O3 profile climatology was unable to replicate observed inter-daily and diurnal variability of O3 while model products, in particular GEOS-Chem simulations, displayed more skill in reproducing these features. Due to the ability of models, primarily the CTM used in this study, on average to capture the inter-daily and diurnal variability of tropospheric and LMT O3 columns, using a priori profiles from these model simulations resulted in TEMPO retrievals with the best statistical comparison with lidar observations. Furthermore, important from an air quality perspective, when high LMT O3 values are observed, using GEOS-Chem a priori profiles resulted in TEMPO LMT O3 retrievals with the least bias." @default.
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- W2786999066 date "2018-01-30" @default.
- W2786999066 modified "2023-09-23" @default.
- W2786999066 title "Potential sources of a priori ozone profiles for TEMPO tropospheric ozone retrievals" @default.
- W2786999066 doi "https://doi.org/10.5194/amt-2017-484" @default.
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