Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR
The middle atmosphere was affected by an exceptionally strong midwinter stratospheric sudden warming (SSW) during the Arctic winter 2012/2013. These unusual meteorological conditions led to a breakdown of the polar vortex, followed by the reformation of a strong upper stratospheric vortex associated...
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ftchalmersuniv:oai:research.chalmers.se:203376 2023-05-15T14:54:16+02:00 Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR Perot, Kristell Urban, Joachim Murtagh, Donal 2014 text https://doi.org/10.5194/acp-14-8009-2014 https://research.chalmers.se/en/publication/203376 unknown http://dx.doi.org/10.5194/acp-14-8009-2014 https://research.chalmers.se/en/publication/203376 Meteorology and Atmospheric Sciences Middle atmosphere Nitric Oxide Energetic Particle Precipitation Odin/SMR 2014 ftchalmersuniv https://doi.org/10.5194/acp-14-8009-2014 2022-12-11T07:02:48Z The middle atmosphere was affected by an exceptionally strong midwinter stratospheric sudden warming (SSW) during the Arctic winter 2012/2013. These unusual meteorological conditions led to a breakdown of the polar vortex, followed by the reformation of a strong upper stratospheric vortex associated with particularly efficient descent of air. Measurements by the submillimetre radiometer (SMR), on board the Odin satellite, show that very large amounts of nitric oxide (NO), produced by energetic particle precipitation (EPP) in the mesosphere/lower thermosphere (MLT), could thus enter the polar stratosphere in early 2013. The mechanism referring to the downward transport of EPP-generated NOx during winter is generally called the EPP indirect effect. SMR observed up to 20 times more NO in the upper stratosphere than the average NO measured at the same latitude, pressure and time during three previous winters where no mixing between mesospheric and stratospheric air was noticeable. This event turned out to be the strongest in the aeronomy-only period of SMR (2007–present). Our study is based on a comparison with the Arctic winter 2008/2009, when a similar situation was observed. This outstanding situation is the result of the combination of a relatively high geomagnetic activity and an unusually high dynamical activity, which makes this case a prime example to study the EPP impacts on the atmospheric composition. Other/Unknown Material Arctic Chalmers University of Technology: Chalmers research Arctic Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Atmospheric Chemistry and Physics 14 15 8009 8015 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Meteorology and Atmospheric Sciences Middle atmosphere Nitric Oxide Energetic Particle Precipitation Odin/SMR |
spellingShingle |
Meteorology and Atmospheric Sciences Middle atmosphere Nitric Oxide Energetic Particle Precipitation Odin/SMR Perot, Kristell Urban, Joachim Murtagh, Donal Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
topic_facet |
Meteorology and Atmospheric Sciences Middle atmosphere Nitric Oxide Energetic Particle Precipitation Odin/SMR |
description |
The middle atmosphere was affected by an exceptionally strong midwinter stratospheric sudden warming (SSW) during the Arctic winter 2012/2013. These unusual meteorological conditions led to a breakdown of the polar vortex, followed by the reformation of a strong upper stratospheric vortex associated with particularly efficient descent of air. Measurements by the submillimetre radiometer (SMR), on board the Odin satellite, show that very large amounts of nitric oxide (NO), produced by energetic particle precipitation (EPP) in the mesosphere/lower thermosphere (MLT), could thus enter the polar stratosphere in early 2013. The mechanism referring to the downward transport of EPP-generated NOx during winter is generally called the EPP indirect effect. SMR observed up to 20 times more NO in the upper stratosphere than the average NO measured at the same latitude, pressure and time during three previous winters where no mixing between mesospheric and stratospheric air was noticeable. This event turned out to be the strongest in the aeronomy-only period of SMR (2007–present). Our study is based on a comparison with the Arctic winter 2008/2009, when a similar situation was observed. This outstanding situation is the result of the combination of a relatively high geomagnetic activity and an unusually high dynamical activity, which makes this case a prime example to study the EPP impacts on the atmospheric composition. |
author |
Perot, Kristell Urban, Joachim Murtagh, Donal |
author_facet |
Perot, Kristell Urban, Joachim Murtagh, Donal |
author_sort |
Perot, Kristell |
title |
Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
title_short |
Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
title_full |
Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
title_fullStr |
Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
title_full_unstemmed |
Unusually strong nitric oxide descent in the Arctic middle atmosphere in early 2013 as observed by Odin/SMR |
title_sort |
unusually strong nitric oxide descent in the arctic middle atmosphere in early 2013 as observed by odin/smr |
publishDate |
2014 |
url |
https://doi.org/10.5194/acp-14-8009-2014 https://research.chalmers.se/en/publication/203376 |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Arctic Midwinter |
geographic_facet |
Arctic Midwinter |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://dx.doi.org/10.5194/acp-14-8009-2014 https://research.chalmers.se/en/publication/203376 |
op_doi |
https://doi.org/10.5194/acp-14-8009-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
15 |
container_start_page |
8009 |
op_container_end_page |
8015 |
_version_ |
1766325991117946880 |