The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations
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Cites background from "The Anomalous 2019 Antarctic Ozone ..."
...In September 2019 the polar vortex was also significantly disturbed (Wargan et al., 2020; Lim et al., 2020; see purple lines in Figs....
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...The minimum TOC values in the Antarctic were noticeably higher in 2019 than in previous years (Wargan et al., 2020; see the purple line in Fig....
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...It becomes evident that in winter the zonal mean zonal winds (at 60◦ S, 10 hPa) are stronger (by about 30 m s−1), and the minimum temperatures (polar cap, 50 hPa) are much lower (about 10 K) than in the Arctic (see also Wargan et al., 2020)....
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"The Anomalous 2019 Antarctic Ozone ..." refers background in this paper
...…zonal wind at 5, 10, and 70 hPa, and the ozone hole area from the Modern‐Era Retrospective Analysis for Research and Applications, Version 2 (MERRA‐2; Gelaro et al., 2017; GMAO, 2015a, 2015b) and a Global Earth Observing System (GEOS) assimilation discussed below, along with the 2005–2018 mean,…...
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3,131 citations
"The Anomalous 2019 Antarctic Ozone ..." refers background in this paper
...…defined as regions with total ozone column of 220 Dobson units (DU) or less, have formed over Antarctica every austral spring since the early 1980s (Farman et al., 1985; Komhyr et al., 1986; Stolarski et al., 1986) and constitute the most dramatic manifestation of the twentieth century…...
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1,644 citations
"The Anomalous 2019 Antarctic Ozone ..." refers methods in this paper
...Named, the Belgian Assimilation System for Chemical ObsErvations (BASCOE) Reanalysis of Aura MLS, WARGAN ET AL....
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...We assimilate observed stratospheric profiles of ozone, HCl, N2O, water vapor, and HNO3 from the MLS instrument onboard NASA's Aura satellite....
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...Additionally, the system assimilates total ozone column observations from the OMI instrument also onboard Aura (Levelt et al., 2006, 2018) in the same way as it is done in MERRA‐2 (Wargan et al., 2017)....
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1,191 citations
"The Anomalous 2019 Antarctic Ozone ..." refers background in this paper
...MLS (Waters et al., 2006) measures thermal radiation in a broad spectrum of microwave bands allowing high‐quality retrievals of temperature and stratospheric concentrations of a wide variety of constituents....
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922 citations
"The Anomalous 2019 Antarctic Ozone ..." refers background in this paper
...…major sudden stratospheric warmings (SSWs), defined as reversal events of the 60°S/60°N zonal mean zonal winds at 10 hPa (e.g., Butler et al., 2017; Charlton & Polvani, 2007), are common in the Northern Hemisphere (NH), only one major SSW in the SH occurred since at least the late 1950s (e.g.,…...
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