Impact of geomagnetic excursions on atmospheric chemistry and dynamics ...
Geomagnetic excursions, i.e. short periods in time with much weaker geomagnetic fields and substantial changes in the position of the geomagnetic pole, occurred repeatedly in the Earth's history, e.g. the Laschamp event about 41 kyr ago. Although the next such excursion is certain to come, litt...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000087120 http://hdl.handle.net/20.500.11850/87120 |
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ftdatacite:10.3929/ethz-b-000087120 2024-04-28T08:01:34+00:00 Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... Suter, I. Zech, Roland Anet, J.G. Peter, Thomas 2014 application/pdf https://dx.doi.org/10.3929/ethz-b-000087120 http://hdl.handle.net/20.500.11850/87120 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 article-journal Text ScholarlyArticle Journal Article 2014 ftdatacite https://doi.org/10.3929/ethz-b-000087120 2024-04-02T12:34:54Z Geomagnetic excursions, i.e. short periods in time with much weaker geomagnetic fields and substantial changes in the position of the geomagnetic pole, occurred repeatedly in the Earth's history, e.g. the Laschamp event about 41 kyr ago. Although the next such excursion is certain to come, little is known about the timing and possible consequences for the state of the atmosphere and the ecosystems. Here we use the global chemistry climate model SOCOL-MPIOM to simulate the effects of geomagnetic excursions on atmospheric ionization, chemistry and dynamics. Our simulations show significantly increased concentrations of nitrogen oxides (NOx) in the entire stratosphere, especially over Antarctica (+15%), due to enhanced ionization by galactic cosmic rays. Hydrogen oxides (HOx) are also produced in greater amounts (up to +40%) in the tropical and subtropical lower stratosphere, while their destruction by reactions with enhanced NOx prevails over the poles and in high altitudes (by −5%). Stratospheric ozone ... : Climate of the Past, 10 (3) ... Article in Journal/Newspaper Antarc* Antarctica Geomagnetic Pole DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
Geomagnetic excursions, i.e. short periods in time with much weaker geomagnetic fields and substantial changes in the position of the geomagnetic pole, occurred repeatedly in the Earth's history, e.g. the Laschamp event about 41 kyr ago. Although the next such excursion is certain to come, little is known about the timing and possible consequences for the state of the atmosphere and the ecosystems. Here we use the global chemistry climate model SOCOL-MPIOM to simulate the effects of geomagnetic excursions on atmospheric ionization, chemistry and dynamics. Our simulations show significantly increased concentrations of nitrogen oxides (NOx) in the entire stratosphere, especially over Antarctica (+15%), due to enhanced ionization by galactic cosmic rays. Hydrogen oxides (HOx) are also produced in greater amounts (up to +40%) in the tropical and subtropical lower stratosphere, while their destruction by reactions with enhanced NOx prevails over the poles and in high altitudes (by −5%). Stratospheric ozone ... : Climate of the Past, 10 (3) ... |
format |
Article in Journal/Newspaper |
author |
Suter, I. Zech, Roland Anet, J.G. Peter, Thomas |
spellingShingle |
Suter, I. Zech, Roland Anet, J.G. Peter, Thomas Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
author_facet |
Suter, I. Zech, Roland Anet, J.G. Peter, Thomas |
author_sort |
Suter, I. |
title |
Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
title_short |
Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
title_full |
Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
title_fullStr |
Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
title_full_unstemmed |
Impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
title_sort |
impact of geomagnetic excursions on atmospheric chemistry and dynamics ... |
publisher |
ETH Zurich |
publishDate |
2014 |
url |
https://dx.doi.org/10.3929/ethz-b-000087120 http://hdl.handle.net/20.500.11850/87120 |
genre |
Antarc* Antarctica Geomagnetic Pole |
genre_facet |
Antarc* Antarctica Geomagnetic Pole |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000087120 |
_version_ |
1797573255676035072 |