Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016
Activated chlorine compounds in the polar winter stratosphere drive catalytic cycles that deplete ozone and methane, whose abundances are highly relevant to the evolution of global climate. The present work introduces a novel dataset of in situ measurements of relevant chlorine species in the lowerm...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-19-10757-2019 https://www.atmos-chem-phys.net/19/10757/2019/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp75815 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp75815 2023-05-15T14:58:32+02:00 Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 Marsing, Andreas Jurkat-Witschas, Tina Grooß, Jens-Uwe Kaufmann, Stefan Heller, Romy Engel, Andreas Hoor, Peter Krause, Jens Voigt, Christiane 2019-08-26 application/pdf https://doi.org/10.5194/acp-19-10757-2019 https://www.atmos-chem-phys.net/19/10757/2019/ eng eng doi:10.5194/acp-19-10757-2019 https://www.atmos-chem-phys.net/19/10757/2019/ eISSN: 1680-7324 Text 2019 ftcopernicus https://doi.org/10.5194/acp-19-10757-2019 2019-12-24T09:48:38Z Activated chlorine compounds in the polar winter stratosphere drive catalytic cycles that deplete ozone and methane, whose abundances are highly relevant to the evolution of global climate. The present work introduces a novel dataset of in situ measurements of relevant chlorine species in the lowermost Arctic stratosphere from the aircraft mission POLSTRACC–GW-LCYCLE–SALSA during winter 2015/2016. The major stages of chemical evolution of the lower polar vortex are presented in a consistent series of high-resolution mass spectrometric observations of HCl and ClONO 2 . Simultaneous measurements of CFC-12 are used to derive total inorganic chlorine ( Cl y ) and active chlorine ( ClO x ). The new data highlight an altitude dependence of the pathway for chlorine deactivation in the lowermost vortex with HCl dominating below the 380 K isentropic surface and ClONO 2 prevailing above. Further, we show that the Chemical Lagrangian Model of the Stratosphere (CLaMS) is generally able to reproduce the chemical evolution of the lower polar vortex chlorine budget, except for a bias in HCl concentrations. The model is used to relate local measurements to the vortex-wide evolution. The results are aimed at fostering our understanding of the climate impact of chlorine chemistry, providing new observational data to complement satellite data and assess model performance in the climate-sensitive upper troposphere and lower stratosphere region. Text Arctic Copernicus Publications: E-Journals Arctic Atmospheric Chemistry and Physics 19 16 10757 10772 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Activated chlorine compounds in the polar winter stratosphere drive catalytic cycles that deplete ozone and methane, whose abundances are highly relevant to the evolution of global climate. The present work introduces a novel dataset of in situ measurements of relevant chlorine species in the lowermost Arctic stratosphere from the aircraft mission POLSTRACC–GW-LCYCLE–SALSA during winter 2015/2016. The major stages of chemical evolution of the lower polar vortex are presented in a consistent series of high-resolution mass spectrometric observations of HCl and ClONO 2 . Simultaneous measurements of CFC-12 are used to derive total inorganic chlorine ( Cl y ) and active chlorine ( ClO x ). The new data highlight an altitude dependence of the pathway for chlorine deactivation in the lowermost vortex with HCl dominating below the 380 K isentropic surface and ClONO 2 prevailing above. Further, we show that the Chemical Lagrangian Model of the Stratosphere (CLaMS) is generally able to reproduce the chemical evolution of the lower polar vortex chlorine budget, except for a bias in HCl concentrations. The model is used to relate local measurements to the vortex-wide evolution. The results are aimed at fostering our understanding of the climate impact of chlorine chemistry, providing new observational data to complement satellite data and assess model performance in the climate-sensitive upper troposphere and lower stratosphere region. |
format |
Text |
author |
Marsing, Andreas Jurkat-Witschas, Tina Grooß, Jens-Uwe Kaufmann, Stefan Heller, Romy Engel, Andreas Hoor, Peter Krause, Jens Voigt, Christiane |
spellingShingle |
Marsing, Andreas Jurkat-Witschas, Tina Grooß, Jens-Uwe Kaufmann, Stefan Heller, Romy Engel, Andreas Hoor, Peter Krause, Jens Voigt, Christiane Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
author_facet |
Marsing, Andreas Jurkat-Witschas, Tina Grooß, Jens-Uwe Kaufmann, Stefan Heller, Romy Engel, Andreas Hoor, Peter Krause, Jens Voigt, Christiane |
author_sort |
Marsing, Andreas |
title |
Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
title_short |
Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
title_full |
Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
title_fullStr |
Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
title_full_unstemmed |
Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016 |
title_sort |
chlorine partitioning in the lowermost arctic vortex during the cold winter 2015/2016 |
publishDate |
2019 |
url |
https://doi.org/10.5194/acp-19-10757-2019 https://www.atmos-chem-phys.net/19/10757/2019/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-19-10757-2019 https://www.atmos-chem-phys.net/19/10757/2019/ |
op_doi |
https://doi.org/10.5194/acp-19-10757-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
16 |
container_start_page |
10757 |
op_container_end_page |
10772 |
_version_ |
1766330672989863936 |