Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016
Abstract. During winter 2015/2016 the Arctic stratosphere was characterized by extraordinarily low temperatures in connection with the occurrence of extensive polar stratospheric clouds. From mid of December 2015 until mid of March 2016 the German research aircraft HALO (High Altitude and Long–Range...
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ftfzjuelichnvdb:oai:juser.fz-juelich.de:897123 2023-05-15T14:52:58+02:00 Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 Ziereis, Helmut Hoor, Peter Woiwode, Wolfgang Braun, Marleen Ungermann, Jörn Marsing, Andreas Voigt, Christiane Engel, Andreas Sinnhuber, Björn-Martin Oelhaf, Hermann Grooß, Jens-Uwe Zahn, Andreas Stratmann, Greta Stock, Paul Lichtenstern, Michael Krause, Jens Afchine, Armin Rolf, Christian DE 2021 https://juser.fz-juelich.de/record/897123 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-03621%22 eng eng EGU info:eu-repo/semantics/altIdentifier/issn/1680-7367 info:eu-repo/semantics/altIdentifier/hdl/2128/28766 info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2021-707 https://juser.fz-juelich.de/record/897123 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-03621%22 info:eu-repo/semantics/openAccess Atmospheric chemistry and physics / Discussions (2021). doi:10.5194/acp-2021-707 info:eu-repo/classification/ddc/550 info:eu-repo/semantics/preprint info:eu-repo/semantics/publishedVersion 2021 ftfzjuelichnvdb https://doi.org/10.5194/acp-2021-707 2022-07-14T11:22:47Z Abstract. During winter 2015/2016 the Arctic stratosphere was characterized by extraordinarily low temperatures in connection with the occurrence of extensive polar stratospheric clouds. From mid of December 2015 until mid of March 2016 the German research aircraft HALO (High Altitude and Long–Range Research Aircraft) was deployed to probe the lowermost stratosphere in the Arctic region within the POLSTRACC (Polar Stratosphere in a Changing Climate) mission. More than twenty flights have been conducted out of Kiruna/Sweden and Oberpfaffenhofen/Germany, covering the whole winter period. Besides total reactive nitrogen (NOy), observations of nitrous oxide, nitric acid, ozone and water were used for this study. Total reactive nitrogen and its partitioning between gas- and particle phase are key parameters for understanding processes controlling the ozone budget in the polar winter stratosphere. The redistribution of total reactive nitrogen was evaluated by using tracer–tracer correlations. In January air masses with extensive nitrification were encountered at altitudes between 12 and 15 km. The excess NOy amounted up to about 6 ppb. During several flights, along with gas–phase nitrification, indications for extensive occurrence of nitric acid containing particles at flight altitude were found. These observations support the assumption of sedimentation and subsequent evaporation of nitric acid containing particles leading to redistribution of total reactive nitrogen. Remnants of nitrified air masses have been observed until mid of March. Between end of February and mid of March also de-nitrified air masses have been observed in connection with high potential temperatures. Using tracer–tracer correlations, missing total reactive nitrogen was estimated to amount up to 6 ppb. This indicates the downward transport of air masses that have been denitrified during the earlier winter phase. Observations within POLSTRACC, at the bottom of the vortex, reflect heterogeneous processes from the overlying Arctic winter ... Report Arctic Kiruna Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Arctic Kiruna |
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Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) |
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ftfzjuelichnvdb |
language |
English |
topic |
info:eu-repo/classification/ddc/550 |
spellingShingle |
info:eu-repo/classification/ddc/550 Ziereis, Helmut Hoor, Peter Woiwode, Wolfgang Braun, Marleen Ungermann, Jörn Marsing, Andreas Voigt, Christiane Engel, Andreas Sinnhuber, Björn-Martin Oelhaf, Hermann Grooß, Jens-Uwe Zahn, Andreas Stratmann, Greta Stock, Paul Lichtenstern, Michael Krause, Jens Afchine, Armin Rolf, Christian Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
topic_facet |
info:eu-repo/classification/ddc/550 |
description |
Abstract. During winter 2015/2016 the Arctic stratosphere was characterized by extraordinarily low temperatures in connection with the occurrence of extensive polar stratospheric clouds. From mid of December 2015 until mid of March 2016 the German research aircraft HALO (High Altitude and Long–Range Research Aircraft) was deployed to probe the lowermost stratosphere in the Arctic region within the POLSTRACC (Polar Stratosphere in a Changing Climate) mission. More than twenty flights have been conducted out of Kiruna/Sweden and Oberpfaffenhofen/Germany, covering the whole winter period. Besides total reactive nitrogen (NOy), observations of nitrous oxide, nitric acid, ozone and water were used for this study. Total reactive nitrogen and its partitioning between gas- and particle phase are key parameters for understanding processes controlling the ozone budget in the polar winter stratosphere. The redistribution of total reactive nitrogen was evaluated by using tracer–tracer correlations. In January air masses with extensive nitrification were encountered at altitudes between 12 and 15 km. The excess NOy amounted up to about 6 ppb. During several flights, along with gas–phase nitrification, indications for extensive occurrence of nitric acid containing particles at flight altitude were found. These observations support the assumption of sedimentation and subsequent evaporation of nitric acid containing particles leading to redistribution of total reactive nitrogen. Remnants of nitrified air masses have been observed until mid of March. Between end of February and mid of March also de-nitrified air masses have been observed in connection with high potential temperatures. Using tracer–tracer correlations, missing total reactive nitrogen was estimated to amount up to 6 ppb. This indicates the downward transport of air masses that have been denitrified during the earlier winter phase. Observations within POLSTRACC, at the bottom of the vortex, reflect heterogeneous processes from the overlying Arctic winter ... |
format |
Report |
author |
Ziereis, Helmut Hoor, Peter Woiwode, Wolfgang Braun, Marleen Ungermann, Jörn Marsing, Andreas Voigt, Christiane Engel, Andreas Sinnhuber, Björn-Martin Oelhaf, Hermann Grooß, Jens-Uwe Zahn, Andreas Stratmann, Greta Stock, Paul Lichtenstern, Michael Krause, Jens Afchine, Armin Rolf, Christian |
author_facet |
Ziereis, Helmut Hoor, Peter Woiwode, Wolfgang Braun, Marleen Ungermann, Jörn Marsing, Andreas Voigt, Christiane Engel, Andreas Sinnhuber, Björn-Martin Oelhaf, Hermann Grooß, Jens-Uwe Zahn, Andreas Stratmann, Greta Stock, Paul Lichtenstern, Michael Krause, Jens Afchine, Armin Rolf, Christian |
author_sort |
Ziereis, Helmut |
title |
Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
title_short |
Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
title_full |
Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
title_fullStr |
Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
title_full_unstemmed |
Redistribution of total reactive nitrogen in the lowermost Arctic stratosphere during the cold winter 2015/2016 |
title_sort |
redistribution of total reactive nitrogen in the lowermost arctic stratosphere during the cold winter 2015/2016 |
publisher |
EGU |
publishDate |
2021 |
url |
https://juser.fz-juelich.de/record/897123 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-03621%22 |
op_coverage |
DE |
geographic |
Arctic Kiruna |
geographic_facet |
Arctic Kiruna |
genre |
Arctic Kiruna |
genre_facet |
Arctic Kiruna |
op_source |
Atmospheric chemistry and physics / Discussions (2021). doi:10.5194/acp-2021-707 |
op_relation |
info:eu-repo/semantics/altIdentifier/issn/1680-7367 info:eu-repo/semantics/altIdentifier/hdl/2128/28766 info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2021-707 https://juser.fz-juelich.de/record/897123 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-03621%22 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-2021-707 |
_version_ |
1766324371145621504 |