Stratospheric intrusion-influenced ozone air quality exceedances investigated in the NASA MERRA-2 Reanalysis

Geophysical Research Letters
K Emma KnowlandKrzysztof Wargan

Abstract

Stratospheric intrusions have been the interest of decades of research for their ability to bring stratospheric ozone (O3) into the troposphere with the potential to enhance surface O3 concentrations. However, these intrusions have been misrepresented in models and reanalyses until recently, as the features of a stratospheric intrusion are best identified in horizontal resolutions of 50 km or smaller. NASA's Modern-Era Retrospective Analysis for Research and Applications Version-2 (MERRA-2) reanalysis is a publicly-available high-resolution dataset (~50 km) with assimilated O3 that characterizes O3 on the same spatiotemporal resolution as the meteorology. We demonstrate the science capabilities of the MERRA-2 reanalysis when applied to the evaluation of stratospheric intrusions that impact surface air quality. This is demonstrated through a case study analysis of stratospheric intrusion-influenced O3 exceedences in spring 2012 in Colorado, using a combination of observations, the MERRA-2 reanalysis and the Goddard Earth Observing System Model, Version 5 (GEOS-5) simulations.

References

Dec 17, 2008·Annals of the New York Academy of Sciences·R NietoL Gimeno
Feb 18, 2016·Environmental Science & Technology·Pao M BaylonMae S Gustin
Mar 13, 2018·Journal of Climate·Krzysztof WarganGary Partyka

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Citations

Oct 27, 2018·Elementa : Science of the Anthropocene·Daniel A JaffTom Moore
Jun 29, 2017·Risk Analysis : an Official Publication of the Society for Risk Analysis·Enrico Biffis, Erik Chavez
Nov 24, 2020·Heliyon·Mark R Jury, Ivan L Fontanez-Vazquez
May 15, 2021·Journal of Environmental Sciences (China)·Chuhan LuMingge Li

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