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Siege of the South: Hunga Tonga-Hunga Ha’apai Water Vapor Excluded from 2022 Antarctic Stratospheric Polar Vortex
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  • Gloria L Manney,
  • Michelle L. Santee,
  • Alyn Lambert,
  • Luis Millan,
  • Ken Minschwaner,
  • Frank Werner,
  • Zachary Duane Lawrence,
  • William G. Read,
  • Nathaniel J Livesey,
  • Tao Wang
Gloria L Manney
Northwest Research Associates

Corresponding Author:[email protected]

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Michelle L. Santee
Jet Propulsion Laboratory
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Alyn Lambert
Jet Propulsion Lab (NASA)
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Luis Millan
Jet propulsion laboratory
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Ken Minschwaner
New Mexico Institute of Mining and Technology
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Frank Werner
Jet Propulsion Laboratory
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Zachary Duane Lawrence
CIRES/NOAA
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William G. Read
Jet Propulsion Lab (NASA)
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Nathaniel J Livesey
Jet Propulsion Laboratory
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Tao Wang
NASA JPL / Caltech
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Abstract

We use Aura Microwave Limb Sounder (MLS) trace gas measurements to investigate whether water vapor (H2O) injected into the stratosphere by the Hunga Tonga-Hunga Ha’apai (HTHH) eruption affected the 2022 Antarctic stratospheric vortex. Other MLS-measured long-lived species are used to distinguish high HTHH H2O from that descending in the vortex from the upper-stratospheric H2O peak. HTHH H2O reached high southern latitudes in June–July but was effectively excluded from the vortex by the strong transport barrier at its edge. MLS H2O, nitric acid, chlorine species, and ozone within the 2022 Antarctic polar vortex were near average; the vortex was large, strong, and long-lived, but not exceptionally so. There is thus no clear evidence of HTHH influence on the 2022 Antarctic vortex or its composition. Substantial impacts on the stratospheric polar vortices are expected in succeeding years since the H2O injected by HTHH has spread globally.
29 Mar 2023Submitted to ESS Open Archive
04 Apr 2023Published in ESS Open Archive