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South Pole Station ozonesondes: variability and trends in the springtime Antarctic ozone hole 1986–2021

Johnson, Bryan and Cullis, Patrick and Booth, John and Petropavlovskikh, Irina and McConville, Glen and Hassler, Birgit and Morris, Gary and Sterling, Chance and Oltmans, Samuel (2023) South Pole Station ozonesondes: variability and trends in the springtime Antarctic ozone hole 1986–2021. Atmospheric Chemistry and Physics (ACP) (23), pp. 3133-3146. Copernicus Publications. doi: 10.5194/acp-23-3133-2023. ISSN 1680-7316.

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Official URL: https://acp.copernicus.org/articles/23/3133/2023/acp-23-3133-2023.pdf


Balloon-borne ozonesondes launched weekly from South Pole Station (1986–2021) measure high�vertical-resolution profiles of ozone and temperature from the surface to 30–35 km altitude. The launch frequency is increased in late winter before the onset of rapid stratospheric ozone loss in September. Ozone hole metrics show that the yearly total column ozone and 14–21 km partial column ozone minimum values and September loss rate trends have been improving (less severe) since 2001. The 36-year record also shows interannual vari�ability, especially in recent years (2019–2021). Here we show additional details of these 3 years by comparing annual minimum profiles observed on the date when the lowest integrated total column ozone occurs. We also compare the July–December time series of the 14–21 km partial column ozone values to the 36-year median with percentile intervals. The 2019 anomalous vortex breakdown showed stratospheric temperatures began warming in early September followed by reduced ozone loss. The minimum total column ozone of 180 Dobson units (DU) was observed on 24 September. This was followed by two stable and cold polar vortex years during 2020 and 2021 with total column ozone minimums at 104 DU (1 October) and 102 DU (7 October), respectively. These years also showed broad near-zero-ozone (loss saturation) regions within the 14–21 km layer by the end of September which persisted into October. Validation of the ozonesonde observations is conducted through the ongoing comparison of total column ozone measurements with the South Pole ground-based Dobson spectrophotometer. The ozonesondes show a more positive bias of 2 ± 3 % (higher) than the Dobson following a thorough evaluation and homogenization of the long-term ozonesonde record completed in 2018.

Item URL in elib:https://elib.dlr.de/194400/
Document Type:Article
Title:South Pole Station ozonesondes: variability and trends in the springtime Antarctic ozone hole 1986–2021
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Johnson, BryanNOAA Global Monitoring Laboratory (NOAA/ESRL/GML)UNSPECIFIEDUNSPECIFIED
Cullis, PatrickNOAA Global Monitoring Laboratory (NOAA/ESRL/GML)UNSPECIFIEDUNSPECIFIED
Petropavlovskikh, IrinaUniversity of Colorado, Boulder, CO, USAUNSPECIFIEDUNSPECIFIED
McConville, GlenNOAA Global Monitoring Laboratory (NOAA/ESRL/GML)UNSPECIFIEDUNSPECIFIED
Sterling, ChanceBoulder, CO 80309, USAUNSPECIFIEDUNSPECIFIED
Oltmans, SamuelNOAA Global Monitoring Laboratory (NOAA/ESRL/GML)UNSPECIFIEDUNSPECIFIED
Date:March 2023
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 3133-3146
Publisher:Copernicus Publications
Keywords:South Pole; ozone; ozone recovery
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Model Evaluation and Analysis
Deposited By: Hassler, Dr. Birgit
Deposited On:20 Mar 2023 15:19
Last Modified:20 Mar 2023 15:19

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